Undermind Search: Experimental realizations of routing or shuttling trapped ions in three dimensions in a quantum computer. I want to find papers which specifically focus on the routing and shuttling characteristics, and only in 3 dimensions, not 2 or 1 dimensions.

Research Topic

Experimental realizations of routing or shuttling trapped ions in three dimensions in a quantum computer. I want to find papers which specifically focus on the routing and shuttling characteristics, and only in 3 dimensions, not 2 or 1 dimensions.

Summary

The literature search found significant contributions to the experimental realizations of routing or shuttling trapped ions in three dimensions in quantum computing, particularly highlighted in references [1] and [2].

[1] presents a high success rate in shuttling Mg$^{+}$ ions across multiple sites in a 3D trap-array, preserving qubit coherence during the process, which is critical for scalable quantum architectures.
[2] introduces and simulates a novel ion trap design specifically for vertical (3D) ion shuttling, which underlines the practical implementation of 3D spatial control over ions during quantum operations.
These findings address both the experimental validation and technological design aspects for 3D ion shuttling, serving as milestones in building operational three-dimensional quantum computing systems.

To understand the relationships and patterns within the papers found, see also:

Experimental Realizations of 3D Ion Shuttling in Quantum Computing

This category includes papers that explicitly discuss the experimental methodologies and results related to the 3D routing or shuttling of trapped ions for quantum computing applications. References: [1, 2]

Technological Advancements for 3D Ion Trap Architectures

Includes papers proposing or discussing three-dimensional trap designs and their feasibility, essential technologies for realizing intricate 3D architectures but not directly experimental routing or shuttling. References: [3, 12, 13, 14, 23, 24]

Contributions to Scalability and Coherence in 3D Ion Trapping

This category covers studies that address key factors like decoherence and scalability in the context of 3D ion trapping relevant to quantum computing even if they don't focus on actual routing/shuttling. References: [5, 7, 21, 22]

Conceptual and Theoretical Insights into 3D Ion Dynamics and Shuttling

Focuses on theoretical analyses, simulations, and frameworks that provide foundational understanding for 3D ion dynamics and shuttling, facilitating future experimental ventures. References: [8, 11]

So far, I've closely analyzed 640 of the most promising papers, and I've found ~3-31 that are relevant, which is probably ~66.2% of all that exist.

To get this estimate, we do a statistical analysis of the discovery process.

References

Last 5 years

Last 2 years

> 1 citation per year

> 5 citations per year

Topic Match

Cit./Year

Year

Paper

Paper Relevance Summary

98.0%

2.5

2023

[1] High-fidelity transport of trapped-ion qubits in a multilayer array Deviprasath Palani, ..., and T. Schaetz Physical Review A 2023 - 3 citations - Show abstract - Cite - PDF 98.0% topic match

Demonstrates shuttling of Mg$^+$ ions in a 3D trap-array. Achieves high success rate (>0.99999) for ion shuttling across up to thirteen sites. Preserves qubit coherence during inter-site transport, promising for scalable architectures.

Demonstrates shuttling of Mg$^+$ ions in a 3D trap-array. Achieves high success rate (>0.99999) for ion shuttling across up to thirteen sites. Preserves qubit coherence during inter-site transport, promising for scalable architectures.

88.1%

0.0

2019

[2] Surface Ion Trap Designs for Vertical Ion Shuttling Muhammad Yousif Channa, ..., and M. Y. Soomro Journal Not Provided 2019 - 0 citations - Show abstract - Cite 88.1% topic match

Proposes a novel ion trap for vertical ion shuttling. Introduces surface electrode trap designed for adiabatic, vertical movement. Simulates ion trajectories and investigates trap stability during shuttling.

Proposes a novel ion trap for vertical ion shuttling. Introduces surface electrode trap designed for adiabatic, vertical movement. Simulates ion trajectories and investigates trap stability during shuttling.

78.4%

0.0

2023

[3] 3D-Printed Micro Ion Trap Technology for Scalable Quantum Information Processing Shuqi Xu, ..., and Hartmut Haffner Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 78.4% topic match

Demonstrates fabrication of 3D-printed micro ion traps. Uses two-photon polymerization to create scalable, high-performance 3D structures. Focuses on trap fabrication techniques, not experimental 3D ion routing/shuttling.

Demonstrates fabrication of 3D-printed micro ion traps. Uses two-photon polymerization to create scalable, high-performance 3D structures. Focuses on trap fabrication techniques, not experimental 3D ion routing/shuttling.

70.7%

0.2

2019

[4] Micro-fabricated Surface Electrode Ion Trap with 3D-TSV Integration for Scalable Quantum Computing J. Tao, ..., and C. S. Tan 2019 Electron Devices Technology and Manufacturing Conference (EDTM) 2019 - 1 citations - Show abstract - Cite 70.7% topic match

Proposes 3D architecture for scalable ion-trap quantum computing. Utilizes TSV and microbump technologies to enhance electrode connectivity for ion trapping. Focuses on trap design and scalability, not explicit 3D ion routing or shuttling experiments.

Proposes 3D architecture for scalable ion-trap quantum computing. Utilizes TSV and microbump technologies to enhance electrode connectivity for ion trapping. Focuses on trap design and scalability, not explicit 3D ion routing or shuttling experiments.

57.5%

0.0

2023

[5] Bilayer crystals of trapped ions for quantum information processing S. Hawaldar, ..., and Athreya Shankar Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 57.5% topic match

Proposes utilization of Penning traps for bilayer ion crystals. Demonstrates a novel 3D arrangement using bilayers that could enhance quantum operations. Focuses on potential three-dimensional scalability, not experimental 3D routing or shuttling details.

Proposes utilization of Penning traps for bilayer ion crystals. Demonstrates a novel 3D arrangement using bilayers that could enhance quantum operations. Focuses on potential three-dimensional scalability, not experimental 3D routing or shuttling details.

54.0%

2.8

2023

[6] Using Boolean Satisfiability for Exact Shuttling in Trapped-Ion Quantum Computers Daniel Schoenberger, ..., and R. Wille Journal Not Provided 2023 - 2 citations - Show abstract - Cite - PDF 54.0% topic match

Proposes a Boolean satisfiability approach for optimizing ion shuttling. Focuses on minimizing decoherence by reducing shuttling time in quantum computers. Empirical evaluation demonstrates effectiveness; linked to quantum computing architectures.

Proposes a Boolean satisfiability approach for optimizing ion shuttling. Focuses on minimizing decoherence by reducing shuttling time in quantum computers. Empirical evaluation demonstrates effectiveness; linked to quantum computing architectures.

52.9%

0.0

2013

[7] Abstract Submitted for the DAMOP13 Meeting of The American Physical Society Scalable Techniques with Trapped Ion Quantum Information R. Bowler, ..., and Y. Lin Journal Not Provided 2013 - 0 citations - Show abstract - Cite 52.9% topic match

Demonstrates scalable quantum information processing with trapped ions. Utilizes a segmented trap for ion transport between distinct locations. Achieves diabatic ion transport with low motional excitations, relevant for 3D routing/shuttling.

Demonstrates scalable quantum information processing with trapped ions. Utilizes a segmented trap for ion transport between distinct locations. Achieves diabatic ion transport with low motional excitations, relevant for 3D routing/shuttling.

50.7%

4.1

2007

[8] On the transport of atomic ions in linear and multidimensional ion trap arrays D. Hucul, ..., and J. Rabchuk Quantum Inf. Comput. 2007 - 71 citations - Show abstract - Cite - PDF 50.7% topic match

Develops theoretical framework for 3D ion shuttling. Describes effects of shuttling on quantum state, emphasizing multidimensional traps. Primarily focuses on 2D junction examples, less on explicit 3D implementations.

Develops theoretical framework for 3D ion shuttling. Describes effects of shuttling on quantum state, emphasizing multidimensional traps. Primarily focuses on 2D junction examples, less on explicit 3D implementations.

46.7%

0.4

2022

[9] Advances in the study of ion trap structures in Quantum computation and simulation Wang Chen-Xu, ..., and Guo Guang-can Acta Physica Sinica 2022 - 1 citations - Show abstract - Cite 46.7% topic match

Reviews evolution and advances of ion trap structures for quantum computation. Includes discussions on high-performance three-dimensional ion trap systems. Highlights developments towards miniaturization, optical access, and system integration.

Reviews evolution and advances of ion trap structures for quantum computation. Includes discussions on high-performance three-dimensional ion trap systems. Highlights developments towards miniaturization, optical access, and system integration.

43.9%

1.4

2013

[10] Fabrication of a Monolithic Array of Three Dimensional Si-based Ion Traps P. See, ..., and A. Sinclair Journal of Microelectromechanical Systems 2013 - 16 citations - Show abstract - Cite 43.9% topic match

Demonstrates fabrication of 3D Si-based ion traps. Explores monolithic microchip arrays of 3D traps using common semiconductor techniques. Focuses on trap fabrication, not explicit on ion routing/shuttling in 3D.

Demonstrates fabrication of 3D Si-based ion traps. Explores monolithic microchip arrays of 3D traps using common semiconductor techniques. Focuses on trap fabrication, not explicit on ion routing/shuttling in 3D.

42.9%

0.0

2018

[11] 2 Simulation of Trapped Ion Dynamics Via Basis Functions 2 . 1 Justification of the Basis Function Technique D. Hucul and S. Olmschenk Journal Not Provided 2018 - 0 citations - Show abstract - Cite 42.9% topic match

Develops a theoretical framework for 3D ion shuttling. Focuses on shuttling ions through multidimensional junctions using electric fields. Mentions connections to experimental results in 2D, not explicitly 3D.

Develops a theoretical framework for 3D ion shuttling. Focuses on shuttling ions through multidimensional junctions using electric fields. Mentions connections to experimental results in 2D, not explicitly 3D.

41.0%

0.0

2015

[12] An ion trap of monolithic 3D structure for quantum information Dahyun Yum, ..., and Kihwan Kim 2015 11th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR) 2015 - 0 citations - Show abstract - Cite 41.0% topic match

Develops a 3D monolithic ion trap for quantum information. The trap combines features of 3D geometry and surface traps, measuring trap frequencies and heating rates. Successfully loaded Yb and Ba ions for future quantum experiments.

Develops a 3D monolithic ion trap for quantum information. The trap combines features of 3D geometry and surface traps, measuring trap frequencies and heating rates. Successfully loaded Yb and Ba ions for future quantum experiments.

39.6%

0.0

2009

[13] Three-Dimensional Array for Ca-40(+) Ion Trapping 万金银 and 刘亮 Journal Not Provided 2009 - 0 citations - Show abstract - Cite 39.6% topic match

Introduces a 3D scalable linear ion trap design. Utilizes finite element analysis for feasibility of radial and axial confinement. Focuses on ion trapping geometry and application potential, not explicit shuttling or routing of ions in 3D.

Introduces a 3D scalable linear ion trap design. Utilizes finite element analysis for feasibility of radial and axial confinement. Focuses on ion trapping geometry and application potential, not explicit shuttling or routing of ions in 3D.

38.5%

0.3

2009

[14] Three-dimensional lattice of ion traps K. Ravi, ..., and S. Rangwala Physical Review A 2009 - 4 citations - Show abstract - Cite - PDF 38.5% topic match

Proposes a 3D ion trap lattice design. Describes configuration suited for multi-ion experiments and quantum computing. Focuses on trap architecture, not specific shuttling or routing experiments.

Proposes a 3D ion trap lattice design. Describes configuration suited for multi-ion experiments and quantum computing. Focuses on trap architecture, not specific shuttling or routing experiments.

37.4%

0.0

2020

[15] High Fidelity Entangling Gates in a 3D Ion Crystal under Micromotion Y.-K. Wu, ..., and L. Duan Journal Not Provided 2020 - 0 citations - Show abstract - Cite - PDF 37.4% topic match

Develops entangling gates in 3D ion crystals. Uses numerical methods for ion equilibrium and micromotion in entangling gate design. Focuses on gate fidelity in a 3D setup, not specifically on routing/shuttling.

Develops entangling gates in 3D ion crystals. Uses numerical methods for ion equilibrium and micromotion in entangling gate design. Focuses on gate fidelity in a 3D setup, not specifically on routing/shuttling.

37.3%

6.3

2024

[16] Towards multiqudit quantum processor based on a $^{171}$Yb$^{+}$ ion string: Realizing basic quantum algorithms I. Zalivako, ..., and N. Kolachevsky Journal Not Provided 2024 - 3 citations - Show abstract - Cite - PDF 37.3% topic match

Demonstrates qudit-based quantum computing in a 3D trap. Uses a 3D linear Paul trap for high-fidelity qudit operations. Does not specifically discuss routing/shuttling ions in 3D.

Demonstrates qudit-based quantum computing in a 3D trap. Uses a 3D linear Paul trap for high-fidelity qudit operations. Does not specifically discuss routing/shuttling ions in 3D.

35.7%

0.6

2010

[17] Compact toroidal ion-trap design and optimization M. Madsen and C. Gorman Physical Review A 2010 - 8 citations - Show abstract - Cite - PDF 35.7% topic match

Introduces a compact toroidal ion-trap design. Optimizes trap design for precise 3D ion placement using static fields. Focuses more on trap design, lacks specifics on experimental 3D routing/shuttling.

Introduces a compact toroidal ion-trap design. Optimizes trap design for precise 3D ion placement using static fields. Focuses more on trap design, lacks specifics on experimental 3D routing/shuttling.

35.5%

0.0

2023

[18] “Shuttled” Ions Stay Quantum Erin M. Knutson Physics 2023 - 0 citations - Show abstract - Cite 35.5% topic match

Demonstrates shuttling of trapped-ion qubits without losing quantum properties. Focuses on preserving electronic coherence while moving ions between array sites. Lacks specific mention of 3D routing or shuttling techniques or experimental setups.

Demonstrates shuttling of trapped-ion qubits without losing quantum properties. Focuses on preserving electronic coherence while moving ions between array sites. Lacks specific mention of 3D routing or shuttling techniques or experimental setups.

34.8%

2.2

2021

[19] Trapped Ion Quantum Computing Using Optical Tweezers and Electric Fields. M. Mazzanti, ..., and A. Safavi-Naini Physical review letters 2021 - 7 citations - Show abstract - Cite - PDF 34.8% topic match

Proposes a scalable trapped ion quantum computing architecture. Utilizes optical tweezers and oscillating electric fields for qubit manipulation. Does not specifically address experimental 3D routing or shuttling of ions.

Proposes a scalable trapped ion quantum computing architecture. Utilizes optical tweezers and oscillating electric fields for qubit manipulation. Does not specifically address experimental 3D routing or shuttling of ions.

34.5%

None

[20] Towards Cycle-based Shuttling for Trapped-Ion Quantum Computers (Extended Abstract) Daniel Schoenberger, ..., and R. Wille Journal Not Provided None - 0 citations - Show abstract - Cite 34.5% topic match

Proposes a heuristic for efficient ion shuttling in QCCD. Focuses on scheduling shuttles to minimize decoherence in quantum states. Does not specifically mention or address three-dimensional shuttling.

Proposes a heuristic for efficient ion shuttling in QCCD. Focuses on scheduling shuttles to minimize decoherence in quantum states. Does not specifically mention or address three-dimensional shuttling.

34.1%

4.5

2009

[21] Demonstration of a scalable, multiplexed ion trap for quantum information processing D. Leibrandt, ..., and R. Slusher Quantum Inf. Comput. 2009 - 69 citations - Show abstract - Cite - PDF 34.1% topic match

Demonstrates a scalable, multiplexed ion trap technology. Focuses on trap design, scalability, and ion lifetimes with various elements. Does not specify three-dimensional routing or shuttling of ions.

Demonstrates a scalable, multiplexed ion trap technology. Focuses on trap design, scalability, and ion lifetimes with various elements. Does not specify three-dimensional routing or shuttling of ions.

33.2%

0.6

2021

[22] High-fidelity entangling gates in a three-dimensional ion crystal under micromotion Y.-K. Wu, ..., and L. Duan Physical Review A 2021 - 2 citations - Show abstract - Cite 33.2% topic match

Develops high-fidelity entangling gates in 3D ion crystals. Utilizes numerical methods for ion equilibrium and micromotion in entangling gate design. Focuses on theoretical gate fidelity in a 100-ion 3D crystal, not experimental 3D ion routing/shuttling.

Develops high-fidelity entangling gates in 3D ion crystals. Utilizes numerical methods for ion equilibrium and micromotion in entangling gate design. Focuses on theoretical gate fidelity in a 100-ion 3D crystal, not experimental 3D ion routing/shuttling.

33.1%

0.1

2009

[23] Three-Dimensional Array for 40Ca+ Ion Trapping J. Wan and Liu Liang Chinese Physics Letters 2009 - 2 citations - Show abstract - Cite 33.1% topic match

Presents a 3D ion trap design for 40Ca+ ions. Discusses a three-dimensional array with a linear trap configuration. Explores applications in quantum information processing and frequency standards.

Presents a 3D ion trap design for 40Ca+ ions. Discusses a three-dimensional array with a linear trap configuration. Explores applications in quantum information processing and frequency standards.

32.5%

0.0

2009

[24] Three-Dimensional Array for 40Ca+ Ion Trapping Wan Jin-Yin and Liu Liang Chinese Physics Letters 2009 - 0 citations - Show abstract - Cite 32.5% topic match

Introduces a 3D scalable linear ion trap structure. Describes trapping of 40Ca+ ions using nine parallel rods for radial and axial confinement. Utilizes finite element analysis for feasibility assessments but lacks details on routing or shuttling ions in 3D.

Introduces a 3D scalable linear ion trap structure. Describes trapping of 40Ca+ ions using nine parallel rods for radial and axial confinement. Utilizes finite element analysis for feasibility assessments but lacks details on routing or shuttling ions in 3D.

30.6%

1.6

2016

[25] Demonstration of a programmable quantum computer module S. Debnath, ..., and C. Monroe Journal Not Provided 2016 - 13 citations - Show abstract - Cite 30.6% topic match

Demonstrates a programmable trapped-ion quantum computer module. Implemented quantum algorithms via software-configured sequences of universal quantum logic gates. Mentions potential scaling through ion shuttling, but lacks specificity on 3D routing/shuttling details.

Demonstrates a programmable trapped-ion quantum computer module. Implemented quantum algorithms via software-configured sequences of universal quantum logic gates. Mentions potential scaling through ion shuttling, but lacks specificity on 3D routing/shuttling details.

29.2%

2.0

2021

[26] A micro-optical module for multi-wavelength addressing of trapped ions M. Day, ..., and G. Marshall Quantum Science & Technology 2021 - 7 citations - Show abstract - Cite - PDF 29.2% topic match

28.5%

5.5

2011

[27] Near-ground-state transport of trapped-ion qubits through a multidimensional array R. B. Blakestad, ..., and D. Wineland Physical Review A 2011 - 72 citations - Show abstract - Cite - PDF 28.5% topic match

Demonstrates two-dimensional trapped-ion qubit transport. Achieved near-ground-state transport with reduced motional excitation in a Paul-trap array. Methods discussed could influence 3D designs, but study is explicitly 2D-focused.

Demonstrates two-dimensional trapped-ion qubit transport. Achieved near-ground-state transport with reduced motional excitation in a Paul-trap array. Methods discussed could influence 3D designs, but study is explicitly 2D-focused.

28.3%

1.6

2022

[28] Optimization and implementation of a surface-electrode ion trap junction Chi Zhang, ..., and J. Home New Journal of Physics 2022 - 4 citations - Show abstract - Cite - PDF 28.3% topic match

Describes design of a surface-electrode ion trap junction. Utilizes bi-objective optimization for electrode design, focusing on ion transport path improvement. Focuses on two-dimensional array implementations, not explicitly on three-dimensional routing or shuttling.

Describes design of a surface-electrode ion trap junction. Utilizes bi-objective optimization for electrode design, focusing on ion transport path improvement. Focuses on two-dimensional array implementations, not explicitly on three-dimensional routing or shuttling.

27.7%

0.0

2024

[29] Shuttling for Scalable Trapped-Ion Quantum Computers Daniel Schoenberger, ..., and R. Wille Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 27.7% topic match

Proposes a heuristic for efficient ion shuttling schedules in QCCD. Focuses on minimizing the time steps of ion movement to reduce decoherence. Does not specifically address 3D shuttling mechanics or experimental results.

Proposes a heuristic for efficient ion shuttling schedules in QCCD. Focuses on minimizing the time steps of ion movement to reduce decoherence. Does not specifically address 3D shuttling mechanics or experimental results.

27.6%

3.2

2007

[30] Integrated optical approach to trapped ion quantum computation Jungsang Kim and Changsoon Kim Quantum Inf. Comput. 2007 - 54 citations - Show abstract - Cite - PDF 27.6% topic match

Discusses integrated optical technologies for scalable quantum computing. Focuses on optical designs for qubit manipulation, preparation, and measurement. Lacks specific details on 3D routing or shuttling of trapped ions.

Discusses integrated optical technologies for scalable quantum computing. Focuses on optical designs for qubit manipulation, preparation, and measurement. Lacks specific details on 3D routing or shuttling of trapped ions.

25.0%

0.5

2022

[31] Geometries and fabrication methods for 3D printing ion traps A. Quinn, ..., and D. Allcock Journal Not Provided 2022 - 1 citations - Show abstract - Cite - PDF 25.0% topic match

Discusses fabrication methods for potentially improved 3D ion traps. Proposes 'trench' geometries combining 2D fabrication ease with 3D trapping benefits. Focuses on trap design and fabrication, not on experimental 3D shuttling or routing.

Discusses fabrication methods for potentially improved 3D ion traps. Proposes 'trench' geometries combining 2D fabrication ease with 3D trapping benefits. Focuses on trap design and fabrication, not on experimental 3D shuttling or routing.

24.3%

3.7

2021

[32] Muzzle the Shuttle: Efficient Compilation for Multi-Trap Trapped-Ion Quantum Computers Abdullah Ash-Saki, ..., and Swaroop Ghosh 2022 Design, Automation & Test in Europe Conference & Exhibition (DATE) 2021 - 10 citations - Show abstract - Cite - PDF 24.3% topic match

Proposes compiler optimizations for multi-trap trapped-ion systems. Significantly reduces the number of shuttle operations between traps, enhancing program fidelity. Focuses on compilation and fidelity improvement rather than detailing 3D shuttling mechanics.

Proposes compiler optimizations for multi-trap trapped-ion systems. Significantly reduces the number of shuttle operations between traps, enhancing program fidelity. Focuses on compilation and fidelity improvement rather than detailing 3D shuttling mechanics.

23.0%

15.6

2009

[33] Complete Methods Set for Scalable Ion Trap Quantum Information Processing J. Home, ..., and D. Wineland Science 2009 - 235 citations - Show abstract - Cite - PDF 23.0% topic match

Showcases scalable quantum computing with trapped atomic ions. Details qubit transport over macroscopic distances without performance loss. Utilizes 9Be+ and 24Mg+ ions but does not specify 3D routing.

Showcases scalable quantum computing with trapped atomic ions. Details qubit transport over macroscopic distances without performance loss. Utilizes 9Be+ and 24Mg+ ions but does not specify 3D routing.

21.0%

0.4

2015

[34] Blueprint for a microwave trapped ion quantum computer B. Lekitsch, ..., and Winfried Hensinger Science Advances 2015 - 4 citations - Show abstract - Cite - PDF 21.0% topic match

Proposes a scalable trapped ion quantum computer architecture. Details ion transport between modules using long-wavelength radiation quantum gates. Does not specify 3-dimensional routing or shuttling explicitly.

Proposes a scalable trapped ion quantum computer architecture. Details ion transport between modules using long-wavelength radiation quantum gates. Does not specify 3-dimensional routing or shuttling explicitly.

20.6%

4.4

2023

[35] Multi-site Integrated Optical Addressing of Trapped Ions Joonhyuk Kwon, ..., and H. McGuinness Journal Not Provided 2023 - 4 citations - Show abstract - Cite - PDF 20.6% topic match

Demonstrates optical addressing in trapped-ion systems. Utilizes waveguides and splitters for controlling multiple ions at distinct sites. Focuses on 2D ion trap, not explicitly on 3D routing or shuttling.

Demonstrates optical addressing in trapped-ion systems. Utilizes waveguides and splitters for controlling multiple ions at distinct sites. Focuses on 2D ion trap, not explicitly on 3D routing or shuttling.

20.5%

0.4

2019

[36] Versatile surface ion trap for effective cooling and large-scale trapping of ions. Xinfang Zhang, ..., and Pingxing Chen arXiv: Atomic Physics 2019 - 2 citations - Show abstract - Cite 20.5% topic match

Proposes a novel surface ion trap design. The design facilitates rotational cooling and large-scale trapping via a unique chip layout. Focuses on ion cooling, trapping scalability, and shuttling between zones, but doesn't specify 3D routing.

Proposes a novel surface ion trap design. The design facilitates rotational cooling and large-scale trapping via a unique chip layout. Focuses on ion cooling, trapping scalability, and shuttling between zones, but doesn't specify 3D routing.

19.8%

1.9

2024

[37] Integrated photonic structures for photon-mediated entanglement of trapped ions F. Knollmann, ..., and Sandia National Laboratories Journal Not Provided 2024 - 1 citations - Show abstract - Cite - PDF 19.8% topic match

Provides analysis of photon collection in ion-trap structures. Discusses integrated photonic elements for entanglement via photon-mediated interactions. Does not specifically address 3D routing or shuttling of ions.

Provides analysis of photon collection in ion-trap structures. Discusses integrated photonic elements for entanglement via photon-mediated interactions. Does not specifically address 3D routing or shuttling of ions.

19.6%

2.9

2022

[38] Toward systematic architectural design of near-term trapped ion quantum computers Prakash Murali, ..., and M. Martonosi Communications of the ACM 2022 - 7 citations - Show abstract - Cite Abstract: Trapped ions (TIs) are a leading candidate for building Noisy Intermediate-Scale Quantum (NISQ) hardware. TI qubits have fundamental advantages over other technologies, featuring high qubit quality, coherence time, and qubit connectivity. However, current TI systems are small in size and typically use a single trap architecture, which has fundamental scalability limitations. To progress toward the next major milestone of 50--100 qubit TI devices, a modular architecture termed the Quantum Charge Coupled Device (QCCD) has been proposed. In a QCCD-based TI device, small traps are connected through ion shuttling. While the basic hardware components for such devices have been demonstrated, building a 50--100 qubit system is challenging because of a wide range of design possibilities for trap sizing, communication topology, and gate implementations and the need to match diverse application resource requirements. Toward realizing QCCD-based TI systems with 50--100 qubits, we perform an extensive application-driven architectural study evaluating the key design choices of trap sizing, communication topology, and operation implementation methods. To enable our study, we built a design toolflow, which takes a QCCD architecture's parameters as input, along with a set of applications and realistic hardware performance models. Our toolflow maps the applications onto the target device and simulates their execution to compute metrics such as application run time, reliability, and device noise rates. Using six applications and several hardware design points, we show that trap sizing and communication topology choices can impact application reliability by up to three orders of magnitude. Microarchitectural gate implementation choices influence reliability by another order of magnitude. From these studies, we provide concrete recommendations to tune these choices to achieve highly reliable and performant application executions. With industry and academic efforts underway to build TI devices with 50-100 qubits, our insights have the potential to influence QC hardware in the near future and accelerate the progress toward practical QC systems. 19.6% topic match

19.4%

2.1

2024

[39] Multi-zone trapped-ion qubit control in an integrated photonics QCCD device C. Mordini, ..., and Jonathan Home Journal Not Provided 2024 - 1 citations - Show abstract - Cite - PDF 19.4% topic match

Demonstrates ion transport in a photonic ion trap system. Achieves multi-zone operation and low optical crosstalk in two zones. Focuses on 2D shuttling; does not explicitly cover 3D routing or shuttling.

Demonstrates ion transport in a photonic ion trap system. Achieves multi-zone operation and low optical crosstalk in two zones. Focuses on 2D shuttling; does not explicitly cover 3D routing or shuttling.

19.3%

0.6

2023

[40] Next-generation trapped-ion quantum computing system A. Kozhanov, ..., and Christopher Monroe Optica Quantum 2.0 Conference and Exhibition 2023 - 1 citations - Show abstract - Cite 19.3% topic match

18.8%

0.0

2019

[41] Improved high-fidelity transport of trapped-ion qubits through a multi-dimensional array R. B. Blakestad, ..., and D. Wineland Journal Not Provided 2019 - 0 citations - Show abstract - Cite 18.8% topic match

Demonstrates 2D trapped-ion qubit transport with high fidelity. Discusses mitigating mechanisms for motional excitation and introduces energy exchange methods for cooling. While highly relevant to ion transport, it focuses on 2D rather than the required 3D transport.

Demonstrates 2D trapped-ion qubit transport with high fidelity. Discusses mitigating mechanisms for motional excitation and introduces energy exchange methods for cooling. While highly relevant to ion transport, it focuses on 2D rather than the required 3D transport.

18.5%

0.6

2022

[42] Comparison of spontaneous emission in trapped-ion multiqubit gates at high magnetic fields A. Carter, ..., and J. Bollinger Physical Review A 2022 - 1 citations - Show abstract - Cite - PDF 18.5% topic match

Analyzes decoherence in multiqubit gates using Penning traps. Focuses on spontaneous emission impacts at high magnetic fields in trapped ions. Lacks specific discussion on 3D shuttling or routing experimental methodologies.

Analyzes decoherence in multiqubit gates using Penning traps. Focuses on spontaneous emission impacts at high magnetic fields in trapped ions. Lacks specific discussion on 3D shuttling or routing experimental methodologies.

17.2%

0.1

2017

[43] Automated Positioning Control for Trapped-Ion Quantum Registers Janine Nicodemus Journal Not Provided 2017 - 1 citations - Show abstract - Cite Abstract: Trapped ions in a segmented Paul trap are a very promising candidate to implement a scalable quantum logic processor. To address individual ions and to perform two-qubit entanglement gates between specific ions we perform shuttling operations, such as movement of ions between memory and laser interaction zones, ion crystal separation and rearrangement of ions in linear strings. To perform multiple high fidelity quantum gates, these shuttling operations have to be carried out on short time scales (e.g. < 30μs) and with minimal induced motional excitation. In this thesis, two advances towards fast ion shuttling and high fidelity quantum gates are presented. First, the “Segmented Ion Trap CONtrol System” (SITCONS) software framework, which allows for an automated generation of optimized voltage waveforms for multi-qubit register shuttling, is introduced. During this work, the first version of the framework was completed and integrated in the experimental control software. The tool was successfully used to generate and test voltage ramps, to accomplish ion crystal separation and ion crystal transport along the trap axis. Automatically generated transport over multiple segments with low motional excitations was successfully demonstrated. The second goal of this work was to reduce the magnetic field fluctuations in the ion trap, in order to reduce the decoherence of our magnetic field sensitive 40Ca+ spin qubit, which in turn allows for higher quantum gate fidelities. To characterize the existing permanent magnet setup, a temperature sensor with a resolution of 0.01 ◦C was installed. In combination with these temperature measurements, a characterization of the long-term drifts of the qubit frequency was carried out. Comparisons of these measurements showed an almost perfect correlation between the reversible temperature drift of the permanent magnets and the frequency drift. Therefore, a second-generation permanent magnet setup was developed with the aim to significantly improve the stability of the quantizing magnetic field by reducing the effects of temperature drifts on the permanent magnets. Two counteracting permanent magnets, namely magnets made of Sm2Co17 and NdFeB, were utilized, to passively compensate the temperature induced drift of the magnetic field magnitude at the trapped ion location. As a result, the dependence of the magnetic field drift on the temperature could be reduced by about 60 %. Additionally, the overall temperature drift was substantially reduced via technical measures. In total, a tenfold reduction of the total qubit frequency drift in a long-term measurement (> 8 h) was achieved, which will be of significant importance for upcoming experiments with multiple high fidelity quantum operations. Randomized benchmarking was performed with the previous and improved permanent magnet setup to allow for a direct comparison and showed that mean single qubit gate fidelities after idle times could be significantly increased. For instance, the mean single qubit gate fidelity for 10 logic gate operations, with an idle time of 0.4 ms after each gate, could be increased from 97.3 % to 99.1 %. 17.2% topic match

16.7%

1.8

2021

[44] Motional Squeezing for Trapped Ion Transport and Separation. R. T. Sutherland, ..., and D. Leibfried Physical review letters 2021 - 6 citations - Show abstract - Cite - PDF 16.7% topic match

16.5%

17.5

2020

[45] Demonstration of the QCCD trapped-ion quantum computer architecture S. Moses, ..., and B. Neyenhuis arXiv: Quantum Physics 2020 - 77 citations - Show abstract - Cite - PDF 16.5% topic match

Demonstrates a 2D trapped-ion QCCD architecture for quantum computing. Employs Honeywell cryogenic surface trap for ion rearrangement and parallel gate operations. Focuses on 2D architecture and lacks explicit mention of 3D shuttling or routing.

Demonstrates a 2D trapped-ion QCCD architecture for quantum computing. Employs Honeywell cryogenic surface trap for ion rearrangement and parallel gate operations. Focuses on 2D architecture and lacks explicit mention of 3D shuttling or routing.

16.1%

0.0

2023

[46] How to Wire a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mn>1000</mml:mn></mml:math> -Qubit Trapped-Ion Quantum Computer M. Malinowski, ..., and C. Ballance PRX Quantum 2023 - 0 citations - Show abstract - Cite - PDF 16.1% topic match

16.0%

0.1

2009

[47] Ion trap simulation tools. Benjamin R. Hamlet https://doi.org/10.2172/983695 2009 - 2 citations - Show abstract - Cite 16.0% topic match

Introduces a software for ion trap simulations. Focuses on preparing and visualizing ion trapping and maneuvering simulations. Lacks explicit discussion on 3D routing/shuttling experimentation outcomes.

Introduces a software for ion trap simulations. Focuses on preparing and visualizing ion trapping and maneuvering simulations. Lacks explicit discussion on 3D routing/shuttling experimentation outcomes.

15.7%

1.3

2023

[48] Trapped Ion Quantum Computing using Optical Tweezers and the Magnus Effect M. Mazzanti, ..., and A. Safavi-Naini Journal Not Provided 2023 - 2 citations - Show abstract - Cite - PDF 15.7% topic match

Introduces quantum logic gate implementation in trapped ions. Utilizes optical tweezers exploiting the Magnus Effect for qubit-state dependent forces. Focuses on 2D plane couplings, not explicitly on 3D routing or shuttling of ions.

Introduces quantum logic gate implementation in trapped ions. Utilizes optical tweezers exploiting the Magnus Effect for qubit-state dependent forces. Focuses on 2D plane couplings, not explicitly on 3D routing or shuttling of ions.

15.4%

3.0

2008

[49] Scalable, high-speed measurement-based quantum computer using trapped ions. R. Stock and D. James Physical review letters 2008 - 48 citations - Show abstract - Cite - PDF 15.4% topic match

15.2%

2.6

2017

[50] High-Fidelity Preservation of Quantum Information During Trapped-Ion Transport. P. Kaufmann, ..., and C. Wunderlich Physical review letters 2017 - 19 citations - Show abstract - Cite - PDF 15.2% topic match

Demonstrates high-fidelity ion transport in a microstructured trap. Utilizes Ramsey spectroscopy to measure quantum state fidelity after transporting a ^{171}Yb^{+} ion. Transport occurs over a 280 μm distance but doesn't specify dimensional characteristics (1D, 2D, 3D).

Demonstrates high-fidelity ion transport in a microstructured trap. Utilizes Ramsey spectroscopy to measure quantum state fidelity after transporting a ^{171}Yb^{+} ion. Transport occurs over a 280 μm distance but doesn't specify dimensional characteristics (1D, 2D, 3D).

14.3%

0.9

2022

[51] A Shuttle-Efficient Qubit Mapper for Trapped-Ion Quantum Computers S. Upadhyay, ..., and Swaroop Ghosh Proceedings of the Great Lakes Symposium on VLSI 2022 2022 - 2 citations - Show abstract - Cite - PDF 14.3% topic match

13.9%

0.1

2013

[52] The development of microfabricated ion traps towards quantum information and simulation M. Hughes Journal Not Provided 2013 - 1 citations - Show abstract - Cite Abstract: Trapped ions within Paul traps have shown to be a promising architecture in the realisation of a quantum information processor together with the ability of providing quantum simulations. Linear Paul traps have demonstrated long coherence times with ions being well isolated from the environment, single and multi-qubit gates and the high fidelity detection of states. The scalability to large number of qubits, incorporating all the previous achievements requires an array of linear ion traps. Microfabrication techniques allow for fabrication and micron level accuracy of the trap electrode dimensions through photolithography techniques. The first part of this thesis presents the experiential setup and trapping of Yb+ ions needed to test large ion trap arrays. This include vacuum systems that can host advanced symmetric and asymmetric ion traps with up to 90 static voltage control electrodes. Demonstration of a single trapped Yb+ ion within a two-layer macroscopic ion trap is presented. with an ion-electrode distance of 310(10) μm. The anomalous heating rate and spectral noise density of the trap was measured, a main form of decoherence within ion traps. The second half of this thesis presents the design and fabrication of multi-layer asymmetric ion traps. This allows for isolated electrodes that cannot be accessed via surface pathways, allowing for higher density of electrodes as well as creating novel trap designs that allow for the potential of quantum simulations to be demonstrated. These include two-dimensional lattices and ring trap designs in which the isolated electrodes provide more control in the ion position. For the microfabrication of these traps I present a novel high-aspect ratio electroplated electrode design that provides shielding of the dielectric layer. This provides a means to mitigate stray electric field due to charge build up on the dielectric surfaces. Electrical testing of the trap structures was performed to test bulk breakdown and surface flashover of the ion trap architectures. Results showed sufficient isolation between electrodes for both radio frequency and static breakdown. Surface flashover voltage measurements over the dielectric layer showed an improvement of more than double over previous results using a new fabrication technique. This will allow for more powerful ion trap chips needed for the next generation of microfabricated ion trap arrays for scalable quantum technologies. 13.9% topic match

13.2%

0.0

2019

[53] Multi-functional surface ion trap for effective cooling and large-scale trapping of ions. Xinfang Zhang, ..., and Pingxing Chen arXiv: Atomic Physics 2019 - 0 citations - Show abstract - Cite - PDF 13.2% topic match

13.1%

47.5

2021

[54] Compact Ion-Trap Quantum Computing Demonstrator Ivan Pogorelov, ..., and T. Monz PRX Quantum 2021 - 166 citations - Show abstract - Cite - PDF 13.1% topic match

Describes a compact ion-trap quantum computing setup. Utilizes a linear Paul trap for optical qubits, focusing on integration and automation. Does not specifically address 3D routing or shuttling of ions.

Describes a compact ion-trap quantum computing setup. Utilizes a linear Paul trap for optical qubits, focusing on integration and automation. Does not specifically address 3D routing or shuttling of ions.

13.0%

2.7

2018

[55] Generation and stabilization of entangled coherent states for the vibrational modes of a trapped ion Zhi-Rong Zhong, ..., and Shi-Biao Zheng Physical Review A 2018 - 16 citations - Show abstract - Cite - PDF 13.0% topic match

Proposes a method for entangled states in 3D traps. Utilizes laser-driven ion motion in a three-dimensional anisotropic trap. Primarily focuses on state preparation, not on routing/shuttling dynamics.

Proposes a method for entangled states in 3D traps. Utilizes laser-driven ion motion in a three-dimensional anisotropic trap. Primarily focuses on state preparation, not on routing/shuttling dynamics.

12.8%

0.0

2022

[56] Realizing two-qubit gates through mode engineering on a trapped-ion quantum computer Ming Li, ..., and Y. Nam Journal Not Provided 2022 - 0 citations - Show abstract - Cite - PDF 12.8% topic match

12.7%

3.9

2006

[57] Transport dynamics of single ions in segmented microstructured Paul trap arrays R. Reichle, ..., and B. Usa Fortschritte der Physik 2006 - 70 citations - Show abstract - Cite - PDF 12.7% topic match

Introduces theoretical framework for ion transport in microstructured traps. Discusses relationship between classical and quantum transport descriptions, and energy transfer during transport. Focuses on 2D microstructured Paul trap arrays, not explicitly 3D routing/shuttling.

Introduces theoretical framework for ion transport in microstructured traps. Discusses relationship between classical and quantum transport descriptions, and energy transfer during transport. Focuses on 2D microstructured Paul trap arrays, not explicitly 3D routing/shuttling.

12.5%

9.9

2002

[58] Transport of quantum states and separation of ions in a dual RF ion trap M. Rowe, ..., and D. Wineland Quantum Inf. Comput. 2002 - 219 citations - Show abstract - Cite - PDF 12.5% topic match

Demonstrates ion transfer in a dual RF ion trap. Ion movement between two locations 1.2 mm apart with high efficiency and controlled coherence. Focus on two-dimensional ion dynamics, not explicitly three-dimensional routing or shuttling.

Demonstrates ion transfer in a dual RF ion trap. Ion movement between two locations 1.2 mm apart with high efficiency and controlled coherence. Focus on two-dimensional ion dynamics, not explicitly three-dimensional routing or shuttling.

12.4%

0.1

2008

[59] Kalte Ionenkristalle in einer segmentierten Paul-Falle Thomas Deuschle https://doi.org/10.18725/OPARU-1115 2008 - 1 citations - Show abstract - Cite Abstract: Laser-cooled ions in linear Paul Traps are one of the most promising candidates for a quantum computer. In order to scale up this approach to a larger number of ions, recent efforts have been concentrated on integrated arrays of linear Paul traps, an architecture for storage and processing of quantum information. In such segmented traps, ions can be stored and moved between distinct locations. However, performing a fast transport without gaining too much excess energy during the shuttling process is challenging. This thesis reports on the construction and operation of a segmented Paul trap. The trap was fabricated in UHV-compatible printed-circuit-board (PCB) technology and consists of 15 segments with a minimum segment width of 0,5 mm. With the large number of segments it is unique in Europe. Although a PCB-trap may not be suitable for large-scale quantum computers, the advantage of such a trap is fast and reliable fabrication with low fabrication costs. Therefore this technology is ideal for rapid testing of new trap geometries and ion shuttling methods. Experiments were carried out with individual laser-cooled Ca ions stored in the trap and observed by detecting their fluorescence. Measured trap frequencies agree to numerical simulations at the level of a few percent, demonstrating the fabrication accuracy of the segmented trap. Compensation voltages are used to cancel stray fields. The long time stability of these compensation voltages over many months is comparable to a conventional unsegmented trap. To determine the short time stability of the PCB-trap, the heating rate of the motional mode of an ion was measured by detecting fluoresence during Doppler cooling of heated ions. The observed heating rate was much higher than expected due to a massive deposition of calcium on the trap electrodes. Transport dynamics of a single trapped ion was investigated by shuttling the ion between trap locations 2mm apart. A non-adiabatic transport in roughly two oscillation periods in the axial trap potential was achieved. The quality of a transport function was evaluated with two different methods: the success probability and the excess energy of the ion after transport. The measurements were compared with numerical simulations of the classical energy transfer due to the transport. Finally, a string of ions held in a common trap was separated into two distinct traps. With the realization of the segmented PCB-trap and the presented experiments, the basis is laid for further experiments where the trap will be used for quantum information processing and as a deterministic single ion source. 12.4% topic match

12.3%

0.0

2019

[60] Quantum Computing using MAGIC with Trapped Atomic Ions I. Boldin, ..., and C. Wunderlich 2019 Conference on Lasers and Electro-Optics (CLEO) 2019 - 0 citations - Show abstract - Cite 12.3% topic match

Introduces MAGIC for ion interaction in quantum computing. Discusses transport of ions and a 2D ion array trap design. Does not address 3D routing or shuttling of trapped ions directly.

Introduces MAGIC for ion interaction in quantum computing. Discusses transport of ions and a 2D ion array trap design. Does not address 3D routing or shuttling of trapped ions directly.

12.2%

4.7

2020

[61] Quantum Gates on Individually-Addressed Atomic Qubits Subject to Noisy Transverse Motion M. Cetina, ..., and C. Monroe arXiv: Quantum Physics 2020 - 19 citations - Show abstract - Cite - PDF 12.2% topic match

11.8%

2.5

2022

[62] Automated Generation of Shuttling Sequences for a Linear Segmented Ion Trap Quantum Computer Jonathan Durandau, ..., and Y. B. Lauzière Quantum 2022 - 5 citations - Show abstract - Cite - PDF 11.8% topic match

Introduces algorithms for automated ion shuttling sequence generation. Focuses on sequencing for trapped-ion qubit sets in linear segmented traps. Lacks explicit discussion of 3D routing/shuttling, centering on linear trap structures.

Introduces algorithms for automated ion shuttling sequence generation. Focuses on sequencing for trapped-ion qubit sets in linear segmented traps. Lacks explicit discussion of 3D routing/shuttling, centering on linear trap structures.

11.5%

0.5

2011

[63] Single ion as a shot-noise-limited magnetic-field-gradient probe A. Walther, ..., and F. Schmidt-Kaler Physical Review A 2011 - 7 citations - Show abstract - Cite - PDF 11.5% topic match

11.3%

10.6

2016

[64] Trapped-Ion Quantum Logic with Global Radiation Fields. S. Weidt, ..., and W. Hensinger Physical review letters 2016 - 89 citations - Show abstract - Cite - PDF 11.3% topic match

Introduces a novel trapped-ion quantum computing method. Utilizes global radiation fields and individual voltage control for gate operations. Does not explicitly address 3D routing or shuttling of ions.

Introduces a novel trapped-ion quantum computing method. Utilizes global radiation fields and individual voltage control for gate operations. Does not explicitly address 3D routing or shuttling of ions.

10.5%

2.6

2020

[65] Ion Transport and Reordering in a 2D Trap Array Yong Wan, ..., and D. Leibfried Advanced Quantum Technologies 2020 - 11 citations - Show abstract - Cite 10.5% topic match

Demonstrates ion reordering in a 2D trap array. Shows low energy gain and maintained coherence during ion reordering process. Suggests potential for extension to 3D trapped-ion quantum processors.

Demonstrates ion reordering in a 2D trap array. Shows low energy gain and maintained coherence during ion reordering process. Suggests potential for extension to 3D trapped-ion quantum processors.

10.2%

37.4

2023

[66] A Race-Track Trapped-Ion Quantum Processor S. Moses, ..., and J. Pino Physical Review X 2023 - 46 citations - Show abstract - Cite - PDF 10.2% topic match

Introduces a race-track design for trapped-ion quantum computers. Focuses on a linear trap with a race-track shape, incorporating advanced technologies for scalability. Does not explicitly mention 3D routing or shuttling of ions.

Introduces a race-track design for trapped-ion quantum computers. Focuses on a linear trap with a race-track shape, incorporating advanced technologies for scalability. Does not explicitly mention 3D routing or shuttling of ions.

10.0%

0.3

2012

[67] Ion-photon quantum interface : entanglement engineering. M. Blain, ..., and D. Moehring https://doi.org/10.2172/1051703 2012 - 3 citations - Show abstract - Cite 10.0% topic match

9.8%

1.9

2020

[68] Trapped Ion Architecture for Multi‐Dimensional Quantum Simulations U. Warring, ..., and T. Schaetz Advanced Quantum Technologies 2020 - 8 citations - Show abstract - Cite 9.8% topic match

9.5%

0.3

2011

[69] Monolithic Microfabricated Symmetric Ion Trap for Quantum Information Processing Fayaz A. Shaikh, ..., and R. Slusher arXiv: Quantum Physics 2011 - 4 citations - Show abstract - Cite - PDF 9.5% topic match

9.3%

3.7

2001

[70] Sympathetic cooling of trapped Cd + isotopes Boris Blinov, ..., and Christopher Monroe Physical Review A 2001 - 83 citations - Show abstract - Cite - PDF Abstract: A collection of cold trapped ions offers one of the most promising avenues towards realizing a quantum computer @1‐4 #. Quantum information is stored in the internal states of individual trapped ions, while entangling quantum logic gates are implemented via a collective quantized mode of motion of the ion crystal. The internal qubit states can have extremely long coherence times @5#, but decoherence of the motion of the ion crystal may limit quantum logic gate fidelity @6#. Furthermore, when ions are nonadiabatically shuttled between different trapping regions for large-scale quantum computer schemes @4,7#, their motion must be recooled for subsequent logic operations. Direct laser cooling of the qubit ions is not generally possible without disturbing coherence of the internal qubit states. Instead, additional ‘‘refrigerator’’ ions in the crystal can be directly laser cooled, with the qubit ions cooled in sympathy by virtue of their Coulomb-coupled motion @8#. The laser cooling of the refrigerator ions can quench unwanted motion of the ion crystal, while not affecting the internal states of the qubit ions @4,9,10#. Sympathetic cooling has been observed in large ensembles of ions in Penning traps @8,11#, impurities in small collections of ion crystals, and in small ion crystals consisting of a single species, where strong laser focusing was required to access a particular ion without affecting the others @12#. Here, we report the first demonstration of sympathetic cooling in a small ion crystal with two different species where both species are independently optically addressed. We study sympathetic cooling of individual Cd 1 isotopes confined in a rf trap. One ion isotope~the refrigerator ion! is continuously Doppler-cooled by a laser beam red detuned from its D2 line ( S1/2-P3/2), while the other isotope ~the probe ion! is either Doppler cooled or Doppler heated by another beam, whose frequency is scanned around its D2 resonance line. The effect of the sympathetic cooling is to enable measuring fluorescence on the blue side of the probe ion’s resonance. Ordinarily, when the probe laser beam is tuned to the blue of the probe ion’s resonance, the ion ceases fluorescing due to Doppler heating, but the sympathetic cooling from the refrigerator ion keeps the probe ion cold and fluorescing regardless of the probe tuning. In the experiment, the probe ion is 112 Cd 1 , while the refrigerator ion is 114 Cd 1 ~both isotopes have zero nuclear spin!. The respective D2 lines of these two neighboring isotopes are separated by about 680 MHz, with the heavier ion at lower frequency, and the natural linewidth of each ion’s excited P3/2 state is g/2p.47 MHz. The experimental apparatus is schematically shown in Fig. 1. The Cd 1 D2 line resonant light near 214.5 nm is generated by quadrupling a Ti:sapphire laser. The laser is stabilized to a molecular tellurium feature near 429 nm to better than 1 MHz. The quadrupled UV output is split into two parts; one part is upshifted by ;420 MHz, while the 9.3% topic match

9.2%

0.3

2015

[71] Development of microfabricated ion traps for scalable microwave quantum technology B. Lekitsch Journal Not Provided 2015 - 3 citations - Show abstract - Cite Abstract: Microfabricated ion traps are an important tool in the development of scalable quantum systems. Tremendous advancements towards an ion quantum computer were made in the past decade and most requirements for a quantum computer have been fulfilled in individual experiments. Incorporating all essential capabilities in a fully scalable system will require the further advancement of established quantum information technologies and development of new trap fabrication techniques. In my thesis I will discuss the theoretical background and experimental setup required for the operation of ion traps. Measurement of the important ion trap heating rate was performed in the setup and I will discuss the results in more detail. I will give a review of microfabrication processes used for the fabrication of traps, outlining advantages, disadvantages and issues inherent to the processes. Following the review I will present my work on a concept for a scalable ion trap quantum system based on microwave quantum gates and shuttling through X-junctions. Many of the required building blocks, including ion trap structures with current-carrying wires intended to create strong magnetic field gradients for microwave gates were investigated further. A novel fabrication process was developed to combine current-carrying wires with advanced multilayered ion trap structures. Several trap designs intended for proof of principle experiments of high fidelity microwave gates, advanced detection techniques and shuttling between electrically disconnected ion traps will be presented. Also the electrode geometry of an optimized X-junction design with strongly suppressed rf barrier height will be presented. Further, I developed several modifications for the experimental setup to extend the existing capabilities. A plasma source capable of performing in-situ cleans of the trap electrode surfaces, which has been demonstrated to dramatically reduce the heating rate in ion traps, was incorporated. I will also present a vacuum system modification designed to cool ion traps with current-carrying wires and transport the generated heat out of the vacuum system. In addition a novel low-noise, high-speed, multichannel voltage control system was developed by me. The device can be used in future experiments to precisely shuttle ions from one trapping zone to another and also to shuttle ions through ion trap junctions. Lastly I will outline the process optimization and microfabrication of my ion trap designs. A novel fabrication process which makes use of the extremely high thermal conductivity of diamond substrates and combines it with thick copper tracks embedded in the substrate was developed. Large currents will be passed through the wires creating a strong and controllable magnetic field gradient. Ion trap designs with isolated electrodes connected via buried wires can be placed on top of the current-carrying wires, allowing the most advanced electrode designs to be fabricated with current-carrying wires. 9.2% topic match

9.1%

6.7

2011

[72] Design, fabrication and experimental demonstration of junction surface ion traps D. Moehring, ..., and M. Blain New Journal of Physics 2011 - 89 citations - Show abstract - Cite - PDF 9.1% topic match

9.0%

1.5

2006

[73] A microfabricated surface-electrode ion trap in silicon J. Britton, ..., and D. Wineland arXiv: Quantum Physics 2006 - 28 citations - Show abstract - Cite - PDF 9.0% topic match

9.0%

0.0

2016

[74] Experiments Towards Mitigation of Motional Heating in Trapped Ion Quantum Information Processing A. Greene Journal Not Provided 2016 - 0 citations - Show abstract - Cite 9.0% topic match

8.9%

0.8

2023

[75] Scaling of entangling-gate errors in large ion crystals Wenhao He, ..., and Xiao-Ming Zhang Journal Not Provided 2023 - 1 citations - Show abstract - Cite - PDF 8.9% topic match

8.8%

4.0

2013

[76] Arbitrary waveform generator for quantum information processing with trapped ions. R. Bowler, ..., and J. Amini The Review of scientific instruments 2013 - 46 citations - Show abstract - Cite - PDF 8.8% topic match

8.5%

1.8

2018

[77] Surface trap with dc-tunable ion-electrode distance. Da An, ..., and H. Häffner The Review of scientific instruments 2018 - 11 citations - Show abstract - Cite - PDF 8.5% topic match

8.4%

4.9

2019

[78] Theory of robust multiqubit nonadiabatic gates for trapped ions Yotam Shapira, ..., and A. Stern Physical Review A 2019 - 23 citations - Show abstract - Cite - PDF 8.4% topic match

8.4%

1.0

2004

[79] Towards a scalable quantum computer/simulator based on trapped ions T. Schaetz, ..., and D. Wineland Applied Physics B 2004 - 19 citations - Show abstract - Cite 8.4% topic match

8.3%

5.3

2007

[80] Sideband cooling and coherent dynamics in a microchip multi-segmented ion trap S. Schulz, ..., and F. Schmidt-Kaler New Journal of Physics 2007 - 88 citations - Show abstract - Cite - PDF 8.3% topic match

Demonstrates ion shuttling in a novel microchip trap. Utilizes controllable dc electrodes for axial potential design, enabling shuttling. Focuses on ion trapping and cooling, not explicitly 3D routing.

Demonstrates ion shuttling in a novel microchip trap. Utilizes controllable dc electrodes for axial potential design, enabling shuttling. Focuses on ion trapping and cooling, not explicitly 3D routing.

8.2%

15.2

2012

[81] Coherent diabatic ion transport and separation in a multizone trap array. R. Bowler, ..., and D. Wineland Physical review letters 2012 - 184 citations - Show abstract - Cite - PDF 8.2% topic match

8.1%

6.4

2012

[82] Reliable transport through a microfabricated X-junction surface-electrode ion trap K. Wright, ..., and A. Harter New Journal of Physics 2012 - 75 citations - Show abstract - Cite - PDF 8.1% topic match

8.1%

1.2

2021

[83] Manipulating phonons of a trapped-ion system using optical tweezers Y. Teoh, ..., and R. Islam Physical Review A 2021 - 4 citations - Show abstract - Cite - PDF 8.1% topic match

Proposes a mechanism for manipulative control using optical tweezers. Describes programmable manipulation of phonon modes in trapped ions for quantum information processing (QIP). Lacks explicit discussion on 3D shuttling or routing of ions, focusing instead on phonon manipulation and potential applications in quantum computing.

Proposes a mechanism for manipulative control using optical tweezers. Describes programmable manipulation of phonon modes in trapped ions for quantum information processing (QIP). Lacks explicit discussion on 3D shuttling or routing of ions, focusing instead on phonon manipulation and potential applications in quantum computing.

8.0%

1.0

2014

[84] Cryogenic silicon surface ion trap M. Niedermayr, ..., and R. Blatt https://doi.org/10.1088/1367-2630/16/11/113068 2014 - 10 citations - Show abstract - Cite - PDF 8.0% topic match

7.9%

0.0

2023

[85] Trapped-ion quantum computing with integrated photonics R. Bushati, ..., and Johanna Zultak https://doi.org/10.1117/12.3008419 2023 - 0 citations - Show abstract - Cite 7.9% topic match

7.8%

3.2

2018

[86] Interference in a Prototype of a Two-Dimensional Ion Trap Array Quantum Simulator. F. Hakelberg, ..., and T. Schaetz Physical review letters 2018 - 18 citations - Show abstract - Cite - PDF 7.8% topic match

Demonstrates 2D ion trap array for quantum simulation. Operates a triangular array of three individually trapped ions, enabling coherent coupling. Focuses on 2D experimentation, not directly addressing 3D routing or shuttling of trapped ions.

Demonstrates 2D ion trap array for quantum simulation. Operates a triangular array of three individually trapped ions, enabling coherent coupling. Focuses on 2D experimentation, not directly addressing 3D routing or shuttling of trapped ions.

7.7%

2.2

2017

[87] Micromotion-enabled improvement of quantum logic gates with trapped ions A. Bermudez, ..., and Markus Müller New Journal of Physics 2017 - 16 citations - Show abstract - Cite - PDF 7.7% topic match

7.6%

0.0

2022

[88] Enhanced entangling gates and scalable multizone operations in surface traps with integrated photonics C. Mordini, ..., and J. Home 2022 IEEE International Conference on Quantum Computing and Engineering (QCE) 2022 - 0 citations - Show abstract - Cite 7.6% topic match

7.6%

0.0

2013

[89] Manipulation of Ions in Microscopic Surface-Electrode Ion Traps W. Wan 万, ..., and M. Feng 冯 Chinese Physics Letters 2013 - 0 citations - Show abstract - Cite 7.6% topic match

7.5%

0.0

2007

[90] Algorithms and Architectures for Quantum Computers I. Chuang, ..., and Kenan Diab Journal Not Provided 2007 - 0 citations - Show abstract - Cite 7.5% topic match

7.4%

5.7

2022

[91] Industrially microfabricated ion trap with 1 eV trap depth S. Auchter, ..., and Jonathan Home Quantum Science & Technology 2022 - 14 citations - Show abstract - Cite - PDF 7.4% topic match

7.4%

2.0

2006

[92] Monolithic microfabricated ion trap chip design for scaleable quantum processors M. Brownnutt, ..., and A. Sinclair New Journal of Physics 2006 - 35 citations - Show abstract - Cite 7.4% topic match

7.3%

4.7

2007

[93] Laserless trapped-ion quantum simulations without spontaneous scattering using microtrap arrays J. Chiaverini and W. Lybarger Physical Review A 2007 - 79 citations - Show abstract - Cite - PDF 7.3% topic match

7.1%

0.0

2022

[94] Phonon-mediated many-body quantum entanglement and logic gates in ion traps Teng Liu, ..., and L. Luo Acta Physica Sinica 2022 - 0 citations - Show abstract - Cite 7.1% topic match

7.0%

0.3

2002

[95] Transport of Quantum States and Separation of Ions in a Dual Rf Ion Trap * M. Rowe, ..., and D. J. Wineland Journal Not Provided 2002 - 7 citations - Show abstract - Cite 7.0% topic match

7.0%

0.0

2023

[96] Novel Ion Trap Junction Design for Transporting Qubits in a 2D Array G. Nop, ..., and D. Paudyal Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 7.0% topic match

6.9%

0.5

2012

[97] Ytterbium ion trapping and microfabrication of ion trap arrays R. C. Sterling Journal Not Provided 2012 - 6 citations - Show abstract - Cite Abstract: Over the past 15 years ion traps have demonstrated all the building blocks required of a quantum computer. Despite this success, trapping ions remains a challenging task, with the requirement for extensive laser systems and vacuum systems to perform operations on only a handful of qubits. To scale these proof of principle experiments into something that can outperform a classical computer requires an advancement in the trap technologies that will allow multiple trapping zones, junctions and utilize scalable fabrication technologies. I will discuss the construction of an ion trapping experiment, focussing on my work towards the laser stabilization and ion trap design but also covering the experimental setup as a whole. The vacuum system that I designed allows the mounting and testing of a variety of ion trap chips, with versatile optical access and a fast turn around time. I will also present the design and fabrication of a microfabricated Y junction and a 2- dimensional ion trap lattice. I achieve a suppression of barrier height and small variation of secular frequency through the Y junction, aiding to the junctions applicability to adiabatic shuttling operations. I also report the design and fabrication of a 2-D ion trap lattice. Such structures have been proposed as a means to implement quantum simulators and to my knowledge is the first microfabricated lattice trap. Electrical testing of the trap structures was undertaken to investigate the breakdown voltage of microfabricated structures with both static and radio frequency voltages. The results from these tests negate the concern over reduced rf voltage breakdown and in fact demonstrates breakdown voltages significantly above that typically required for ion trapping. This may allow ion traps to be designed to operate with higher voltages and greater ion-electrode separations, reducing anomalous heating. Lastly I present my work towards the implementation of magnetic fields gradients and microwaves on chip. This may allow coupling of the ions internal state to its motion using microwaves, thus reducing the requirements for the use of laser systems. 6.9% topic match

6.8%

5.9

2018

[98] Chip-Integrated Voltage Sources for Control of Trapped Ions J. Stuart, ..., and J. Chiaverini Physical Review Applied 2018 - 34 citations - Show abstract - Cite - PDF 6.8% topic match

6.8%

0.0

2023

[99] Ion shuttling based on accurate potential control technology Mengliang Xu, ..., and Ping-xing Chen https://doi.org/10.1117/12.3007674 2023 - 0 citations - Show abstract - Cite 6.8% topic match

6.8%

0.0

2020

[100] Design and fabrication of ion traps for a scalable microwave quantum computer Weikang Fan Journal Not Provided 2020 - 0 citations - Show abstract - Cite 6.8% topic match

6.5%

4.1

2013

[101] Controlling the transport of an ion: classical and quantum mechanical solutions H. Fürst, ..., and Christiane P. Koch New Journal of Physics 2013 - 43 citations - Show abstract - Cite - PDF 6.5% topic match

6.5%

0.0

2024

[102] Realization of a chip-based hybrid trapping setup for $^{87}$Rb atoms and Yb$^{+}$ Ion crystals Abasalt Bahrami and Ferdinand Schmidt-Kaler Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 6.5% topic match

6.4%

1.4

2002

[103] Encoded recoupling and decoupling: An alternative to quantum error-correcting codes applied to trapped-ion quantum computation Daniel A. Lidar and L.-A. Wu Physical Review A 2002 - 30 citations - Show abstract - Cite - PDF 6.4% topic match

6.4%

15.3

2019

[104] Shuttling-based trapped-ion quantum information processing V. Kaushal, ..., and U. Poschinger AVS Quantum Science 2019 - 71 citations - Show abstract - Cite - PDF 6.4% topic match

6.3%

0.0

2006

[105] The Design and Implementation of Atomic Ion Shuttling Protocols in a Multi-dimensional Ion Trap Array M. Yeo Journal Not Provided 2006 - 0 citations - Show abstract - Cite 6.3% topic match

6.3%

0.7

2011

[106] Surface-electrode ion traps for scalable quantum computing D. Allcock Journal Not Provided 2011 - 10 citations - Show abstract - Cite Abstract: The major challenges in trapped-ion quantum computation are to scale up few-ion experiments to many qubits and to improve control techniques so that quantum logic gates can be carried out with higher fidelities. This thesis reports experimental progress in both of these areas. In the early part of the thesis we describe the fabrication of a surface-electrode ion trap, the development of the apparatus and techniques required to operate it and the successful trapping of 40 Ca + ions. Notably we developed methods to control the orientation of the principal axes and to minimise ion micromotion. We propose a repumping scheme that simplifies heating rate measurements for ions with low-lying D levels, and use it to characterise the electric field noise in the trap. Surface-electrode traps are important because they offer a route to dense integration of electronic and optical control elements using existing microfabrication technology. We explore this scaling route by testing a series of three traps that were microfabricated at Sandia National Laboratories. Investigations of micromotion and charging of the surface by laser beams were carried out and improvements to future traps are suggested. Using one of these traps we also investigated anomalous electrical noise from the electrode surfaces and discovered that it can be reduced by cleaning with a pulsed laser. A factor of two decrease was observed; this represents the first in situ removal of this noise source, an important step towards higher gate fidelities. In the second half of the thesis we describe the design and construction of an experiment for the purpose of replacing laser-driven multi-qubit quantum logic gates with microwave-driven ones. We investigate magnetic-field-independent hyperfine qubits in 40 Ca + as suitable qubits for this scheme. We make a design study of how best to integrate an ion trap with the microwave conductors required to implement the gate and propose a novel integrated resonant structure. The trap was fabricated and ions were successfully loaded. Single-qubit experiments show that the microwave fields above the trap are in excellent agreement with software simulations. There are good prospects for demonstrating a multi-qubit gate in the near future. We conclude by discussing the possibilities for larger-scale quantum computation by combining microfabricated traps and microwave control. 6.3% topic match

6.2%

0.0

2002

[107] First steps toward a multiplexed trapped ion quantum processor Demarco, ..., and Wineland Quantum Electronics and Laser Science Conference 2002 - 1 citations - Show abstract - Cite 6.2% topic match

6.2%

1.7

2022

[108] Angle-robust two-qubit gates in a linear ion crystal Zhubing Jia, ..., and K. Brown Physical Review A 2022 - 3 citations - Show abstract - Cite - PDF 6.2% topic match

6.1%

0.2

2013

[109] Manipulation of Ions in Microscopic Surface-Electrode Ion Traps Wang Wei, ..., and F. Mang Chinese Physics Letters 2013 - 2 citations - Show abstract - Cite 6.1% topic match

6.0%

0.1

2010

[110] Three-dimensional magnetic trap lattice on an atom chip with an optically induced fictitious magnetic field Hui Yan Physical Review A 2010 - 2 citations - Show abstract - Cite 6.0% topic match

5.9%

0.1

2017

[111] Design and performance evaluation of a novel square ion trap with mass analysis in the radial a axial directions Yuzhuo Wang, ..., and Hualei Xu Instrumentation Science & Technology 2017 - 1 citations - Show abstract - Cite 5.9% topic match

5.9%

0.7

2023

[112] Ion trap quantum computing using integrated photonics K. Mehta, ..., and J. Home https://doi.org/10.1117/12.2655382 2023 - 1 citations - Show abstract - Cite 5.9% topic match

5.9%

0.1

2015

[113] Scalable trap technology for quantum computing with ions A. Eltony Journal Not Provided 2015 - 1 citations - Show abstract - Cite 5.9% topic match

5.9%

0.7

2012

[114] Quantum gates, sensors, and systems with trapped ions Shannon X. Wang Journal Not Provided 2012 - 9 citations - Show abstract - Cite Abstract: Quantum information science promises a host of new and useful applications in communication, simulation, and computational algorithms. Trapped atomic ions are one of the leading physical systems with potential to implement a large-scale quantum information system, but many challenges still remain. This thesis describes some experimental approaches to address several such challenges broadly organized under three themes: gates, sensors, and systems. Quantum logic gates are the fundamental building blocks for quantum algorithms. Although they have been demonstrated with trapped ions previously, scalability requires miniaturizing ion traps by using a surface-electrode geometry. Using a single ion in a surface-electrode trap, we perform a two-qubit entangling gate and fully characterize it via quantum process tomography, as an initial validation of surface-electrode ion traps for quantum information processing. Good logic gates are often good sensors for fast fluctuations and energy changes in their environment. Trapped ions are sensitive to fluctuating and static charges, leading to motional state decoherence (heating) and instabilities, problems exacerbated by the surfaceelectrode geometry. We investigate the material dependence of heating, specifically with aluminum and superconducting traps, to elucidate the physical origin of these fluctuating charges. Static charging is hypothesized to be caused by the trapping and cooling lasers due to the photoelectric effect. We perform systematic experiments with aluminum, gold, and copper traps with lasers at various wavelengths to validate this hypothesis. Realizing quantum processors at the system level requires models and tools for predicting system performance, demonstration of good classical and quantum control, and techniques for integrating different quantum systems. We develop a modeling system for trapped ion quantum computing experiments and simulate the effect of physical and technical noise sources on practical realizations of quantum algorithms in a trapped ion system. We experimentally demonstrate several such algorithms, including the quantum Fourier transform, order-finding, and Shor's algorithm on up to 5 ions. These experiments highlight several unique advantages of ion trap systems and help identify needs for further development. Finally, we explore the integration of ion traps with optical elements including mirrors and photon detectors as key elements in creating future hybrid quantum systems. Thesis Supervisor: Isaac L. Chuang Title: Professor of Physics Professor of Electrical Engineering and Computer Science 5.9% topic match

5.8%

0.0

2019

[115] TWO-ELECTRODE DESIGN FOR ELECTROSTATIC ION TRAP INTEGRABLE IN POLAR COORDINATES K. Solovyev and M. Vinogradova Journal Not Provided 2019 - 0 citations - Show abstract - Cite 5.8% topic match

5.8%

0.2

2013

[116] Adiabatic ION Shuttling Protocols in Outer-Segmented-Electrode Surface ION Traps A. H. Nizamani, ..., and H. Saleem Journal Not Provided 2013 - 2 citations - Show abstract - Cite 5.8% topic match

5.7%

5.2

2014

[117] Ball-grid array architecture for microfabricated ion traps N. Guise, ..., and D. Youngner arXiv: Atomic Physics 2014 - 50 citations - Show abstract - Cite - PDF 5.7% topic match

5.7%

2.3

2019

[118] Scalable quantum computing stabilised by optical tweezers on an ion crystal Yu Shen and Guin-Dar Lin New Journal of Physics 2019 - 11 citations - Show abstract - Cite - PDF 5.7% topic match

5.7%

0.0

2010

[119] New Journal of Physics Toward scalable ion traps for quantum information processing J. Amini, ..., and D. Wineland Journal Not Provided 2010 - 0 citations - Show abstract - Cite 5.7% topic match

5.7%

0.3

2018

[120] Towards high-fidelity microwave driven multi-qubit gates on microfabricated surface ion traps T. Navickas Journal Not Provided 2018 - 2 citations - Show abstract - Cite 5.7% topic match

5.6%

3.3

2007

[121] A Two-dimensional Lattice Ion Trap for Quantum Simulation R. Clark, ..., and I. Chuang Bulletin of the American Physical Society 2007 - 58 citations - Show abstract - Cite - PDF Abstract: Quantum simulations of spin systems could enable the solution of problems that otherwise require infeasible classical resources. Such a simulation may be implemented using a well-controlled system of effective spins, such as a two-dimensional lattice of locally interacting ions. We propose here a layered planar rf trap design that can be used to create arbitrary two-dimensional lattices of ions. The design also leads naturally to ease of microfabrication. As a first experimental demonstration, we confine S88r+ ions in a millimeter-scale lattice trap and verify numerical models of the trap by measuring the motional frequencies. We also confine 440 nm diameter charged microspheres and observe ion-ion repulsion between ions in neighboring lattice sites. Our design, when scaled to smaller ion-ion distances, is appropriate for quantum simulation schemes, e.g., that of Porras and Cirac [Phys. Rev. Lett. 92, 207901 (2004)]. We note, however, that in practical realizations of the trap, an increase in the secular frequency with decreasing ion spacing may make a coupling rate that is large relative to the decoherence rate in such a trap difficult to achieve.Quantum simulations of spin systems could enable the solution of problems that otherwise require infeasible classical resources. Such a simulation may be implemented using a well-controlled system of effective spins, such as a two-dimensional lattice of locally interacting ions. We propose here a layered planar rf trap design that can be used to create arbitrary two-dimensional lattices of ions. The design also leads naturally to ease of microfabrication. As a first experimental demonstration, we confine S88r+ ions in a millimeter-scale lattice trap and verify numerical models of the trap by measuring the motional frequencies. We also confine 440 nm diameter charged microspheres and observe ion-ion repulsion between ions in neighboring lattice sites. Our design, when scaled to smaller ion-ion distances, is appropriate for quantum simulation schemes, e.g., that of Porras and Cirac [Phys. Rev. Lett. 92, 207901 (2004)]. We note, however, that in practical realizations of the trap, an increase in the secular ... 5.6% topic match

5.6%

0.1

2017

[122] Integrated Visible Photonics for Trapped-Ion Quantum Computing D. Kharas, ..., and J. Chiaverini Journal Not Provided 2017 - 1 citations - Show abstract - Cite 5.6% topic match

5.6%

3.4

2021

[123] Design, fabrication and characterization of a micro-fabricated stacked-wafer segmented ion trap with two X-junctions C. Decaroli, ..., and J. Home Quantum Science & Technology 2021 - 12 citations - Show abstract - Cite 5.6% topic match

5.6%

0.0

2015

[124] Microfabricated Paul traps for levitating and shuttling of ions and charged particles H. Rattanasonti Journal Not Provided 2015 - 0 citations - Show abstract - Cite Abstract: Trapped ions in Paul traps (radio frequency ion traps) are a promising candidate for the realization of a quantum computer. To date, experimental demonstrations of quantum computing and information processing with trapped ions have been limited to small numbers of quantum bits (qubits). The most prominent challenge to realise ion-trap quantum computation is to scale the system and control a large number of trapped ions coherently. Surface-electrode ion trap designs which are amenable to various microfabrication techniques offer a path to achieve this. In this work, design, fabrication and key operations of two types of surface-electrode ion traps, i.e. a Y-junction trap and a two-dimensional (2D) hexagonal lattice trap developed towards scaling ion-trap architectures, are presented. The steps involved in the fabrication of the ion-trap devices included photolithography, wet etch (hydrofluoric acid etch) and dry etch (deep reactive ion and inductively coupled plasma etching), and metal evaporation. The devices were fabricated on SOI substrates with different buried oxide thicknesses (i.e. 5 µm and 10 µm) and different metals for the trap electrodes (i.e. gold and aluminium). An extremely high-breakdown voltage up to 1 kV was measured in vacuum for the SOI-built test devices with a 10 µm-thick buried oxide formed by oxide film-to-oxide film bonding process. This is attributed to the deep V-shaped undercut profile of the buried oxide layer which resulted in a large breakdown path length, and so mitigating surface breakdown effects. Owing to the V-shaped undercut profile, the surface breakdown voltage was improved by 15% for the devices fabricated on SOI substrates with a 10 µm-thick buried oxide. In the first experiment, the demonstration of ytterbium ( 174 Yb + ) ion trapping in the 2D hexagonal lattice trap is achieved with a relatively long lifetime of a laser-cooled ion up to 90 minutes and ≤ 5 minutes without cooling in ultra-high vacuum system. The 2D lattice trap design allows for reliable trapping of 2D ion lattices, rudimentary shuttling between lattice sites and deterministic introducing of defects into the ion lattice. Based on all these abilities, such a 2D lattice trap with the predicted reduction of lattice spacing down to 32 µm can be configured as a versatile architecture for 2D quantum simulations with trapped ions. In the second experiment, microparticle trapping in the 2D lattice trap, performed in air, is achieved with the longest trapping lifetime of 60 minutes. Both gold and aluminium-coated electrodes also lead to comparable trapping performances. Furthermore, the in situ levitation of microparticles is successfully demonstrated at the maximum levitation height of 30 µm. This ability provides additional control on the trapping height which increases the overall functionality of the 2D lattice trap. 5.6% topic match

5.5%

0.0

2007

[125] Investigation of the classically controlled ion-motion interface in a multiplexed ion-trap quantum computer Tzvetan S. Metodi, ..., and F. Chong https://doi.org/10.1117/12.720047 2007 - 0 citations - Show abstract - Cite 5.5% topic match

5.5%

1.4

2014

[126] High-fidelity quantum gates for trapped ions under micromotion Chao Shen and L. Duan Physical Review A 2014 - 14 citations - Show abstract - Cite - PDF 5.5% topic match

5.5%

0.0

2014

[127] Scalable Multiplexed Ion Trap Fabrication Using Ball Grid Arrays D. Youngner, ..., and A. Harter Journal Not Provided 2014 - 0 citations - Show abstract - Cite 5.5% topic match

5.4%

0.2

2020

[128] Ion transport and reordering in a two-dimensional trap array Y. Wan, ..., and D. Leibfried arXiv: Quantum Physics 2020 - 1 citations - Show abstract - Cite - PDF 5.4% topic match

5.4%

3.4

2022

[129] Quantum Circuit Compiler for a Shuttling-Based Trapped-Ion Quantum Computer Fabian Kreppel, ..., and A. Brinkmann ArXiv 2022 - 7 citations - Show abstract - Cite - PDF 5.4% topic match

5.3%

0.3

2012

[130] Architecture for a scalable ion-trap quantum computer M. Harlander Journal Not Provided 2012 - 4 citations - Show abstract - Cite 5.3% topic match

5.3%

0.0

2010

[131] Quantum Manipulations of Single Trapped-Ions beyond the Lamb-Dicke Limit Miao Zhang and L. F. Wei https://doi.org/10.5772/13625 2010 - 0 citations - Show abstract - Cite Abstract: An ion can be trapped in a small region in three dimensional space by the electromagnetic trap, and can be effectively manipulated by the applied laser pulses (1; 2; 3). The system of trapped ions driven by laser pulses provides a powerful platform to engineer quantum states (4; 5; 6; 7) and implement quantum information processings (QIPs) (8; 9; 10). Typically, manipulations and detections quantum information can be utilized to test certain fundamental principles (such as EPR and Shrödinger cat ”paradox”) in quantum mechanics and implement quantum computation, quantum telegraph, and quantum cryptography, etc.(see, e.g., (11; 12; 13; 14)). Up to now, several kinds of physical systems, e.g., cavity-QEDs (15), superconducting Josephson junctions (16), nuclear magnetic resonances (NMRs) (17), and coupled quantum dots (18), etc., have been proposed to physically implement the QIPs. The system of trapped ions is currently one of the most advanced models for implementing the QIPs, due to its relatively-long coherence time. Indeed, the coherent manipulations up to eight trapped ions had already been experimentally demonstrated (14). However, most of the quantum manipulations with the trapped cold ions are within the Lamb-Dicke (LD) approximation, e.g., the famous Cirac-Zoller model (8). Such an approximation requires that the coupling between the quantum bit (encoded by two atomic levels of a trapped ion) and the data bus (the collective vibration mode of the ions) should be sufficiently weak. Sometimes, the LD limits could be not rigorously satisfied for typical single trapped-ion system, and thus higher-order powers of the LD parameter must be taken into account (19). Alternatively, the laser-ion interaction beyond the LD approximation might be helpful to reduce the noise in the ion-trap and improve the cooling rate(see, e.g., (20; 21; 22)), and thus could be utilized to high-efficiently realize QIPs. In this chapter, we summarize our works (23; 24; 25; 26; 27; 28; 29; 30; 31) on how to design proper laser pulses for the desirable quantum-state engineerings with single trapped-ions, including the preparations of various typical quantum states of the data bus and the implementations of quantum logic gates beyond the LD approximation. The chapter is organized as: In Sec. 2 we derivate the dynamical evolutions of a single trapped ion (driven by a classical laser beam) with and beyond the LD approximation. Based on the quantum dynamics beyond the LD approximation, in Sec. 3, we discuss how to use a series of laser pulses to generate various vibrational quantum states of the trapped ion, e.g., coherence states, squeezed coherent states, squeezed odd/even coherent states and squeezed vacuum states, etc. We also present the approach (by properly setting the laser pulses) to realize control-NOT 4 5.3% topic match

5.2%

0.0

2014

[132] Integrated Diffractive Mirrors (IDM) Ion Traps) C. Volin https://doi.org/10.21236/ada606612 2014 - 0 citations - Show abstract - Cite 5.2% topic match

5.2%

4.6

2021

[133] Controlling long ion strings for quantum simulation and precision measurements F. Kranzl, ..., and C. Roos Physical Review A 2021 - 12 citations - Show abstract - Cite - PDF 5.2% topic match

5.1%

0.0

2024

[134] Non-Abelian vibron dynamics in trapped-ion arrays L. Timm, ..., and L. Santos Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 5.1% topic match

5.1%

1.8

2020

[135] Efficient-sideband-cooling protocol for long trapped-ion chains J.-S. Chen, ..., and Y. Nam Physical Review A 2020 - 8 citations - Show abstract - Cite - PDF 5.1% topic match

5.0%

0.6

2022

[136] Robust quantum control for higher order coupling term in trapped ions Jing-Bo Wang Journal Not Provided 2022 - 1 citations - Show abstract - Cite - PDF 5.0% topic match

5.0%

0.0

2020

[137] Improved description of trapped ions as an electro-mechanical system N. V. Horne and M. Mukherjee Journal Not Provided 2020 - 0 citations - Show abstract - Cite - PDF 5.0% topic match

5.0%

0.3

2013

[138] Sensitive, 3D micromotion compensation in a surface-electrode ion trap A. Eltony Journal Not Provided 2013 - 4 citations - Show abstract - Cite Abstract: Following successful demonstrations of quantum algorithms and error correction with a handful of trapped ions in a macroscopic, machined Paul trap, there is a growing effort to move towards microfabricated traps with all the electrodes on a single chip. These traps, known as surface-electrode ion traps, are more amenable to being shrunk in size and replicated, or integrated with optical components and electronic devices. However, in the shift towards surface-electrode traps, and as traps are miniaturized in general, laser beams are brought closer to electrode surfaces, exacerbating laser-induced charging. Because of their charge, trapped ions are extremely sensitive to stray charges that accumulate on the trap surface. The DC potentials caused by stray charge displace the ion from the null of the RF trapping field, resulting in a fast, driven motion of the ion (known as micromotion) which hinders quantum operations by broadening transitions and causing decoherence. In a surface trap, micromotion detection is difficult as the laser beams used for measurement typically cannot crash into the trap, obscuring ion offsets out of the trap plane. Existing methods for micromotion detection permit ion positioning accurate to the ground state wavepacket size (of order 10 nm), but cannot identify ion offsets out of the trap plane with the same accuracy. Schemes for sensitive compensation often have restrictive requirements such as access to a narrow atomic transition. We introduce a new approach, which permits out-of-plane micromotion compensation to within 10s of nanometers with minimal overhead. Our technique synchronously detects ion excitation along the trap axes when it is driven by secular-frequency sidebands added to the RF electrodes; the excitation amplitude is proportional to the offset from the RF null. We make a detailed theoretical comparison with other techniques for micromotion compensation and demonstrate our technique experimentally. Acknowledgments A great thanks to Professor Isaac Chuang for giving me the opportunity to work in the Quanta Group and explore this exciting field. His generosity with his time and knowledge have been a huge help to me. Under his guidance, I have learned a great deal about designing and realizing scientific experiments, technical communication, and even management. I have also gained immensely from interactions with Shannon Wang and Peter Herskind, who showed me the ropes of the cryogenic ion trapping experiment and introduced me to the lasers in lab during my first year in the group. This work would not have been possible without the … 5.0% topic match

4.9%

4.3

2020

[139] Scalable Arrays of Micro-Penning Traps for Quantum Computing and Simulation Shreyan Jain, ..., and J. Home Physical Review X 2020 - 17 citations - Show abstract - Cite 4.9% topic match

4.9%

4.5

2020

[140] TILT: Achieving Higher Fidelity on a Trapped-Ion Linear-Tape Quantum Computing Architecture Xin-Chuan Wu, ..., and F. Chong 2021 IEEE International Symposium on High-Performance Computer Architecture (HPCA) 2020 - 17 citations - Show abstract - Cite - PDF 4.9% topic match

4.9%

0.0

2023

[141] Progress towards a three-node ion-trap quantum network George Toh, ..., and C. Monroe https://doi.org/10.1117/12.2657155 2023 - 0 citations - Show abstract - Cite 4.9% topic match

4.8%

1.4

2018

[142] Operation of a Microfabricated Planar Ion‐Trap for Studies of a Yb+–Rb Hybrid Quantum System A. Bahrami, ..., and F. Schmidt-Kaler physica status solidi (b) 2018 - 8 citations - Show abstract - Cite - PDF 4.8% topic match

4.8%

1.5

2022

[143] Robust Two-Qubit Gates for Trapped Ions Using Spin-Dependent Squeezing. Yotam Shapira, ..., and R. Ozeri Physical review letters 2022 - 3 citations - Show abstract - Cite - PDF 4.8% topic match

4.8%

0.2

2006

[144] Quantum leap for quantum computing J. Minkel IEEE Spectrum 2006 - 4 citations - Show abstract - Cite 4.8% topic match

4.8%

0.0

2019

[145] Controlled inter-site coupling in a two-dimensional ion trap array F. Hakelberg Journal Not Provided 2019 - 0 citations - Show abstract - Cite Abstract: The understanding of quantum mechanical systems is essential to modern physics and its applications. However, already for entangled systems of a few tens of constituents, exact numerical simulations on classical computers can become impossible. Quantum simulators based on well-controlled quantum system might provide the only effective approach to these systems. Trapped atomic ions offer a uniquely precise and controllable platform. They are used as platforms for, e.g., future quantum computers, quantum simulators, and extremely precise clocks. Quantum-simulation problems of interest and out-of-reach for modern theoretical methods include the dynamics of one-dimensional systems on long time scales and more-than-one dimensional systems with long-range interaction. For the latter, two-dimensional arrays of ions, individually trapped and controlled above microfabricated surface-electrode traps, present a promising approach. In the first realizations so far, the inter-site distance between the ions was too large to allow for sufficient inter-site coupling. We aim for a scalable approach to an analog quantum simulator based on a two-dimensional array of individually trapped ions. As a first demonstration, we operate an array of three magnesium ions in triangular arrangement with a side-length of 40 μm. Therein, we previously demonstrated the individual control of internal (electronic) and external (motional) degrees of freedom of the ions. Here, we present the first realization of inter-site coupling in the two-dimensional array. We demonstrate the coupling by a transfer of large coherent states of motion between the sites. We investigate the influence of the amplitude of these motional states in the anharmonic trapping potential and extrapolate to future experiments on the single-phonon level. We apply the real-time control of the coupling and concatenate the two-site coupling to transfer motional excitation between all three sites of the array. To demonstrate the scalability of our techniques, we couple all three sites simultaneously and investigate the evolution of an initial excitation at one and two sites of the array. The latter shows interference effects of the different pathways in the triangle. Current motional heating rates on the order of the inter-site coupling, preclude working with single phonons near the motional ground-state. We present a new experimental apparatus and vacuum chamber which will allow in-situ cleaning of surface-electrode traps. This has shown to reduce motional heating rates by two orders of magnitude. In this apparatus, we additionally realize a magnetic-field insensitive qubit in 25Mg+ with a coherence time exceeding six seconds. We generate the magnetic field around 10.9 mT by a hybrid magnet assembly based on solid-state magnets and fine-tuned by electric coils. Once we have reduced the heating rate in the triangle trap array using the new setup, first quantum simulation experiments, investigating spin-frustration or artificial gauge fields, will come in reach. Here our triangle represents a basic, scalable, building block of future latices designed at will. 4.8% topic match

4.8%

0.0

2022

[146] Microfabricated Penning trap for quantum computation and simulation P. Hrmo, ..., and J. Home 2022 IEEE International Conference on Quantum Computing and Engineering (QCE) 2022 - 0 citations - Show abstract - Cite 4.8% topic match

4.7%

0.1

2011

[147] High-power ultrafast laser source with 300 MHz repetition rate for trapped-ion quantum logic A. Jechow, ..., and D. Kielpinski 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC) 2011 - 1 citations - Show abstract - Cite 4.7% topic match

4.7%

6.2

2009

[148] Optimal surface-electrode trap lattices for quantum simulation with trapped ions. R. Schmied, ..., and D. Leibfried Physical review letters 2009 - 96 citations - Show abstract - Cite - PDF 4.7% topic match

4.7%

0.0

2022

[149] Fast and high-yield fabrication of axially symmetric ion-trap needle electrodes via two step electrochemical etching. Nikhil Kotibhaskar, ..., and R. Islam The Review of scientific instruments 2022 - 0 citations - Show abstract - Cite - PDF 4.7% topic match

4.7%

146.7

2019

[150] Trapped-ion quantum computing: Progress and challenges C. Bruzewicz, ..., and J. Sage Applied Physics Reviews 2019 - 778 citations - Show abstract - Cite - PDF 4.7% topic match

4.7%

0.0

2021

[151] Laser-based manipulation and readout for multi-ion traps in quantum computing (Conference Presentation) E. Beckert, ..., and U. Zeitner https://doi.org/10.1117/12.2574608 2021 - 0 citations - Show abstract - Cite 4.7% topic match

4.6%

0.7

2020

[152] Versatile surface ion trap with fork junction for effective cooling Xinfang Zhang, ..., and Pingxing Chen Physica Scripta 2020 - 3 citations - Show abstract - Cite 4.6% topic match

4.6%

0.3

2021

[153] Design, fabrication and characterisation of a micro-fabricated double-junction segmented ion trap C. Decaroli, ..., and J. Home Journal Not Provided 2021 - 1 citations - Show abstract - Cite - PDF 4.6% topic match

4.6%

1.7

2021

[154] Ion shuttling method for long-range shuttling of trapped ions in MEMS-fabricated ion traps Minjae Lee, ..., and D. Cho Japanese Journal of Applied Physics 2021 - 6 citations - Show abstract - Cite 4.6% topic match

4.4%

1.2

2015

[155] Blueprint for a microwave ion trap quantum computer B. Lekitsch, ..., and W. Hensinger arXiv: Quantum Physics 2015 - 11 citations - Show abstract - Cite 4.4% topic match

4.4%

0.0

2004

[156] 04 07 02 0 v 2 13 J ul 2 00 4 Coupled ion-nanomechanical systems L. Tian and P. Zoller Journal Not Provided 2004 - 0 citations - Show abstract - Cite 4.4% topic match

4.4%

0.3

2006

[157] Theory and application of planar ion traps C. Pearson Journal Not Provided 2006 - 5 citations - Show abstract - Cite Abstract: In this thesis, we investigate a new geometry of Paul trap with electrodes in a plane. These planar ion traps are compatible with modern silicon microfabrication, and can be scaled up to large arrays with multiple trapping zones. We implement these designs on printed circuit boards with macroscopic ions, allowing us to study the traps while avoiding the experimental challenges of atomic ion traps. We discuss the dynamics of ions in the traps using both numerical and analytical means. Scalable traps are of interest to the quantum computing community as a potential implementation of a large scale quantum computer. However, there are concerns about the low trap depth relative to a conventional trap of the same size. We address this in three ways, first by introducing a conductive plane above the trap to increase its depth, then by using a deeper trap with a three dimensional electrode geometry to load the trap, and finally by loading the trap directly while using a buffer gas to slow down energetic ions so that the trap can capture them. Also of concern is the ability of the trap to move ions through arms and intersections. We demonstrate these movement operations, and study properties of the linear trap including the secular frequency and geometric factors between planar and four rod traps. The precision of atomic ion trap experiments makes them sensitive to background gas pressure at levels that are undetectable to conventional gauges. The capacity for integrating circuitry and optical elements with the trap could anticipate complete ion trap experiments performed by a single chip, and a new technology for an integrated pressure gauge would be immensely useful if the pressure detection can shown to be feasible and repeatable. In a point planar trap, we observe ion motion to determine background gas pressure, demonstrating an application that could bring planar ion traps into much wider use. Thesis Supervisor: Isaac L. Chuang Title: Associate Professor of Physics 4.4% topic match

4.3%

0.0

2023

[158] Research progress of ion trap quantum computing Yu-Kai Wu and Lu-Ming Duan Acta Physica Sinica 2023 - 0 citations - Show abstract - Cite 4.3% topic match

4.3%

0.0

2016

[159] Ju l 2 01 6 Integrated optical addressing of an ion qubit K. Mehta, ..., and J. Chiaverini Journal Not Provided 2016 - 0 citations - Show abstract - Cite 4.3% topic match

4.3%

0.3

2007

[160] The Trap Technique D. Stick, ..., and C. Monroe IEEE Spectrum 2007 - 5 citations - Show abstract - Cite 4.3% topic match

4.3%

0.3

2006

[161] Towards a cryogenic planar ion trap for Sr-88 W. Bakr Journal Not Provided 2006 - 5 citations - Show abstract - Cite Abstract: This thesis describes experiments with ion traps constructed with electrodes in a single two-dimensional plane, and ion traps operated in a cryogenic environment at 77K and 4K temperatures. These two technologies address needs which arise in developing potentially scalable approaches to quantum computing using trapped ions. Traps with electrodes in a plane are challenging to load because their trap depths are usually only of order one percent that of multi-level traps of comparable dimensions. In addition, ion heating rates in these traps are higher than in multi-level traps because of the close proximity of the electrodes that is required to achieve a reasonable trap depth and the relatively resistive semiconductor electrode materials used in planar traps fabricated with standard semiconductor lithography methods. We investigate planar traps using macroscopic ions, focusing on devising techniques for loading these shallow traps and designing electrode layouts for ion movement. Using traps fabricated lithographically with copper traces on fiberglass laminate, we trap linear chains of tens of charged particles of ~ 400nm diameter. We perform experiments to address concerns about the low trap depth of planar ion traps and develop control electrode layouts for moving ions between trap zones. Motivated by the desire to lower the heating rates in planar traps, we design and implement an experiment trapping Sr-88 ions in a knife-edge trap in a helium cryostat. The design challenges are obtaining a long hold-time of the cryogens, lowering the residual gas pressure and loading the trap using a technique compatible with the cryogenic environment. A novel loading technique we demonstrate successfully is laser ablation loading at 4K, employing a SrCl2 target. Laser cooling is applied to produce observations of ions, both in clouds transitioning into Wigner crystals, and of linear chains of up to 14 optically resolved single ions. These results set the stage for future experiments with a planar trap for Sr-88 ions designed to operate at 4K. Thesis Supervisor: Isaac L. Chuang Title: Associate Professor 4.3% topic match

4.3%

0.2

2012

[162] Background-free detection and mixed-species crystals in micro- and macroscopic ion-traps for scalable QIP N. Linke Journal Not Provided 2012 - 2 citations - Show abstract - Cite Abstract: Background-free detection and mixed-species crystals in microand macroscopic ion-traps for scalable QIP A thesis submitted for the degree of Doctor of Philosophy Michaelmas Term 2012 Norbert M. Linke New College, Oxford Scalability and the implementation of fault tolerant quantum gates are the two main challenges which must be overcome in order to unlock the vast potential of quantum computing. This thesis describes work with calcium ions trapped in both microscopic and macroscopic linear Paul traps addressing both of these issues. We describe the assembly of a microstructured multi-zone ion trap which forms part of our group’s contribution to the European “Microtrap” collaboration. We report the successful trapping of ions and characterization of the trap as well as a measurement of the heating rate. In miniaturized trap structures such as this one, background scattered light from the cooling beam causes difficulties. We introduce and demonstrate experimentally two techniques to overcome this problem. The first achieves background-free detection of ions using different repumping methods to enable the filtering out of the excitation wavelength. The second makes possible background-free readout of trapped ion qubits by separating in time the excitation and detection steps. The second half of the thesis describes our experimental efforts towards implementing a two-qubit entangling gate with a mixed-species crystal. We describe the setup and characterization of a new macroscopic trap including the trapping and coherent manipulation of the internal states of both 40Ca+ and 43Ca+ ions. We accomplish the simultaneous independent readout of two qubits implemented in a 40Ca+−43Ca+ ion pair. We also present the setup and characterization of two injection-locked frequency-doubled Raman lasers and demonstrate coherent manipulation as well as a measurement of the off-resonant photon scattering error they introduce. Finally, we use them to achieve sideband cooling to the motional ground state of a mixed species ion crystal. 4.3% topic match

4.3%

0.0

2022

[163] Advances in the study of ion trap structures in Quantum computation and simulation Chen-xu Wang, ..., and G. Guo Acta Physica Sinica 2022 - 0 citations - Show abstract - Cite 4.3% topic match

4.3%

0.5

2009

[164] Integrated chips and optical cavities for trapped ion quantum information processing D. Leibrandt Journal Not Provided 2009 - 8 citations - Show abstract - Cite Abstract: Quantum information processing is a new and exciting field which uses quantum mechanical systems to perform information processing. At the heart of the excitement are quantum computation which promises efficient algorithms for simulating physical systems, factoring, and searching unsorted databases and quantum communication which provides a provably secure communications protocol. Trapped ions show much promise for achieving large-scale quantum information processing. Experiments thus far have demonstrated small algorithms and entanglement of two remote ions. Current work focuses on scaling to large numbers of ions for quantum computation and interconversion between trapped ions and photons for quantum communication. This thesis addresses some of the challenges facing scaling and interconversion for trapped ion quantum information processing. The first part of the thesis describes the development of scalable, multiplexed ion trap chips for quantum computation. The ion trap chips are based on a new ion trap geometry, called the surface-electrode trap, in which all of the electrodes reside in a single plane. Three generations of surface-electrode traps are designed, fabricated, and tested culminating with the demonstration of an ion trap chip microfabricated using standard silicon VLSI materials and processes for scalability to small trap size and large arrays of interconnected ion traps. The second part of the thesis presents an experiment that demonstrates cavity cooling, a method of laser cooling the motional state of trapped ions without decohering the internal qubit state. Cavity cooling is demonstrated for the first time with trapped ions, and for the first time in the parameter regime where cooling to the motional ground state is possible. The measured cavity cooling dynamics are found to agree with a rate equation model without any free parameters. The third and final part of the thesis presents a theoretical proposal for interconversion between single trapped ion qubits and single photon qubits for quantum communication. The idea is to map the state of the single ion qubit to a superradiant collective state of several ions, which then couples strongly with single photons in an optical cavity. Thesis Supervisor: Isaac L. Chuang Title: Associate Professor, Departments of Physics and EECS 4.3% topic match

4.2%

2.3

2003

[165] Quantum computer using a trapped-ion spin molecule and microwave radiation D. M. Hugh and J. Twamley Physical Review A 2003 - 47 citations - Show abstract - Cite - PDF 4.2% topic match

4.2%

0.0

2014

[166] Protoype Solid State Quantum Interface for Trapped Ions H. Haeffner https://doi.org/10.21236/ada619267 2014 - 0 citations - Show abstract - Cite 4.2% topic match

4.2%

1.4

2023

[167] Scalable architecture for trapped-ion quantum computing using RF traps and dynamic optical potentials David Schwerdt, ..., and R. Ozeri Journal Not Provided 2023 - 1 citations - Show abstract - Cite - PDF 4.2% topic match

4.2%

0.0

2023

[168] Trapped ions quantum logic gate with optical tweezers and the Magnus effect M. Mazzanti, ..., and A. Safavi-Naini Physical Review Research 2023 - 0 citations - Show abstract - Cite 4.2% topic match

4.1%

4.7

2014

[169] Ion traps fabricated in a CMOS foundry K. Mehta, ..., and J. Chiaverini Applied Physics Letters 2014 - 48 citations - Show abstract - Cite - PDF 4.1% topic match

4.1%

0.0

2016

[170] Theoretical studies for experimental implementation of quantum computing with trapped ions B. Yoshimura Georgetown University-Graduate School of Arts & Sciences 2016 - 0 citations - Show abstract - Cite 4.1% topic match

4.0%

0.1

2016

[171] Cryogenic ion trapping for next generation quantum technologies D. Motte and C. Darren Journal Not Provided 2016 - 1 citations - Show abstract - Cite Abstract: Quantum technology has made great strides in the last two decades with trapped ions demonstrating all the necessary building blocks for a quantum computer. While these proof of principle experiments have been demonstrated, it still remains a challenging task to scale these experiments down to smaller systems. In this thesis I describe the development of technology towards scalable cryogenic ion trapping and quantum hybrid systems. I first discuss the fundamentals of ion trapping along with the demonstration of ion trapping on a novel surface electrode ion trap with a ring shaped architecture. I then present the development of a cryogenic vacuum system for ion trapping at ~4 K, which utilizes a closed cycle Gifford McMahon cryocooler with a helium gas buffered ultra-low vibration interface to mechanically decouple a ultra-high vacuum system. Ancillary technologies are also presented, including a novel in-vacuum superconducting rf resonator, low power dissipation ceramic based atomic source oven and an adaptable in-vacuum permanent magnet system for long-wavelength based quantum logic. The design and fabrication of microfabricated surface ion traps toward quantum hybrid technologies are then presented. A superconducting ion trap with an integrated high quality factor microwave cavity and vertical ion shuttling capabilities is described. The experimental demonstration of the cavity is also presented with quality factors of Q6~6000 and Q~15000 for superconducting niobium nitride and gold based cavities respectively, which are the highest demonstrated for microwave cavities integrated within ion trapping electrode architectures. An ion trap with a multipole electrode geometry is then presented, which is capable of trapping a large number of ions simultaneously. The homogeneity of five individual linear trapping regions are optimized and the design for the principle axis rotation of each linear region is presented. An overview of microfabrication techniques used for fabricating surface electrode ion traps is then presented. This includes the detailed microfabrication procedure for ion traps designed within this thesis. A scheme for the integration of ion trapping and superconducting qubit systems as a step towards the realization of a quantum hybrid system is then presented. This scheme addresses two key diffculties in realizing such a system; a combined microfabricated ion trap and superconducting qubit architecture, and the experimental infrastructure to facilitate both technologies. Solutions that can be immediately implemented using current technology are presented. Finally, as a step towards scalability and hybrid quantum systems, the interaction between a single ion and a microwaves field produced from an on chip microwave cavity is explored. The interaction is described for the high-Q microwave cavity designed in this thesis and a 171Yb+ion. A description of the observable transmission from the cavity is described and it is shown that the presence of a single ion can indeed be observed in the emission spectrum of high-Q microwave cavity even in the weak coupling regime. 4.0% topic match

4.0%

2.4

2019

[172] Towards fast and scalable trapped-ion quantum logic with integrated photonics K. Mehta, ..., and J. Home https://doi.org/10.1117/12.2507647 2019 - 13 citations - Show abstract - Cite 4.0% topic match

4.0%

11.2

2020

[173] Architecting Noisy Intermediate-Scale Trapped Ion Quantum Computers Prakash Murali, ..., and M. Martonosi 2020 ACM/IEEE 47th Annual International Symposium on Computer Architecture (ISCA) 2020 - 48 citations - Show abstract - Cite - PDF Abstract: Trapped ions (TI) are a leading candidate for building Noisy Intermediate-Scale Quantum (NISQ) hardware. TI qubits have fundamental advantages over other technologies such as superconducting qubits, including high qubit quality, coherence and connectivity. However, current TI systems are small in size, with 5-20 qubits and typically use a single trap architecture which has fundamental scalability limitations. To progress towards the next major milestone of 50-100 qubit TI devices, a modular architecture termed the Quantum Charge Coupled Device (QCCD) has been proposed. In a QCCD-based TI device, small traps are connected through ion shuttling. While the basic hardware components for such devices have been demonstrated, building a 50-100 qubit system is challenging because of a wide range of design possibilities for trap sizing, communication topology and gate implementations and the need to match diverse application resource requirements.Towards realizing QCCD-based TI systems with 50-100 qubits, we perform an extensive application-driven architectural study evaluating the key design choices of trap sizing, communication topology and operation implementation methods. To enable our study, we built a design toolflow which takes a QCCD architecture’s parameters as input, along with a set of applications and realistic hardware performance models. Our toolflow maps the applications onto the target device and simulates their execution to compute metrics such as application run time, reliability and device noise rates. Using six applications and several hardware design points, we show that trap sizing and communication topology choices can impact application reliability by up to three orders of magnitude. Microarchitectural gate implementation choices influence reliability by another order of magnitude. From these studies, we provide concrete recommendations to tune these choices to achieve highly reliable and performant application executions. With industry and academic efforts underway to build TI devices with 50-100 qubits, our insights have the potential to influence QC hardware in the near-future and accelerate the progress towards practical QC systems. 4.0% topic match

4.0%

4.7

2012

[174] A monolithic array of three-dimensional ion traps fabricated with conventional semiconductor technology. G. Wilpers, ..., and A. Sinclair Nature nanotechnology 2012 - 56 citations - Show abstract - Cite 4.0% topic match

3.9%

0.7

2019

[175] ILP-Based Scheduling for Linear-Tape Model Trapped-Ion Quantum Computers Xin-Chuan Wu Journal Not Provided 2019 - 4 citations - Show abstract - Cite 3.9% topic match

3.9%

0.9

2021

[176] Exact Physical Design of Quantum Circuits for Ion-Trap-based Quantum Architectures Oliver Keszöcze, ..., and R. Wille 2021 Design, Automation & Test in Europe Conference & Exhibition (DATE) 2021 - 3 citations - Show abstract - Cite 3.9% topic match

3.8%

0.0

2023

[177] Hybrid Trapping of $^{87}$Rb Atoms and Yb$^{+}$ Ions in a Chip-Based Experimental Setup A. Bahrami, ..., and F. Schmidt-Kaler Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 3.8% topic match

3.8%

1.0

2003

[178] Ion-trap quantum computing in the presence of cooling Almut Beige Physical Review A 2003 - 22 citations - Show abstract - Cite - PDF 3.8% topic match

3.7%

2.2

2024

[179] Harnessing the Quantum Zeno Effect: A New Approach to Ion Trapping Varqa Abyaneh Journal Not Provided 2024 - 1 citations - Show abstract - Cite - PDF 3.7% topic match

3.7%

0.4

2022

[180] Ion Coulomb Crystals in Storage Rings for Quantum Information Science S. Brooks, ..., and S. Milton Journal Not Provided 2022 - 1 citations - Show abstract - Cite - PDF 3.7% topic match

3.7%

0.5

2010

[181] Quantum non-demolition measurements and quantum simulation G. Kirchmair Journal Not Provided 2010 - 7 citations - Show abstract - Cite Abstract: Quantum information processing (QIP) has developed into one of the “hot topics” in physics during the last decade. More and more experiments appeared aiming at the realization of a quantum computer and/or quantum simulations. Strings of ions stored in a Paul trap are currently one of the most promising systems for realizing quantum algorithms. The great challenges ion traps are facing is the realization of robust high fidelity operations, scalable traps and the combination of all DiVincenzo criteria in one system. This thesis reports on the realization of simple QIP sequences and a quantum simulation with trapped Caand Caions. For both isotopes the quantum bit (qubit) is encoded in an optical transition. It consists of the ground state S1/2 and the metastable excited state D5/2. The isotope Cahas a nuclear spin of I = 7/2 and thus exhibits a very complicated level structure. The advantage of this isotope is that hyperfine levels can be used as a robust memory for quantum information. In the framework of this thesis a high fidelity Mølmer-Sørensen gate operation was implemented. Two ion Bell states and three ion GHZ states were created with a respective fidelity of 99.3% and 98.4% using Caions. It was demonstrated that the Mølmer-Sørensen gate operation works nearly as well for ions cooled to the ground state as for ions in thermal states of motion. The fidelity achieved for thermal ions was still 98.4%. A thorough experimental analysis of the gate mechanism indicated possible error sources. A combination of four DiVincenzo criteria (initialization, long coherence times, a universal set of gates, readout) was realized by utilizing Cahyperfine states. Bell states, created on the optical qubit, were stored in the qubit S1/2, F = 4, mf = 0 ↔ S1/2, F = 3,mf = 0 for 20 ms. The experience gained with the entangling operation rendered it possible to do non-demolition two-qubit measurements. The non-demolition measurements were used to experimentally test hidden variable theories, more precisely the Kochen Specker theorem. The experiments conducted showed that hidden variables assuming non-contextuality of measurements cannot reproduce the behavior of quantum systems. This was proven by violating an inequality akin to Bell tests. The experimental results also demonstrated the state-independence of the Kochen Specker argument. A possible compatibility loophole was closed by taking into account experimental errors in the theory. The resulting modified equation was found to be violated in our experiments. Finally, a proof of principle quantum simulation of the Dirac equation was implemented. Position and momentum of the Dirac particle were mapped onto the respective quadrature components of the ion trap harmonic oscillator. A new method to measure the expectation value of position and momentum was implemented. The particle trajectories obtained showed effects like Zitterbewegung. Using the high degree of control available in the experiment specific initial states were created showing different trajectories. 3.7% topic match

3.7%

4.3

2012

[182] Single ions trapped in a one-dimensional optical lattice. M. Enderlein, ..., and T. Schaetz Physical review letters 2012 - 51 citations - Show abstract - Cite - PDF 3.7% topic match

3.7%

3.9

2004

[183] How to build a 300 bit, 1 Giga-operation quantum computer A. Steane Quantum Inf. Comput. 2004 - 76 citations - Show abstract - Cite - PDF 3.7% topic match

3.7%

0.0

2007

[184] Architectural Design Issues for Reliable Trapped Ion Quantum Computers I. Chuang Bulletin of the American Physical Society 2007 - 0 citations - Show abstract - Cite 3.7% topic match

3.6%

9.0

2020

[185] Integrated Optical Addressing of a Trapped Ytterbium Ion M. Ivory, ..., and L. Parazzoli Physical Review X 2020 - 33 citations - Show abstract - Cite - PDF 3.6% topic match

3.6%

3.0

2021

[186] Engineering spin-spin interactions with optical tweezers in trapped ions J. D. A. Espinoza, ..., and A. Safavi-Naini Physical Review A 2021 - 10 citations - Show abstract - Cite - PDF 3.6% topic match

3.6%

0.0

2024

[187] TITAN: A Distributed Large-Scale Trapped-Ion NISQ Computer Cheng Chu, ..., and Lei Jiang ArXiv 2024 - 0 citations - Show abstract - Cite - PDF 3.6% topic match

3.6%

0.1

2011

[188] Coherently manipulating cold ions in separated traps by their vibrational couplings II: non-adiabatic case Miao Zhang and L. F. Wei https://doi.org/10.1103/PhysRevA.83.064301 2011 - 1 citations - Show abstract - Cite - PDF 3.6% topic match

3.6%

3.0

2017

[189] Scaling Trapped Ion Quantum Computers Using Fast Gates and Microtraps. Alexander K. Ratcliffe, ..., and A. Carvalho Physical review letters 2017 - 20 citations - Show abstract - Cite - PDF 3.6% topic match

3.5%

1.2

2009

[190] Fast shuttling of ions in a scalable Penning trap array. D. Crick, ..., and D. M. Segal The Review of scientific instruments 2009 - 18 citations - Show abstract - Cite - PDF 3.5% topic match

3.5%

1.5

2023

[191] A Site-Resolved 2D Quantum Simulator with Hundreds of Trapped Ions under Tunable Couplings S.-A. Guo, ..., and Lu-Ming Duan Journal Not Provided 2023 - 1 citations - Show abstract - Cite - PDF 3.5% topic match

3.4%

0.0

2023

[192] VelociTI: An Architecture-level Performance Modeling Framework for Trapped Ion Quantum Computers Alexander Hankin, ..., and Gu-Yeon Wei 2023 IEEE International Symposium on Workload Characterization (IISWC) 2023 - 0 citations - Show abstract - Cite 3.4% topic match

3.4%

0.4

2010

[193] A cryogenic surface-electrode elliptical ion trap for quantum simulation R. Clark, ..., and I. Chuang Journal of Applied Physics 2010 - 5 citations - Show abstract - Cite - PDF 3.4% topic match

3.4%

1.9

2018

[194] Fabrication and Characterization of Surface Electrode Ion Trap for Quantum Computing J. Tao, ..., and C. S. Tan 2018 IEEE 20th Electronics Packaging Technology Conference (EPTC) 2018 - 11 citations - Show abstract - Cite 3.4% topic match

3.4%

0.0

2012

[195] Comprehensive Materials and Morphologies Study of Ion Traps (COMMIT) for Scalable Quantum Computation I. Chuang https://doi.org/10.21236/ada577696 2012 - 0 citations - Show abstract - Cite 3.4% topic match

3.3%

0.4

2022

[196] Cavity-QED with single trapped ions M. Keller Contemporary Physics 2022 - 1 citations - Show abstract - Cite 3.3% topic match

3.3%

1.1

2009

[197] Quantum Logic Between Distant Trapped Ions S. Olmschenk, ..., and C. Monroe International Journal of Quantum Information 2009 - 16 citations - Show abstract - Cite - PDF 3.3% topic match

3.3%

0.0

2017

[198] Algorithms for Embedding Quantum-Dot Cellular Automata Networks onto a Quantum Annealing Processor Jacob Retallick, ..., and Burnaby arXiv: Quantum Physics 2017 - 0 citations - Show abstract - Cite - PDF 3.3% topic match

3.3%

2.9

2021

[199] An ion trap apparatus with high optical access in multiple directions. Ran He, ..., and G. Guo The Review of scientific instruments 2021 - 9 citations - Show abstract - Cite 3.3% topic match

3.2%

0.1

2009

[200] Designing an ion trap for quantum simulation I. Buluta and S. Hasegawa Quantum Inf. Comput. 2009 - 1 citations - Show abstract - Cite 3.2% topic match

3.2%

0.0

2017

[201] Performance Characterization of a Scalable Trapped Ion Based Quantum Computer S. Crain, ..., and Jungsang Kim Bulletin of the American Physical Society 2017 - 0 citations - Show abstract - Cite 3.2% topic match

3.2%

0.0

2001

[202] Towards quantum computation with trapped Ca+ ions Ferdinand Schmidt-Kaler, ..., and Rainer Blatt Optical Fiber Communications Conference and Exhibition 2001 - 0 citations - Show abstract - Cite 3.2% topic match

3.2%

3.6

2016

[203] Transport implementation of the Bernstein–Vazirani algorithm with ion qubits S. Fallek, ..., and J. Amini New Journal of Physics 2016 - 30 citations - Show abstract - Cite - PDF 3.2% topic match

3.1%

3.7

2006

[204] Optimization of segmented linear Paul traps and transport of stored particles S. Schulz, ..., and F. Schmidt-Kaler Fortschritte der Physik 2006 - 66 citations - Show abstract - Cite - PDF 3.1% topic match

3.1%

2.7

2014

[205] Operation of a planar-electrode ion-trap array with adjustable RF electrodes M. Kumph, ..., and R. Blatt New Journal of Physics 2014 - 28 citations - Show abstract - Cite - PDF 3.1% topic match

3.1%

4.5

2021

[206] Single-qubit universal classifier implemented on an ion-trap quantum device T. Dutta, ..., and M. Mukherjee Physical Review A 2021 - 14 citations - Show abstract - Cite - PDF 3.1% topic match

3.1%

4.4

2020

[207] 2D Linear Trap Array for Quantum Information Processing P. Holz, ..., and R. Blatt Advanced Quantum Technologies 2020 - 19 citations - Show abstract - Cite 3.1% topic match

3.1%

0.5

2022

[208] Trapped Ions as an Architecture for Quantum Computing Gabriel P. L. M. Fernandes, ..., and Celso J. Villas-Boas Journal Not Provided 2022 - 1 citations - Show abstract - Cite - PDF 3.1% topic match

3.0%

0.0

2007

[209] Progress towards a multiplexed, semiconductor ion trap for quantum computation D. Leibrandt, ..., and I. Chuang Bulletin of the American Physical Society 2007 - 0 citations - Show abstract - Cite 3.0% topic match

3.0%

0.0

2011

[210] Demonstration of integrated reflective optics in microfabricated ion traps J. Merrill, ..., and R. Slusher Journal Not Provided 2011 - 0 citations - Show abstract - Cite 3.0% topic match

3.0%

4.7

2017

[211] Optical Trapping of Ion Coulomb Crystals Julian Schmidt, ..., and T. Schaetz arXiv: Quantum Physics 2017 - 31 citations - Show abstract - Cite - PDF 3.0% topic match

3.0%

0.4

2011

[212] Yb+ ion trapping and optimum planar trap geometries for scalable quantum technology A. H. Nizamani Journal Not Provided 2011 - 5 citations - Show abstract - Cite Abstract: Trapped ions in linear Paul traps are largely isolated from interaction with the environment. This property of trapped ions make them a primary choice for quantum technology. Over the last decade, trapped atomic ions in linear radio frequency Paul traps have shown to be an important tool to implement quantum algorithms. The scalability of linear ion traps is required to handle large numbers of qubits, in order to implement useful quantum computation. Advance micro-fabrication technology allows the realisation of scalable ion traps. Further developments of micro-trap designs, for the purpose of scalable quantum technology, requires inter-disciplinary investigations of ion traps. Micro-scale ion trap designs typically require a versatile experimental setup. The first part of this thesis describes such an experimental setup including a chip bracket that can host macroscopic ion traps as well as advanced symmetric and asymmetric ion trap chips with up to 90 control electrodes. The system provides versatile optical access for both type of traps and the vacuum chamber is designed in a way so the ion traps can be replaced within a short amount of time. To test the working of the setup, a macroscopic ion trap with an ion-electrode distance of 310±10 μm is used to trap ytterbium ions (Yb+). The trap is characterised by measuring the heating rate, (n•), and spectral noise density SE(ω). A photoionisation technique is used to ionise the different isotopes of Yb in our trap. Isotope selective photoionisation requires exact measurements of 1So↔1P1 transition for the different Yb isotopes. A technique to measure these resonant frequencies is described. This technique works by observing and aligning fluorescence spots and by using this technique, the 1So↔1P1 transition frequencies for stable isotopes of Yb were measured with an accuracy of 60 MHz. These new measured transition frequencies for stable Yb isotopes differ from previously published work by 660 MHz. Furthermore, this technique can also be used to obtain the transition frequencies at different laser-atomic beam angles, typical for non-perpendicular laser-atomic beam angles. The second part of this thesis discusses the optimisation of surface trap geometries as they are being used to implement scalable ion trap designs which consist of a large number of trapping zones. The trap depth in surface traps is low compared to symmetric traps of similar dimensions. How to optimise the trap geometry to achieve maximum trap depth for a given ion height above the trap electrodes, is discussed. Fast and adiabatic ion shuttling operations in one dimension as well as ion separation and recombination processes are important for many quantum information implementations. The maximum speed of separation of trapped ions for adiabatic shuttling operations depends on the secular frequencies, the trapped ion experiences in the process. It will be shown how such ion trap structures have to be designed for fast ion separation process and linear shuttling. Numerical results of adiabatic shuttling operations for trapped ions in such trap structures are also presented. 3.0% topic match

3.0%

0.0

2012

[213] Abstract Submitted for the DAMOP11 Meeting of The American Physical Society Quantum Manipulation of an Ion Coupled to an LC Circuit1 DVIR Jacob M. Taylor Journal Not Provided 2012 - 0 citations - Show abstract - Cite 3.0% topic match

3.0%

0.3

2018

[214] Building and Programming a Universal Ion Trap Quantum Computer C. Figgatt https://doi.org/10.13016/M2K35MH5F 2018 - 2 citations - Show abstract - Cite Abstract: Title of dissertation: Building and Programming a Universal Ion Trap Quantum Computer Caroline Margaret Figgatt Doctor of Philosophy, 2018 Dissertation directed by: Professor Christopher Monroe Department of Physics Quantum computing represents an exciting frontier in the realm of information processing; it is a promising technology that may provide future advances in a wide range of fields, from quantum chemistry to optimization problems. This thesis discusses experimental results for several quantum algorithms performed on a programmable quantum computer consisting of a linear chain of five or seven trapped Yb atomic clock ions with long coherence times and high gate fidelities. We execute modular oneand two-qubit computation gates through Raman transitions driven by a beat note between counter-propagating beams from a pulsed laser. The system’s individual addressing capability provides arbitrary single-qubit rotations as well as all possible two-qubit entangling gates, which are implemented using a pulse-segmentation scheme. The quantum computer can be programmed from a high-level interface to execute arbitrary quantum circuits, and comes with a toolbox of many important composite gates and quantum subroutines. We present experimental results for a complete three-qubit Grover quantum search algorithm, a hallmark application of a quantum computer with a well-known speedup over classical searches of an unsorted database, and report better-thanclassical performance. The algorithm is performed for all 8 possible single-result oracles and all 28 possible two-result oracles. All quantum solutions are shown to outperform their classical counterparts. Performing parallel operations will be a powerful capability as deeper circuits on larger, more complex quantum computers present new challenges. Here, we perform a pair of 2-qubit gates simultaneously in a single chain of trapped ions. We employ a pre-calculated pulse shaping scheme that modulates the phase and amplitude of the Raman transitions to drive programmable high-fidelity 2-qubit entangling gates in parallel by coupling to the collective modes of motion of the ion chain. Ensuring the operation yields only spin-spin interactions between the desired pairs, with neither residual spin-motion entanglement nor crosstalk spinspin entanglement, is a nonlinear constraint problem, and pulse solutions are found using optimization techniques. As an application, we demonstrate the quantum full adder using a depth-4 circuit requiring the use of parallel 2-qubit operations. BUILDING AND PROGRAMMING A UNIVERSAL ION TRAP QUANTUM COMPUTER 3.0% topic match

2.9%

0.4

2021

[215] Coherent effects contribution to a fast gate fidelity in ion quantum computer P. Sidorov, ..., and Russian Quantum Center Journal Not Provided 2021 - 1 citations - Show abstract - Cite - PDF 2.9% topic match

2.9%

0.0

2012

[216] Quantum Information Processing and Quantum Simulations with Trapped Ions R. Blatt https://doi.org/10.1364/QIM.2012.QM2A.1 2012 - 0 citations - Show abstract - Cite 2.9% topic match

2.9%

1.6

2017

[217] Integrated optical quantum manipulation and measurement of trapped ions K. Mehta Journal Not Provided 2017 - 12 citations - Show abstract - Cite Abstract: Individual atomic ions confined in designed electromagnetic potentials and manipulated via lasers are strong candidates as physical bases for quantum information processing (QIP). This is in large part due to their long coherence times, indistinguishability, and strong Coulomb interactions. Much work in recent years has utilized these properties to implement increasingly precise quantum operations essential for QIP, as well as to conduct increasingly sophisticated experiments on few-ion systems. Many questions remain however regarding how to implement the significant classical apparatus required to control and measure many ions (and indeed any physical qubit under study) in a scalable way that furthermore does not compromise qubit quality. This work draws on techniques in integrated optics to address this question. Planar-fabricated waveguides and gratings integrated with planar ion traps are demonstrated to allow optical addressing of individual Srions 50 μm above the chip surface with diffraction-limited focused beams, with advantages in stability and scalability. Motivated by the requirement for low crosstalk in qubit addressing, we show also that intuitively designed devices can generate precisely tailored intensity profiles at the ion locations, with diffraction-limited sidelobe intensities characterized to the 5×10−6 level in relative intensity up to 25 μm from the focus. Such devices can be implemented alongside complex systems in complementary metal-oxide-semiconductor (CMOS) processes. We show in addition that the multiple patternable metal layers present in CMOS processes can be used to create complex planar ion traps with performance comparable to simple single-layer traps, and that CMOS silicon avalanche photodiodes may be employed for scalable quantum state readout. Finally we show initial results on integrated electro-optic modulators for visible light. These results open possibilities for experiments with trapped ions in the short term, and indicate routes to achieving large-scale systems of thousands or more ions in the future. Though ion qubits may seem isolated from scalable solid-state technologies, it appears this apparent isolation may uniquely allow a cooperation with complex planar-fabricated optical and electronic systems without introducing additional decoherence. Thesis Supervisor: Rajeev J. Ram Title: Professor of Electrical Engineering 2.9% topic match

2.9%

0.0

2008

[218] Microfabrication of a Planar Paul Trap A. Salvador and P. Ziemann Journal Not Provided 2008 - 0 citations - Show abstract - Cite 2.9% topic match

2.9%

4.0

2013

[219] Single qubit manipulation in a microfabricated surface electrode ion trap E. Mount, ..., and Jungsang Kim New Journal of Physics 2013 - 45 citations - Show abstract - Cite - PDF 2.9% topic match

2.9%

5.4

2017

[220] Trapping ions and atoms optically T. Schaetz Journal of Physics B: Atomic, Molecular and Optical Physics 2017 - 39 citations - Show abstract - Cite - PDF 2.9% topic match

2.8%

5.3

2005

[221] System design for large-scale ion trap quantum information processor Jungsang Kim, ..., and M. Dinu Quantum Inf. Comput. 2005 - 99 citations - Show abstract - Cite 2.8% topic match

2.8%

2.0

2013

[222] Characterization of Fluorescence Collection Optics Integrated with a Microfabricated Surface Electrode Ion Trap C. R. Clark, ..., and D. Stick Physical review applied 2013 - 22 citations - Show abstract - Cite - PDF 2.8% topic match

2.8%

0.8

2014

[223] Scalable quantum computing architecture with mixed species ion chains John Wright, ..., and B. Blinov https://doi.org/10.1117/12.2177997 2014 - 8 citations - Show abstract - Cite - PDF 2.8% topic match

2.8%

5.2

2005

[224] Arbitrary-speed quantum gates within large ion crystals through minimum control of laser beams Shi-Liang Zhu, ..., and L. Duan EPL 2005 - 99 citations - Show abstract - Cite - PDF 2.8% topic match

2.7%

0.0

2019

[225] Realization of two-dimensional crystal of ions in a monolithic Paul trap Ye Wang, ..., and Kihwan Kim arXiv: Quantum Physics 2019 - 0 citations - Show abstract - Cite - PDF 2.7% topic match

2.7%

0.5

2011

[226] Modular Universal Scalable Ion‐trap Quantum Computer (MUSIQC) Jungsang Kim, ..., and C. Monroe https://doi.org/10.1063/1.3630178 2011 - 7 citations - Show abstract - Cite 2.7% topic match

2.7%

7.0

2013

[227] Entanglement and Quantum Error Correction with Superconducting Qubits M. Reed arXiv: Quantum Physics 2013 - 75 citations - Show abstract - Cite - PDF 2.7% topic match

2.7%

0.0

2023

[228] Review of Recent Laser Technology of Development Multi Qubit Gates Using Ion Trap Method Abdulkader H. Atiya and M. Al-Temimi Applied Mechanics and Materials 2023 - 0 citations - Show abstract - Cite 2.7% topic match

2.7%

4.6

2020

[229] Scalable and parallel tweezer gates for quantum computing with long ion strings Tobias Olsacher, ..., and L. M. Sieberer Quantum Computing, Communication, and Simulation 2020 - 18 citations - Show abstract - Cite - PDF 2.7% topic match

2.7%

None

[230] Quantum computation with two-level trapped cold ions beyond Lamb-Dicke limit L. F. Wei, ..., and X. Lei Journal Not Provided None - 3 citations - Show abstract - Cite Abstract: Since Shor’s algorithm for efficiently factoring large numbers was proposed [1], many authors have addressed the problem of implementing quantum computation [2]. It has been shown that arbitrary rotations in the Hilbert space of an individual computational qubit (CQ), i.e., one-qubit gate, and a controlled rotation, such as a controlled-NOT (C ) or controlled-Z (C), between two different CQs, i.e., a two-qubit controlled gate, are universal quantum gates. In other words, any unitary transformation on arbitrarily many CQs can be carried out by repeatedly performing these universal quantum gates [3]. Since one-qubit gates are generally easy to realize, implementing the two-qubit controlled gate operation is a central problem for constructing a quantum computer. Several kinds of physical systems have been proposed to implement quantum logic operations. Some of the most attractive schemes are based on nuclear magnetic resonance (NMR) [4], coupled quantum dots [5], cavity QED [6], and trapped cold ions [8], introduced first by Cirac and Zoller [7]. This system is based on the laser-ion interaction and possesses long qubit coherence times [9]. Information is stored in the spin states of an array of trapped cold ions and manipulated by using laser pulses. Two special conditions are required in the original Cirac-Zoller scheme [7]: a) the ion must have three levels, and b) the trap must operate in the Lamb-Dicke (LD) limit, i.e., the coupling between the internal spin and external vibrational degrees of freedom of the ion must be sufficiently weak. Laser pulses with different polarizations are used to coherently manipulate the quantum information of the system and five-step pulses are used to realize an exact C logic operation between two different cold ions. It is thus desirable to look for simpler schemes to construct ion-trap quantum computer. In the last few years, a number of modifications and extensions to Cirac-Zoller’s idea have been proposed [10,11,13,16]. In particular, carrying out the universal quantum logic gates with a single trapped cooled ion had been paid much attention, because imprisoning a single ion in a trap and cooling it to the vibrational ground state can be easily achieved with the present experimental technology. In 1995, Monroe et al [15] demonstrated a simplified scheme for realizing the ”reduced” two-qubit C logic operation between the internal and external degrees of freedom of the trapped cold ion by applying three laser pulses. Furthermore, by using a single resonant pulse, a two-qubit controlled operation with a single trapped two-level ion outside the LD limit was constructed [11]. However, the third auxiliary internal atomic state is still required in Ref. [15] and the operation reported in Ref. [11] is not the exact C gate, although it is equivalent to the ”reduced” C logic gate [15] apart from phase factors. Subsequent operations must be carried out in order to eliminate the additional phase factors. Up to now, the problem of construction a quantum computing network by connecting different ions in different traps, i.e., the scalability of the single trapped ion, has not been solved [14]. On the other hand, much attention has been paid to the problem of building a quantum network with cold ions confined in a single trap. Recent experiments showed that the collective motion of two Be ions confined in a trap can be cooled to the ground state [19] and that quantum entanglement of up to four ions can be been achieved [20], thus supporting the idea of realizing the quantum computation in a single trap. Theoretically, Jonathan et al [17] proposed an alternative scheme to realize the true two-qubit ion-ion gate by using the AC Stark shift induced by laser resonance with the ionic transition frequency. This scheme allows an increase in gate speed 2.7% topic match

2.6%

1.3

2012

[231] Optimization of two-dimensional ion trap arrays for quantum simulation J. Siverns, ..., and W. Hensinger New Journal of Physics 2012 - 16 citations - Show abstract - Cite - PDF 2.6% topic match

2.6%

5.8

2021

[232] Hybrid MEMS-CMOS ion traps for NISQ computing M. Blain, ..., and D. Stick Quantum Science & Technology 2021 - 18 citations - Show abstract - Cite 2.6% topic match

2.6%

0.1

1989

[233] New ion trap for atomic frequency standard applications J. Prestage, ..., and L. Maleki Journal Not Provided 1989 - 5 citations - Show abstract - Cite 2.6% topic match

2.6%

3.6

2015

[234] Optimized Multi-Ion Cavity Coupling. S. Begley, ..., and M. Keller Physical review letters 2015 - 31 citations - Show abstract - Cite - PDF 2.6% topic match

2.6%

8.0

2009

[235] Large-scale quantum computation in an anharmonic linear ion trap No author found EPL (Europhysics Letters) 2009 - 125 citations - Show abstract - Cite - PDF 2.6% topic match

2.6%

101.2

1995

[236] Quantum Computations with Cold Trapped Ions. J. Cirac and P. Zoller Physical review letters 1995 - 2954 citations - Show abstract - Cite 2.6% topic match

2.6%

53.8

2013

[237] Scaling the Ion Trap Quantum Processor C. Monroe and Jungsang Kim Science 2013 - 613 citations - Show abstract - Cite 2.6% topic match

2.6%

0.0

2011

[238] An introduction to Quantum Computing using Trapped cold Ions March No author found Journal Not Provided 2011 - 0 citations - Show abstract - Cite 2.6% topic match

2.6%

0.4

2012

[239] Microscopic Surface-Electrode Ion Trap for Scalable Quantum Information Processing Liang Chen, ..., and M. Feng Chinese Physics Letters 2012 - 5 citations - Show abstract - Cite 2.6% topic match

2.6%

0.0

1997

[240] Spectroscopy and quantum optics with ion traps R C Thompson, ..., and D M Segal Physica Scripta 1997 - 0 citations - Show abstract - Cite 2.6% topic match

2.6%

2.9

2010

[241] Versatile ytterbium ion trap experiment for operation of scalable ion-trap chips with motional heating and transition-frequency measurements J. McLoughlin, ..., and W. Hensinger Physical Review A 2010 - 41 citations - Show abstract - Cite - PDF 2.6% topic match

2.5%

0.0

2008

[242] Progress towards Scalable Quantum Information Processing with Trapped Ions J. Home, ..., and D. Wineland https://doi.org/10.1364/LS.2008.LTHC3 2008 - 0 citations - Show abstract - Cite 2.5% topic match

2.5%

0.0

2019

[243] Scalable Quantum Computing with Two-Dimensional Arrays of Trapped Ions Enabled by Fast Gates Z. Mehdi https://doi.org/10.25911/5E68B06777433 2019 - 0 citations - Show abstract - Cite Abstract: Realising large-scale quantum computation in the near future will require increasing the number of low-error two-qubit gates that can be implemented on a quantum computer before decoherence. One of the biggest challenges facing current trapped ion quantum computers is implementing high-speed two-qubit operations, whilst increasing the number of qubits. One of the most promising proposals for overcoming current limitations is the use of ultra-fast pulses to implement fast two-qubit gates between nearest-neighbour pairs of ions. In this thesis, I investigate these ‘fast gates’ in two-dimensional arrays of microtraps, each containing a single ion. I argue that two-dimensional architectures allow for a significant reduction in the number of two-qubit gates required for a particular computation, as compared to one-dimensional ion chains. I demonstrate this reduction for a quantum simulation of a 40-mode Fermi-Hubbard Hamiltonian. I develop an efficient scheme that allows fast gates to be numerically optimised for two-dimensional geometries. I find that this optimisation scheme is capable of designing gates that are faster, higher fidelity, and require lower laser repetition rates. Using this scheme, I find that high-speed two-qubit gates can be optimised for two-dimensional architectures, with fidelities well above thresholds required for fault tolerant error correction, around 99.99%. Furthermore, I find that fast gates in these architectures are robust to the presence of large numbers of surrounding ions. Following previous studies [1, 2] which have identified pulse imperfections as a dominant source of error in fast gates, I perform a worst-case error analysis. I find the fast gates presented in this thesis to require very small errors in single-qubit rotations, and I present recommendations for achieving those requirements. I also investigate other experimental considerations, and make recommendations for overcoming other technical challenges in realising fast gates. 2.5% topic match

2.5%

0.7

2014

[244] Trapped Ions Make Impeccable Qubits Jungsang Kim Physics 2014 - 7 citations - Show abstract - Cite 2.5% topic match

2.5%

1.3

2022

[245] Individual qubit addressing of rotating ion crystals in a Penning trap A. Polloreno, ..., and J. Bollinger Physical Review Research 2022 - 3 citations - Show abstract - Cite - PDF 2.5% topic match

2.4%

1.1

2023

[246] Extremum Seeking Control of Quantum Gates Erfan Abbasgholinejad, ..., and Ningzhi Xie 2023 IEEE International Conference on Quantum Computing and Engineering (QCE) 2023 - 1 citations - Show abstract - Cite - PDF 2.4% topic match

2.4%

5.6

2012

[247] Controlling trapping potentials and stray electric fields in a microfabricated ion trap through design and compensation Charles Doret, ..., and A. Harter New Journal of Physics 2012 - 69 citations - Show abstract - Cite - PDF 2.4% topic match

2.4%

3.3

2022

[248] Transport of Multispecies Ion Crystals through a Junction in a Radio-Frequency Paul Trap. W. Burton, ..., and G. Price Physical review letters 2022 - 7 citations - Show abstract - Cite - PDF 2.4% topic match

2.4%

0.0

2024

[249] Cooling trapped ions with phonon rapid adiabatic passage M. I. Fabrikant, ..., and R. T. Sutherland Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 2.4% topic match

2.3%

0.1

2016

[250] Technologies for trapped-ion quantum information systems Progress toward scalability with hybrid systems A. Eltony, ..., and I. Chuang Journal Not Provided 2016 - 1 citations - Show abstract - Cite 2.3% topic match

2.3%

5.2

2011

[251] Microfabricated ion traps M. Hughes, ..., and W. Hensinger Contemporary Physics 2011 - 70 citations - Show abstract - Cite - PDF 2.3% topic match

2.3%

1.3

2009

[252] Fabrication of a planar micro Penning trap and numerical investigations of versatile ion positioning protocols M. Hellwig, ..., and F. Schmidt-Kaler New Journal of Physics 2009 - 19 citations - Show abstract - Cite - PDF 2.3% topic match

2.3%

0.0

1975

[253] Nonresonant ion trap G. Brink Review of Scientific Instruments 1975 - 2 citations - Show abstract - Cite 2.3% topic match

2.3%

0.0

2015

[254] Probing Quantum Magnetism in 2D with an Array of Hundreds of Trapped Ions J. Bollinger Bulletin of the American Physical Society 2015 - 0 citations - Show abstract - Cite 2.3% topic match

2.3%

0.0

2024

[255] Generating Shuttling Procedures for Constrained Silicon Quantum Dot Array Naoto Sato, ..., and Hiroyuki - Mizuno ArXiv 2024 - 0 citations - Show abstract - Cite - PDF 2.3% topic match

2.3%

2.8

2022

[256] Backend compiler phases for trapped-ion quantum computers Tobias Schmale, ..., and Daniel Borcherding 2022 IEEE International Conference on Quantum Software (QSW) 2022 - 6 citations - Show abstract - Cite - PDF 2.3% topic match

2.3%

55.6

2017

[257] Experimental comparison of two quantum computing architectures N. Linke, ..., and C. Monroe Proceedings of the National Academy of Sciences 2017 - 415 citations - Show abstract - Cite - PDF 2.3% topic match

2.2%

1.4

1992

[258] Planar ion microtraps. Richard G. Brewer, ..., and R. Kallenbach Physical review. A, Atomic, molecular, and optical physics 1992 - 45 citations - Show abstract - Cite 2.2% topic match

2.2%

0.0

2023

[259] Demonstration of a micro-fabricated Penning trap for quantum computing T. Sägesser, ..., and Jonathan Home 2023 IEEE International Conference on Quantum Computing and Engineering (QCE) 2023 - 0 citations - Show abstract - Cite 2.2% topic match

2.2%

4.9

2017

[260] Non-thermalization in trapped atomic ion spin chains Paul Hess, ..., and C. Monroe Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 2017 - 36 citations - Show abstract - Cite - PDF 2.2% topic match

2.2%

0.0

2010

[261] Precision measurements of the Casimir force between metallic and semiconducting plates N. Baddour, ..., and D. Budker Journal Not Provided 2010 - 0 citations - Show abstract - Cite 2.2% topic match

2.2%

2.5

2012

[262] Quantum control of the motional states of trapped ions through fast switching of trapping potentials J. Alonso, ..., and J. Home New Journal of Physics 2012 - 30 citations - Show abstract - Cite - PDF 2.2% topic match

2.2%

0.3

2010

[263] Microfabricated surface trap for scalable ion-photon interfaces P. Herskind, ..., and I. Chuang CLEO: 2011 - Laser Science to Photonic Applications 2010 - 4 citations - Show abstract - Cite 2.2% topic match

2.2%

0.0

2003

[264] A Brief Comparison : Ion-Trap and Silicon-Based Implementations of Quantum Computation Tzvetan Metodiev, ..., and J. Kubiatowicz Journal Not Provided 2003 - 0 citations - Show abstract - Cite 2.2% topic match

2.2%

1.0

2020

[265] Phase-Adaptive Dynamical Decoupling Methods for Robust Spin-Spin Dynamics in Trapped Ions Li Dong, ..., and J. Casanova arXiv: Quantum Physics 2020 - 4 citations - Show abstract - Cite - PDF 2.2% topic match

2.1%

3.7

2006

[266] Electrodynamically trapped Yb + ions for quantum information processing C. Balzer, ..., and C. Wunderlich Physical Review A 2006 - 69 citations - Show abstract - Cite - PDF Abstract: When investigating fundamental questions related to quantum mechanics, experiments are called for where individual quantum systems can be accessed and deterministically manipulated. The interaction of trapped atomic ions among themselves and with their environment can be controlled to a high degree of accuracy, and thus allows for the preparation of well-defined quantum states of the ions’ internal and motional degrees of freedom. Trapped ions have proven to be well suited for a multitude of investigations, for instance, into entanglement, decoherence, and quantum information processing, and for applications such as atomic frequency standards. Quantum information processing, in particular, requires the accurate and precise control of internal and often of motional quantum dynamics of a collection of trapped ions. In order to eliminate sources of possible errors, and thus prepare the ground to attain the ambitious goal of using trapped ions for large-scale quantum computing or quantum simulations, it is desirable to simplify the apparatus used for such experiments as far as possible. An unprecedented degree of control of quantum systems has been reached in recent experiments with trapped ions, for instance, with Be + 1 ,C a + 2, and Cd + 3 ions. Mainly the type of ion used in such experiments determines the experimental infrastructure needed for the controlled manipulation of these ions. The available ionic transitions, for instance, determine the radiation sources to be used: In Ca + , an optical electric quadrupole transition has been used as a qubit leading to a coherence time ultimately limited by spontaneous radiative decay. More importantly, phase fluctuations of the laser light driving the qubit transition limit the available coherence time, even when using a highly sophisticated light source 5. Phase fluctuations of the radiation driving the qubit transition do not present a major obstacle, if a hyperfine transition is used as a qubit as, for instance, in Be + or Cd + , since such a transition is usually excited by a stimulated two-photon Raman process where only relative fluctuations between the two driving fields limit the available coherence time. Choosing magnetic field insensitive states as a qubit, as was demonstrated recently with Yb + 4 and Be + 6, may further contribute to achieving the desired long co 2.1% topic match

2.1%

0.1

2010

[267] Miniature radio frequency ion trap mass spectrometry Jeffrey D. Maas, ..., and W. Chappell 2010 IEEE MTT-S International Microwave Symposium 2010 - 2 citations - Show abstract - Cite 2.1% topic match

2.1%

3.4

2022

[268] Coherent Control of Trapped-Ion Qubits with Localized Electric Fields. R. Srinivas, ..., and C. Ballance Physical review letters 2022 - 6 citations - Show abstract - Cite - PDF 2.1% topic match

2.1%

1.7

2016

[269] Guidelines for Designing Surface Ion Traps Using the Boundary Element Method Seokjun Hong, ..., and D. Cho Sensors (Basel, Switzerland) 2016 - 14 citations - Show abstract - Cite 2.1% topic match

2.1%

6.3

2009

[270] Implementation of a symmetric surface-electrode ion trap with field compensation using a modulated Raman effect D. Allcock, ..., and D. Lucas New Journal of Physics 2009 - 94 citations - Show abstract - Cite - PDF 2.1% topic match

2.1%

0.4

2011

[271] Quantum optics experiments in a microstructured ion trap U. Poschinger https://doi.org/10.18725/OPARU-1898 2011 - 5 citations - Show abstract - Cite Abstract: This dissertation describes a prototype experiment aiming at the realization of scalable quantum information. The essential feature is the usage of a novel microstructured ion trap derived from the Paul trap. It allows for storing and manipulating a large number of ions, as compared to conventional linear Paul traps. This thesis describes how the way is paved towards the realization of quantum information experiments in this ion trap. An analysis of the electrostatic properties of the ion trap is presented, which is laying the foundation for understanding the limits of confinement stability and effects beyond standard Paul trap behavior. The focus of this work lies on the realization and characterization of single and dual qubit operations, which are achieved by means of (semiclassical) atom-light interaction. In our experiment, the qubit is implemented in the Zeeman sublevels of the ion’s ground state, i.e. in the spin of the bright electron of a 40Ca+ ion. The main body of this thesis then describes the realization of the necessary steps of preparation, manipulation and readout of this qubit. The preparation includes optical pumping and cooling close to the motional quantum ground state by means of sideband cooling. Several possible techniques for these steps are tested and analyzed. Coherent manipulations are carried out by means of stimulated Raman transitions. Here, a strong emphasis is put on the characterization of the various decoherence mechanisms, which are dominated by the motional excitation of the ion due to thermalization of the ion with the trap electrodes, and by imperfections in the ion-laser interactions. As by-product of the latter investigation, a new measurement scheme for the experimental determination of atomic dipole matrix elements is presented. Finally, experimental results on the preparation of Schrödinger Cat states and on the tomography of a single ion’s motional state are presented. It is also described how Schrödinger Cat states can be used as a measurement tool for the ultraprecise monitoring of a single ion’s phase space trajectory, where deviations from the Lamb-Dicke limit dynamics are seen. 2.1% topic match

2.1%

0.1

2010

[272] Miniaturized UV fluorescence collection optics integrated with ion trap chips G. Brady, ..., and A. R. Ellis https://doi.org/10.1117/12.871023 2010 - 1 citations - Show abstract - Cite 2.1% topic match

2.0%

4.4

2021

[273] Multiplexed quantum repeaters based on dual-species trapped-ion systems Prajit Dhara, ..., and K. Seshadreesan Physical Review A 2021 - 14 citations - Show abstract - Cite - PDF 2.0% topic match

2.0%

3.3

2001

[274] Cold trapped ions as quantum information processors Marek Šašura and V. Buzek Journal of Modern Optics 2001 - 75 citations - Show abstract - Cite - PDF 2.0% topic match

2.0%

0.1

2017

[275] Enabling trapped ion quantum computing with MEMS technology S. Crain, ..., and P. Maunz 2017 International Conference on Optical MEMS and Nanophotonics (OMN) 2017 - 1 citations - Show abstract - Cite 2.0% topic match

2.0%

0.0

2015

[276] Fast transport and accumulation of cold ion clouds in a multi-zone RF-trap M. Kamsap, ..., and M. Knoop Journal Not Provided 2015 - 0 citations - Show abstract - Cite Abstract: Transporting charged particles between multiple traps has become an important feature in quantum information, high-precision spectroscopy, cold chemistry or frequency metrology experiments. In this work, we study experimentally the transport and accumulation of a large ion sample in a multi-zone trap. Our trapping device is composed of two quadrupole (first and second zone) and an octupole (third zone) linear trap mounted inline. Our transport protocol consists in the variation of the potential barrier between two trap zones following a hyperbolic tangent gate [1]. The result shows that, for some well identified transport parameters, the transport efficiency from the first to the second zone (distance 23 mm) is independent of the ion number as long as this number is larger than 2000 ions and can reach 90% in such case. For clouds smaller than 2000 the efficiency is higher and can reach 100% in 100μs [2] (see figure 1). The number of leaving ions depends strongly on the duration of the transport protocol, alternating between 0 and 100% several times before these oscillations are damped. This oscillation of the fraction of leaving ions is not symmetric. Under certain experimental conditions, ions are transported from the first to the second part, but do not return from the second zone for the same set parameters. This asymmetry can be use used to accumulate ions in the second trap [3]. This technique allows to create very large ion clouds in the trap by accummulation. As the transport efficiency to the octupole is low, we use the described accumulation process to create a large ion sample in octupole trap. In the ideal case, the cold ion cloud in a linear octupole trap organizes in a hollow structure, formed of concentric tubes. However, in our octupole trap we observe some local harmonic potential wells where the ions samples organize themselves into very prolate strings or zigzag structures and to ellipse structures for large samples. This feature can be due to a defect in the geometry of the RF-electrodes. We exploit this observed structures to verify the theoretical laws for string, zigzag or ellipse structures. 2.0% topic match

2.0%

0.0

2022

[277] Bespoke pulse design for robust rapid two-qubit gates with trapped ions Seyed Shakib Vedaie, ..., and B. Sanders Physical Review Research 2022 - 0 citations - Show abstract - Cite - PDF 2.0% topic match

2.0%

0.5

2020

[278] Optical Sideband Cooling of a Radial Motional Mode of a Trapped 138Ba+ Ion Dahyun Yum, ..., and M. Mukherjee Journal of the Korean Physical Society 2020 - 2 citations - Show abstract - Cite 2.0% topic match

2.0%

0.2

2015

[279] New scalable microfabrication method for surface ion traps and experimental results with trapped ions S. Hong, ..., and D. Cho 2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS) 2015 - 2 citations - Show abstract - Cite 2.0% topic match

2.0%

3.3

2020

[280] Faster Schrödinger-style simulation of quantum circuits Aneeqa Fatima and I. Markov 2021 IEEE International Symposium on High-Performance Computer Architecture (HPCA) 2020 - 13 citations - Show abstract - Cite - PDF 2.0% topic match

2.0%

24.4

2021

[281] Ytterbium Nuclear-Spin Qubits in an Optical Tweezer Array Alec Jenkins, ..., and A. Kaufman Physical Review X 2021 - 64 citations - Show abstract - Cite - PDF 2.0% topic match

1.9%

0.0

2007

[282] Studies of Ion Dynamics and RF Heating in Miniature Ion Traps Keith C. Pelletier and J. Rabchuk Bulletin of the American Physical Society 2007 - 0 citations - Show abstract - Cite 1.9% topic match

1.9%

0.0

2000

[283] Decoherence, Measurement and Quantum Computing in Ion Traps S. Schneider https://doi.org/10.14264/157862 2000 - 0 citations - Show abstract - Cite Abstract: This thesis is concerned with various aspects of ion traps and their use as a quantum simulation and computation device. In its first part we investigate various sources of noise and decoherence in ion traps. As quantum information is very fragile, a detailed knowledge of noise and decoherence sources in a quantum computation device is essential. In the special case of an ion trap quantum computer we investigate the effects of intensity and phase noise in the laser, which is used to perform the gate operations. We then look at other sources of noise which are present without a laser being switched on. These are fluctuations in the trapping frequency caused by noise in the electric potentials applied to the trap and fluctuating electrical fields which will cause heating of the centre-of-mass vibrational state of the ions in the trap. For the case of fluctuating electrical fields we estimate the effect on a quantum gate operation. We then propose a scheme for performing quantum gates without having the ions cooled down to their motional ground state. The second part deals with various aspects of the use of ion traps as a device for quantum computation. We start with the use of ionic qubits as a measurement device for the centre-of-mass vibrational mode and investigate in detail the effect these measurements will have on the vibrational mode. If one wants to use quantum computation devices as systems to simulate quantum mechanics, it is of interest to know how to simulate say a k-level system with N qubits. We investigate the easiest case of this wider problem and look at how to simulate a three-level system (a so called trit) with two qubits in an ion trap quantum computer. We show how to get and measure a SU (3) geometric phase with this toy model. Finally we investigate how to simulate collective angular momentum models with a string of qubits in an ion trap. We assume that the ionic qubits are coupled to a thermal reservoir and derive a master equation for this case. We investigate the semiclassical limit of this master equation and, in the case for two qubits in the trap, determine the entanglement of the steady state. We also outline a way to find the steady state for the master equation using coherence vectors. 1.9% topic match

1.9%

0.9

2020

[284] Scalable quantum computation with fast gates in two-dimensional microtrap arrays of trapped ions Z. Mehdi, ..., and J. Hope Physical Review A 2020 - 4 citations - Show abstract - Cite - PDF 1.9% topic match

1.9%

0.1

2016

[285] Transport implementation of the Bernstein – Vazirani algorithm with ion qubits SDFallek, ..., and JMAmini Journal Not Provided 2016 - 1 citations - Show abstract - Cite 1.9% topic match

1.9%

0.0

2007

[286] Quantum information processing in a system of trapped ions D. Leibfried, ..., and D. Wineland https://doi.org/10.1364/ICQI.2007.ITHH4 2007 - 0 citations - Show abstract - Cite 1.9% topic match

1.9%

0.0

2015

[287] Toolbox for Microwave-driven Quantum Logic with Trapped Ions C. Wunderlich, ..., and S. Wölk Journal Not Provided 2015 - 0 citations - Show abstract - Cite 1.9% topic match

1.9%

0.1

2016

[288] Modular Universal Scalable Ion-trap Quantum Computer Jungsang Kim https://doi.org/10.21236/ad1016804 2016 - 1 citations - Show abstract - Cite 1.9% topic match

1.9%

0.4

2019

[289] Quantum Computing with Radiofrequency-driven Trapped Atomic Ions T. Sriarunothai, ..., and C. Wunderlich Quantum Information and Measurement (QIM) V: Quantum Technologies 2019 - 2 citations - Show abstract - Cite 1.9% topic match

1.9%

0.0

2010

[290] Scaling ion traps for quantum computing H. Uys, ..., and D. Wineland Journal Not Provided 2010 - 0 citations - Show abstract - Cite 1.9% topic match

1.8%

0.0

2020

[291] Single-phase ion trap with cylindrical zero-potential surface I. Kosternoi, ..., and S. Rydyi Journal of Physics: Conference Series 2020 - 0 citations - Show abstract - Cite 1.8% topic match

1.8%

1.7

2010

[292] Phonon-mediated entanglement for trapped ion quantum computing Kathy-Anne Brickman Soderberg and C. Monroe Reports on Progress in Physics 2010 - 24 citations - Show abstract - Cite 1.8% topic match

1.8%

1.1

2007

[293] Quadrupole Ion Traps and Trap Arrays: Geometry, Material, Scale, Performance Z. Ouyang, ..., and R. Cooks European Journal of Mass Spectrometry 2007 - 19 citations - Show abstract - Cite 1.8% topic match

1.7%

0.1

2006

[294] Recent experiments in trapped-ion quantum information processing at NIST J. Chiaverini, ..., and D. Wineland https://doi.org/10.1117/12.682633 2006 - 1 citations - Show abstract - Cite 1.7% topic match

1.7%

2.5

2017

[295] A Programmable Five Qubit Quantum Computer Using Trapped Atomic Ions S. Debnath Bulletin of the American Physical Society 2017 - 18 citations - Show abstract - Cite Abstract: Title of dissertation: A Programmable Five Qubit Quantum Computer Using Trapped Atomic Ions Shantanu Debnath, Doctor of Philosophy, 2016 Dissertation directed by: Professor Christopher Monroe Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology Quantum computers can solve certain problems more efficiently compared to conventional classical methods. In the endeavor to build a quantum computer, several competing platforms have emerged that can implement certain quantum algorithms using a few qubits. However, the demonstrations so far have been done usually by tailoring the hardware to meet the requirements of a particular algorithm implemented for a limited number of instances. Although such proof of principal implementations are important to verify the working of algorithms on a physical system, they further need to have the potential to serve as a general purpose quantum computer allowing the flexibility required for running multiple algorithms and be scaled up to host more qubits. Here we demonstrate a small programmable quantum computer based on five trapped atomic ions each of which serves as a qubit. By optically resolving each ion we can individually address them in order to perform a complete set of single-qubit and fully connected two-qubit quantum gates and also perform efficient individual qubit measurements. We implement a computation architecture that accepts an algorithm from a user interface in the form of a standard logic gate sequence and decomposes it into fundamental quantum operations that are native to the hardware using a set of compilation instructions that are defined within the software. These operations are then effected through a pattern of laser pulses that perform coherent rotations on targeted qubits in the chain. The architecture implemented in the experiment therefore gives us unprecedented flexibility in the programming of any quantum algorithm while staying blind to the underlying hardware. As a demonstration we implement the Deutsch-Jozsa and Bernstein-Vazirani algorithms on the five-qubit processor and achieve average success rates of 95 and 90 percent, respectively. We also implement a five-qubit coherent quantum Fourier transform and examine its performance in the period finding and phase estimation protocol. We find fidelities of 84 and 62 percent, respectively. While maintaining the same computation architecture the system can be scaled to more ions using resources that scale favorably (O(N2)) with the number of qubits N . A Programmable Five Qubit Quantum Computer Using Trapped Atomic Ions 1.7% topic match

1.7%

9.4

2008

[296] Trapped-ion quantum logic gates based on oscillating magnetic fields. C. Ospelkaus, ..., and D. Wineland Physical review letters 2008 - 152 citations - Show abstract - Cite - PDF 1.7% topic match

1.7%

0.2

2007

[297] Surface Planar Ion Chip for Linear Radio-Frequency Paul Traps Wang Jin-yin, ..., and Liu Liang Chinese Physics Letters 2007 - 4 citations - Show abstract - Cite 1.7% topic match

1.7%

0.4

2008

[298] Implementing segmented ion trap designs for quantum computing G. Imreh Journal Not Provided 2008 - 7 citations - Show abstract - Cite 1.7% topic match

1.7%

0.5

2003

[299] A small trapped-ion quantum register D. Kielpinski Journal of Optics B-quantum and Semiclassical Optics 2003 - 10 citations - Show abstract - Cite Abstract: We review experiments performed at the National Institute of Standards and Technology on entanglement, Bell's inequality and decoherence-free subspaces (DFSs) in a quantum register of trapped 9Be+ ions. The group of Dr David Wineland has demonstrated entanglement of up to four ions using the technique of M?lmer and S?rensen. This method produces the state (|?? + |?? )/?2 for two ions and the state (|???? + |???? )/?2 for four ions. The entanglement was generated deterministically in each shot of the experiment. Measurements on the two-ion entangled state violate Bell's inequality at the 8? level. Because of the high detector efficiency of the apparatus, this experiment closes the detector loophole for Bell's inequality measurements for the first time. This measurement is also the first violation of Bell's inequality by massive particles that does not implicitly assume results from quantum mechanics. The group also demonstrated measurement of an interferometric phase with precision better than the shot-noise limit using a two-ion entangled state. A large-scale version of this scheme could improve the signal-to-noise ratio of atomic clocks by orders of magnitude. Further experiments demonstrated reversible encoding of an arbitrary qubit, originally contained in one ion, into a DFS of two ions. The DFS-encoded qubit resists applied collective dephasing noise and retains coherence under ambient conditions 3.6 times longer than does an unencoded qubit. The encoding method, which uses single-ion gates and the two-ion entangling gate, demonstrates all the elements required for two-qubit universal quantum logic. Finally, we describe an architecture for a large-scale ion trap quantum computer. By performing logic gates on small numbers of ions trapped in separate regions of the array, we take advantage of existing techniques for manipulating small trapped-ion quantum registers while enabling massively parallel gate operation. Encoding the quantum information in the DFS removes decoherence associated with ion transport and imperfect clock synchronization. 1.7% topic match

1.7%

0.9

2020

[300] Strong-coupling quantum logic of trapped ions M. Sameti, ..., and F. Mintert Physical Review A 2020 - 4 citations - Show abstract - Cite - PDF 1.7% topic match

1.7%

1.4

2006

[301] Polymer-Based Ion Trap Chemical Sensor Meng Yu, ..., and W. Chappell IEEE Sensors Journal 2006 - 25 citations - Show abstract - Cite 1.7% topic match

1.7%

2.2

2020

[302] A Paul trap with sectored ring electrodes for experiments with two-dimensional ion crystals. M. Ivory, ..., and Boris Blinov The Review of scientific instruments 2020 - 10 citations - Show abstract - Cite - PDF 1.7% topic match

1.7%

0.2

2020

[303] Strong coupling of hybrid system between semiconductor quantum dots and superconducting resonator Yongqiang Xu, ..., and Mingbo Chen Chinese Science Bulletin 2020 - 1 citations - Show abstract - Cite Abstract: Quantum computing is a powerful way of improving computing efficiency. For some specific problems, quantum processor can exponentially reduce computation time compared to the classical computer. Cavity quantum electrodynamics, which studies the coherent interaction between photons in an optical cavity and atoms or other two-level systems, is of enormous significance to quantum computing and quantum information processing. The strong coupling regime where a cavity photon mode and an atom exchange a single quantum energy coherently has attracted extensive interest in varied experimental platforms and systems such as alkali atoms, Rydberg atoms, large spin ensembles, magnons, etc. The semiconductor gate-defined double quantum dot (DQD) system is one of the most promising platforms that possesses advantages of advanced micro-nano processing technology and outstanding scalability. Introducing the concept of cavity QED into superconducting circuits (circuit QED, cQED), provides an opportunity to study interaction between electrons confined in semiconductor DQD and photons trapped in a superconducting resonator. Reaching strong coupling regime in this hybrid system paves the way to large-scale network of quantum computing. electrical able to couple to with large coupling to charge noise the hybrid the decoherence rate of the larger than coupling rate, coupling years, different methods been proposed access the strong coupling regime. advantage of high-quality heterojunction structure, an overlapping gate architecture and a low-pass LC filter on the DC bias line, the decoherence of the charge qubit and microwave leakage of the resonator can be effectively suppressed. The coupling strength of the hybrid system can be improved utilizing a high impedance resonator which is comprised of high kinetic inductance materials. Spin, which does not interact directly with the electric field, is insensitive to charge noise and has much longer decoherence time than charge qubit. However, the weak interaction results in a small coupling rate between the spin and the photon. To solve this problem, the method of coherent hybridization between the spin and the charge state is proposed to improve the coupling strength. This hybridization can be achieved by applying a non-uniform magnetic field, utilizing spin-orbit interaction or spin exchange interaction. At present, both charge qubits and spin qubits have achieved strong coupling with the cavity and the coupling distance between long-range qubits is greatly expanded as long as millimeters. 1.7% topic match

1.7%

0.0

2009

[304] TWO-DIMENSIONAL ARRAY OF ION TRAPS ON A PLANAR CHIP 万金银, ..., and 刘亮 Journal Not Provided 2009 - 0 citations - Show abstract - Cite 1.7% topic match

1.6%

4.0

2012

[305] Dissipation-assisted quantum information processing with trapped ions. A. Bermudez, ..., and M. Plenio Physical review letters 2012 - 47 citations - Show abstract - Cite - PDF 1.6% topic match

1.6%

0.0

2021

[306] Proposal for a Timing Model of Ion Trap Quantum Architectures Alexander Hankin and Mark Hempstead Journal Not Provided 2021 - 0 citations - Show abstract - Cite 1.6% topic match

1.6%

23.3

2021

[307] Dual-Element, Two-Dimensional Atom Array with Continuous-Mode Operation Kevin Singh, ..., and H. Bernien Physical Review X 2021 - 65 citations - Show abstract - Cite - PDF 1.6% topic match

1.6%

2.7

2020

[308] Efficient Qubit Routing for a Globally Connected Trapped Ion Quantum Computer M. Webber, ..., and W. Hensinger Advanced Quantum Technologies 2020 - 12 citations - Show abstract - Cite - PDF 1.6% topic match

1.6%

2.2

2023

[309] Quantum computing with trapped ions: a beginner’s guide F. Bernardini, ..., and C. Ord'onez European Journal of Physics 2023 - 3 citations - Show abstract - Cite - PDF 1.6% topic match

1.6%

2.1

2012

[310] Fast transport, atom sample splitting and single-atom qubit supply in two-dimensional arrays of optical microtraps M. Schlosser, ..., and G. Birkl New Journal of Physics 2012 - 24 citations - Show abstract - Cite - PDF 1.6% topic match

1.6%

1.4

2012

[311] Molecular dynamics simulation study on trapping ions in a nanoscale Paul trap Xiongce Zhao and P. Krstic Journal Not Provided 2012 - 17 citations - Show abstract - Cite 1.6% topic match

1.6%

0.0

2021

[312] Diffractive Optics for Sensing and Networking with Trapped Ions V. Blūms https://doi.org/10.25904/1912/4072 2021 - 0 citations - Show abstract - Cite 1.6% topic match

1.5%

1.9

2023

[313] Characterization of fast ion transport via position-dependent optical deshelving C. R. Clark, ..., and K. R. Brown Physical Review A 2023 - 3 citations - Show abstract - Cite - PDF 1.5% topic match

1.5%

0.0

2017

[314] Integrated Readout at the Quantum-Classical Interface of Semiconductor Qubits A. Mahoney Journal Not Provided 2017 - 0 citations - Show abstract - Cite 1.5% topic match

1.5%

4.3

2014

[315] Individual addressing of trapped 171Yb+ ion qubits using a microelectromechanical systems-based beam steering system S. Crain, ..., and Jungsang Kim Applied Physics Letters 2014 - 42 citations - Show abstract - Cite 1.5% topic match

1.5%

0.0

2024

[316] Multi-junction surface ion trap for quantum computing J. Sterk, ..., and D. Stick Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 1.5% topic match

1.5%

3.5

2023

[317] A guided light system for agile individual addressing of Ba+ qubits with 10−4 level intensity crosstalk A. Binai-Motlagh, ..., and R. Islam Quantum Science and Technology 2023 - 5 citations - Show abstract - Cite - PDF 1.5% topic match

1.5%

0.0

2017

[318] Routing of Quantum States in 2D Lattices Cheng-Cheng Zhong Journal Not Provided 2017 - 0 citations - Show abstract - Cite 1.5% topic match

1.5%

0.0

2012

[319] Microscopic Surface-Electrode Ion Trap for Scalable Quantum Information Processing L. Chen 陈, ..., and M. Feng 冯 Chinese Physics Letters 2012 - 0 citations - Show abstract - Cite 1.5% topic match

1.5%

0.2

2019

[320] Design and construction of an ion trapping apparatus for quantum simulation experiments Nikhil Kotibhaskar Journal Not Provided 2019 - 1 citations - Show abstract - Cite 1.5% topic match

1.5%

0.0

1998

[321] Ion strings for quantum Gates, ..., and R. Blatt Journal Not Provided 1998 - 0 citations - Show abstract - Cite Abstract: Crystal structures of calcium ions have been prepared in a linear Paul trap. The trapped ions are laser-cooled by simultaneous resonant excitation near 397 nmand866 nm. Images of the fluorescing ions are obtained with a CCD camera and show the individual ions spatially resolved. Complex crystal structures of more than 60 ions have been observed whereas smaller crystals with up to 10 ionsarrange in a linear string. Measured distances between the ions in strings of different lengths are in good agreement with expected values obtained from a harmonic trap potential. The application of a calcium ion string for quantum computation is discussed. PACS: 32.80.Pj, 42.50.Vk Ion traps have been shown to provide an ideal environment for isolated quantum systems such as a single, trapped and laser-cooled atoms. Ion storage has long been applied to ultra-high precision spectroscopy and the development of frequency standards [1]. More recently, single trapped ions have been used to demonstrate and test some of the intriguing features of quantum mechanics [2, 3]. In particular, both the internal electronic state and the motional state of a trapped ion can be modified using laser light. Decoherence of internal superposition states is nearly negligible even for very long interaction times. To explore these properties, several schemes have been proposed for the preparation of non-classical states of motion in a trap [4]. Their experimental realization [2] promises further improvement for the precision of spectroscopic measurements [5, 6]. With almost perfect control of the quantum state of a single ion, attention has turned to systems of few ions with well-controlled interactions between them. Manipulations of their overall quantum state include the preparation of entangled states that have no classical counterpart. The possibility of entangling massive particles opens up many prospects for new experiments including measurements with Bell states and GHZ states [7] which would allow for new tests of quantum mechanics. Moreover, entanglement of particles will allow one to study quantum measurements such as the investigation of decoherence processes [3, 8] in more detail. A very exciting proposal is the application of linear ion traps and the collective quantum motion of a trapped string of ions for the realization of a quantum gate [9]. Quantum gates are the basic building blocks of a quantum computer and their operation relies fundamentally on the entanglement of internal degrees of freedom of the ions (electronic excitation) and their collective motion (vibrational excitation). A quantum computer works with quantum registers made up of quantum bits (qbits) which can be manipulated analogously to classical bits using gate operations. The quantum-mechanical analogue of a classical XOR gate, the so-called controlled-NOT gate operation, can be realized using a linear string of ions and a well-defined series of laser pulses to address different ions. It has been shown that a controlled-NOT gate operating on two ions is a realization of a universal quantum gate, so that in principle universal computations can be carried out using just the two-ion quantum gate and one-bit rotations [10]. The realization of these gate operations based on a string of ions would therefore be of fundamental interest and furthermore all basic algorithms could be tested using just a string of trapped ions. Many species of ions have been used for ion trapping, and strings in linear traps have been experimentally demonstrated with Be+ ions [11] andMg+ ions [12]. However, it was shown that40Ca+ is one of the most promising candidates for the realization of quantum gates, because of its mass, level structure, and transition frequencies and widths [13]. Furthermore, quantum gates require certain characteristics of the linear trap that have not been met in earlier experiments, in particular optical access from many directions. In this paper, we report the first trapping of strings of 40Ca+ ions in a linear trap, as a significant step towards the realization of a quantum gate. The novel trap that we use and describe in detail, has been designed especially for storing small numbers (up to a few tens) of 40Ca+ ions with the aim of producing linear strings and using them as a quantum register. The paper is organized as follows. In Sect. 1 we present the requirements for an application of ion strings to quantum computation in the particular case of 40Ca+ . We also highlight the advantages of the specific choice of this ion. In Sect. 2 the experimental setup is described and in 1.5% topic match

1.5%

7.8

2013

[322] Measurement-based quantum computation with trapped ions. B. Lanyon, ..., and C. Roos Physical review letters 2013 - 85 citations - Show abstract - Cite - PDF 1.5% topic match

1.5%

1.9

2014

[323] Mass selective ion transfer and accumulation in ion trap arrays. Yuzhuo Wang, ..., and W. Xu Analytical chemistry 2014 - 19 citations - Show abstract - Cite 1.5% topic match

1.5%

0.2

2001

[324] Quantum device circuits made of trapped ions K. Pahlke and W. Mathis Int. J. Circuit Theory Appl. 2001 - 4 citations - Show abstract - Cite 1.5% topic match

1.4%

2.2

2010

[325] Miniature Monolithic Rectilinear Ion Trap Arrays by Stereolithography on Printed Circuit Board Jeffrey D. Maas, ..., and W. Chappell Journal of Microelectromechanical Systems 2010 - 31 citations - Show abstract - Cite 1.4% topic match

1.4%

5.9

2011

[326] Robust trapped-ion quantum logic gates by continuous dynamical decoupling A. Bermudez, ..., and A. Retzker Physical Review A 2011 - 75 citations - Show abstract - Cite - PDF 1.4% topic match

1.4%

2.6

2020

[327] Coherently Manipulated 2D Ion Crystal in a Monolithic Paul Trap Ye Wang, ..., and Kihwan Kim Advanced Quantum Technologies 2020 - 10 citations - Show abstract - Cite 1.4% topic match

1.4%

0.5

2013

[328] Performance simulator based on hardware resources constraints for ion trap quantum computer Muhammad Ahsan, ..., and Jungsang Kim 2013 IEEE 31st International Conference on Computer Design (ICCD) 2013 - 5 citations - Show abstract - Cite 1.4% topic match

1.4%

0.7

2006

[329] Advanced ion trap development and ultrafast laser-ion interactions. M. Madsen Journal Not Provided 2006 - 13 citations - Show abstract - Cite 1.4% topic match

1.4%

0.8

2014

[330] Optimal electrode geometries for 2-dimensional ion arrays with bi-layer ion traps F. Krauth, ..., and J. Home Journal of Physics B: Atomic, Molecular and Optical Physics 2014 - 8 citations - Show abstract - Cite - PDF 1.4% topic match

1.4%

0.0

2015

[331] 2D Arrays of Ion Traps for Quantum Information Processing Kumph Muir Journal Not Provided 2015 - 0 citations - Show abstract - Cite 1.4% topic match

1.4%

0.0

2003

[332] A pr 2 00 3 Universal quantum gates based on both geometric and dynamic phases in quantum dots Kaiyu Yang, ..., and Z. D. Wang Journal Not Provided 2003 - 0 citations - Show abstract - Cite 1.4% topic match

1.4%

1.9

2000

[333] Quantum computing with trapped ions, atoms and light A. Steane and D. Lucas https://doi.org/10.1002/1521-3978(200009)48:9/11<839::AID-PROP839>3.0.CO;2-V 2000 - 47 citations - Show abstract - Cite - PDF 1.4% topic match

1.3%

0.6

2015

[334] Architecture Framework for Trapped-ion Quantum Computer based on Performance Simulation Tool Muhammad Ahsan Journal Not Provided 2015 - 6 citations - Show abstract - Cite 1.3% topic match

1.3%

15.0

2012

[335] Controlling fast transport of cold trapped ions. A. Walther, ..., and U. Poschinger Physical review letters 2012 - 182 citations - Show abstract - Cite - PDF 1.3% topic match

1.3%

0.0

2023

[336] Towards Photonic Integrated Ion Traps for high-performance Quantum Computing and Atomic Clocks Carl-Frederik Grimpe, ..., and Tanja E. Mehlstäubler Journal Not Provided 2023 - 0 citations - Show abstract - Cite 1.3% topic match

1.3%

2.4

2017

[337] Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps Seokjun Hong, ..., and Taehyun Kim Journal of Visualized Experiments : JoVE 2017 - 17 citations - Show abstract - Cite 1.3% topic match

1.3%

0.4

2017

[338] Single ion coupled to a high-finesse optical fibre cavity for cQED in the strong coupling regime Ezra Kassa Journal Not Provided 2017 - 3 citations - Show abstract - Cite Abstract: The research undertaken unites two distinct areas of quantum information processing: single ions stored in radio-frequency traps and single photons in optical fibres. Strings of ions are presently the most successful implementation of quantum computing, with elementary quantum algorithm and quantum simulations realised. The principal challenge in the field is to enhance the quantum processing power by scaling up current devices to larger systems. We pursue one of the most promising strategies: distributed quantum computation in which multiple small-scale ion processors are interlinked by exchanging photonic quantum bits via optical fibres. This requires a coherent quantum interface between ions and photons, mapping ionic to photonic quantum states and vice versa. To maximise fidelity and the success rate of the scheme, the interaction of ions and photons must take place in a microscopic optical cavity with high finesse. To this end, single 40Ca+ were trapped in a radio-frequency ion trap whose trapping electrodes are hollow cylinders. Optical fibres with mirrors machined on the facets are inserted into the electrodes to form a Fabry-Perot cavity. Because the fibres are shielded by the electrodes the detrimental distortion of the trapping field due to their presence is suppressed and ions can be trapped for several hours. 40Ca+ has a -type energy level scheme wherein the ion is cooled on the 42P1/2 ⇔ 42S1/2 transition and the cavity is tuned to the 42P1/2 ⇔ 32D3/2 transition. This thesis reports the successful coupling of single ions to a high finesse optical fibre based cavity, with coupling strength g = 2π · 4:6 MHz. The cavity has length 367 μm, finesse of 40,000 and linewidth 2k = 2π · 9:4 MHz. In this coupling regime, the enhancement of the ion's emission rate through the Purcell effect was observed. Further, anti-correlation was observed in the emission rates between the P1/2 ⇔ D3/2 and P1/2 ⇔ S1/2 transitions with an effective emission rate suppression of up to 60% in the latter transition. The built system offers greater promises. Once the position in the cavity mode has been optimised we expect to reach the long-sought after strong coupling regime with (g, k, y) = 2π · (12:2; 4:7; 11:2) MHz. 1.3% topic match

1.3%

0.4

2016

[339] Fast Gates Allow Large-Scale Quantum Simulation with Trapped Ions R. Taylor, ..., and J. Hope arXiv: Quantum Physics 2016 - 3 citations - Show abstract - Cite 1.3% topic match

1.3%

9.1

2009

[340] High-fidelity transport of trapped-ion qubits through an X-junction trap array. B. R. Blakestad, ..., and D. Wineland Physical review letters 2009 - 141 citations - Show abstract - Cite - PDF 1.3% topic match

1.3%

0.2

2009

[341] Modern applications of trapped ions M. Knoop, ..., and J. Eschner Journal of Physics B 2009 - 3 citations - Show abstract - Cite Abstract: Ion traps are fantastic tools to explore the world of electrons, atomic and molecular ions, or charged clusters, in the classical as well as in the quantum regime. Extremely long storage times allow probing even of single particles with very high precision. The mass selectivity of the trapping devices is exploited in many experiments, in particular for mass metrology. An overwhelming part of the experiments and ideas rely on the very high level of parameter control which is offered by the ion trap. Manipulation of individual ions and engineering of well defined quantum states are the fundamental techniques to take the experiments beyond existing frontiers and to unprecedented precision. This special issue presents state-of-the-art theory and experiments in a variety of tutorials, reviews and research papers. More than half of these contributions form a follow-up to the first workshop on Modern Applications of Trapped Ions held in Les Houches, France, in May 2008. A great number of topics is covered in atomic and molecular physics, with ion traps as a common tool. The variety of approaches is meant to make this digest a helpful resource to the whole ion trapping community. Among the contributions, four major – while still overlapping – domains can be identified. Novel ion trap design is the motor of future developments and applications. Spectacular progress has been made in the domain of quantum information processing, such as the realization of planar traps, which opens the way to large-scale quantum computation. In this issue, this enthralling subject is introduced by a tutorial and two review articles, completed by contributions on different experimental realizations. Precision measurements belong to a more traditional domain which nevertheless evolves at the forefront of research: metrology of frequencies and fundamental constants, measurements of g-factors or high-precision mass measurements are the foundations of atomic and molecular physics. The creation and investigation of cold molecular ions and clusters are among the fastest growing topics, leading to ultracold chemistry at the single-particle scale. The next edition of this meeting series will take the name of European Conference on Trapped Ions (ECTI) and will be held in the UK in 2010. We are looking forward to this event, which will offer the possibility to continue the fruitful interaction between research groups that employ ion traps in widely different contexts, and to take the next snapshot of this dynamic research area. 1.3% topic match

1.3%

0.6

2016

[342] Noise-induced transport in the motion of trapped ions C. Cormick and C. Schmiegelow Physical Review A 2016 - 5 citations - Show abstract - Cite - PDF 1.3% topic match

1.3%

0.0

2009

[343] Development of Two-Axial Bow-Tie Atom Trap with Near-Field Light Itou Haruhiko Journal Not Provided 2009 - 0 citations - Show abstract - Cite 1.3% topic match

1.3%

0.0

2023

[344] Quantum Computation and Quantum Simulation with Strings of Trapped Ca+ Ions Rainer Blatt 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) 2023 - 0 citations - Show abstract - Cite 1.3% topic match

1.3%

0.4

2011

[345] Quantum Networks with Atoms and Photons C. Monroe, ..., and K. Wright Journal of Physics: Conference Series 2011 - 5 citations - Show abstract - Cite 1.3% topic match

1.3%

0.2

2011

[346] RF planar ion trap for chemical sensing Jeffrey D. Maas and W. Chappell 2011 IEEE MTT-S International Microwave Symposium 2011 - 3 citations - Show abstract - Cite 1.3% topic match

1.2%

0.0

2015

[347] IN SITU PLASMA REMOVAL OF SURFACE CONTAMINANTS FROM ION TRAP ELECTRODES R. Haltli Journal Not Provided 2015 - 0 citations - Show abstract - Cite 1.2% topic match

1.2%

2.6

2012

[348] Spectroscopy and thermometry of drumhead modes in a mesoscopic trapped-ion crystal using entanglement. B. Sawyer, ..., and J. Bollinger Physical review letters 2012 - 33 citations - Show abstract - Cite - PDF 1.2% topic match

1.2%

2.3

2007

[349] Towards (scalable) quantum simulations in ion traps T. Schätz, ..., and Steffen Kahra Journal of Modern Optics 2007 - 38 citations - Show abstract - Cite 1.2% topic match

1.2%

0.0

2009

[350] Ions on a needle's tip - Traps with enhanced optical and physical access R. Maiwald, ..., and D. Wineland CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference 2009 - 0 citations - Show abstract - Cite 1.2% topic match

1.2%

0.1

2013

[351] Microfabrication Processes and Advancements in Planar Electrode Ion Traps as Mass Spectrometers B. J. Hansen Journal Not Provided 2013 - 1 citations - Show abstract - Cite Abstract: Microfabrication Processes and Advancements in Planar Electrode Ion Traps as Mass Spectrometers Brett J. Hansen Department of Electrical and Computer Engineering, BYU Doctor of Philosophy This dissertation presents advances in the development of planar electrode ion traps. An ion trap is a device that can be used in mass analysis applications. Electrode surfaces create an electric field profile that trap ionized molecules of an analyte. The electric fields can then be manipulated to mass-selectively eject ions out of the trap into a detector. The resulting data can be used to analyze molecular structure and composition of an unknown compound. Conventional ion traps require machined electrode surfaces to form the electric trapping field. This class of electrode presents significant obstacles when attempting to miniaturize ion traps to create portable mass spectrometers. Machined electrodes lose required precision in shape, smoothness, and alignment as trapping dimensions decrease. Simplified electrode geometries are essential to open the way to miniaturized ion traps. The planar electrode ion trap presents a simplified geometry that utilizes photolithography processes in its fabrication. Patterns of electrodes are patterned on a planar ceramic substrate. Electric fields generated by these patterns can be nearly identical to those of ideal ion traps. The microfabrication processes involve the challenge of patterning on ceramic, patterning on two sides of a substrate, and patterning on a substrate with high topographic features. Four successful designs of planar ion traps are presented in this work: the planar Paul, toroidal, coaxial, and linear ion trap. These four designs have different strengths and weaknesses. The planar Paul trap is simpler to design and operate, the toroidal has a larger ion storage volume and so can be a more sensitive instrument, and the coaxial trap is a hybrid planar Paul and toroidal trap. The linear trap combines the simplicity of the planar Paul trap with the increased storage capacity of the toroidal trap. This work presents how these four designs advance work in miniaturized ion traps. In addition, microfabrication techniques and trap performance for these designs are presented. 1.2% topic match

1.2%

4.1

2007

[352] Transport of ions in a segmented linear Paul trap in printed-circuit-board technology Gerhard Huber, ..., and Ferdinand Schmidt-Kaler New Journal of Physics 2007 - 69 citations - Show abstract - Cite - PDF 1.2% topic match

1.2%

113.7

2005

[353] Linear optical quantum computing with photonic qubits P. Kok, ..., and G. Milburn Reviews of Modern Physics 2005 - 2119 citations - Show abstract - Cite - PDF 1.2% topic match

1.2%

1.4

2023

[354] Ablation loading of barium ions into a surface-electrode trap X. Shi, ..., and I. L. Chuang Applied Physics Letters 2023 - 2 citations - Show abstract - Cite - PDF 1.2% topic match

1.2%

1.3

2019

[355] Hybrid electrostatic ion beam trap (HEIBT): Design and simulation of ion-ion, ion-neutral, and ion-laser interactions. A. Shahi, ..., and D. Strasser The Review of scientific instruments 2019 - 6 citations - Show abstract - Cite 1.2% topic match

1.2%

58.9

2002

[356] Architecture for a large-scale ion-trap quantum computer D. Kielpinski, ..., and D. Wineland Nature 2002 - 1303 citations - Show abstract - Cite 1.2% topic match

1.2%

0.8

2021

[357] Cold ion beam in a storage ring as a platform for large-scale quantum computers and simulators: Challenges and directions for research and development T. Shaftan and B. Blinov Physical Review Accelerators and Beams 2021 - 3 citations - Show abstract - Cite - PDF 1.2% topic match

1.2%

0.9

2021

[358] Quantum computer based on shuttling trapped ions W. Hensinger Nature 2021 - 3 citations - Show abstract - Cite 1.2% topic match

1.2%

0.5

2011

[359] Electrostatic Control and Transport of Ions on a Planar Trap for Quantum Information Processing N. Daniilidis Journal Not Provided 2011 - 7 citations - Show abstract - Cite 1.2% topic match

1.2%

0.2

2011

[360] An optical-fiber interface to a trapped-ion quantum computer T. H. Kim Journal Not Provided 2011 - 3 citations - Show abstract - Cite Abstract: The trapped-ion quantum computer is an atom-based implementation of a quantum computer that has successfully demonstrated numerous quantum algorithms and the potential for scalability. Fundamental to its operation is the short-range Coulombic interaction among its atomic ion registers, which has led to the development of local, single-chip devices. In this work, we demonstrate the integration of an optical fiber with a planar ion trap, and show the physical interaction between fiber light and the trapped-ion qubit. As the single-mode fiber is well-suited to the transport of single photons, the fiber interface (when augmented by an optical cavity) represents a means to link distantly located quantum computers through a common optical network. Hence, this work represents a step towards the paradigm of distributed quantum computing: self-contained, technically-simple processors may be optically linked together to perform large-scale quantum computation. This thesis is divided into two parts. In the first, we provide a thorough review of ion trap design and a detailed numerical analysis of trapped-ion motion. This theoretical discussion culminates with the development of an electronic technique that permits the arbitrary, in situ positioning of a trapped atom in the ion trap. The positioning ability is an enabling technology for optics integration as it allows for complete freedom in the alignment of the trapped atom with respect to the integrated element. In the second part, the construction of the experimental setup and the integrated “fibertrap” is described. In our experiment, a single 88Sr+ is trapped 670 μm above the end of an optical fiber in a cryogenic (8 K) surface-electrode ion trap. The fiber serves as an integrated source of laser light, which drives the quadrupole qubit transition of 88Sr+. Using in situ translation of the ion, the Gaussian beam profile of the fiber output is imaged, and the fiberion displacement, in units of the mode waist at the ion, is optimized to within 0.13± 0.10 of the mode center despite an initial offset of 3.30± 0.10 arising from fabrication. We also quantify the perturbative effects of the fiber dielectric on ion trap operation. Light-induced charging by 125 μWof 674 nm fiber light is measured as an induced electric field of∼ 10 V/m at the ion, with charging and discharging time constants of 1.6±0.3 s and 4.7±0.6 s. These measurements are of general importance to trapped-ion quantum computing, where the scalability of the platform depends crucially on the feasibility of on-chip optics integration. Thesis Supervisor: Prof. Isaac L. Chuang Title: Professor of Electrical Engineering and Computer Science Professor of Physics 1.2% topic match

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0.0

2012

[361] Coherent transfer between electron and nuclear spin qubits and their decoherence properties Richard M. Brown Journal Not Provided 2012 - 0 citations - Show abstract - Cite 1.1% topic match

1.1%

6.6

2005

[362] Experimental investigation of planar ion traps C. Pearson, ..., and I. Chuang Physical Review A 2005 - 124 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

None

[363] Qubits Based on Electrons on Helium No author found Journal Not Provided None - 0 citations - Show abstract - Cite Abstract: The basic building block of a quantum computer is called a qubit, and a large number of qubit systems have been suggested. However, so far only relatively primitive systems with a limited number of qubits have been tested. The most advanced demonstration so far is a seven qubit implementation of Shor's factoring algorithm. Qubit systems can be divided into three categories: i) those which are based on microscopic systems, such as molecules, trapped atoms, or photons, ii) those which are based on solid state systems, and iii) combined systems, where microscopic systems are trapped on a chip using modern nano-technology. All categories have advantages and disadvantages, especially the microscopic systems have long coherence times, but are hard to integrate into systems with a larger number of qubits. For the solid state systems, the situation is the opposite. So far the microscopic systems have demonstrated the most advanced state manipulation, however it is generally believed that an operating quantum computer would have to be based on qubits from category ii) or iii) due to the easier integration, and the possibility to couple the manipulation and read-out systems with more conventional electronics. In 1999, Platzman and Dykman [1] proposed that electrons on the surface of liquid helium (EOH) could be used as qubits, and hence form the basis of a quantum computer. This proposal is in between the atomic trap idea and a solid-state device. Indeed, electrons are localized in micro-traps. One can even put neutral atoms, instead of electrons, there. On the other hand, fabrication and operation is similar to those of solid-state devices. In fact, the principle of operation is very similar to that of the quantum dot quantum computer. The main difference is that our " quantum dot " is located in vacuum, isolated from the environment. Super-fluid helium provides an ideal surface for forming two-dimensional arrays of electrons. It is free from impurities and atomically smooth. Electrons above the surface are bound very weakly to it by their interaction with image charges in the bulk helium, forming a hydrogen like atom. The lowest energy-state has a mean separation of about 100Å from the surface. The 2D electrons, above a thick enough (0.5µm) helium film on a dielectric substrate, can be trimmed by metallic electrostatic gates patterned using conventional nanofabrication technique. This makes the system easily scalable. a b Fig.3. a) A schematic drawing of the qubit, including confinement … 1.1% topic match

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0.0

2000

[364] Quantum logic with an indium-magnesium ion chain S. Kohler, ..., and H. Walther Quantum Electronics and Laser Science Conference 2000 - 0 citations - Show abstract - Cite 1.1% topic match

1.1%

0.4

2004

[365] Thermally activated hopping of two ions trapped in a bistable potential well K. Abich, ..., and P. Toschek Journal of Optics B-quantum and Semiclassical Optics 2004 - 9 citations - Show abstract - Cite 1.1% topic match

1.1%

1.8

2023

[366] Trapping Ion Coulomb Crystals in an Optical Lattice D. Hoenig, ..., and T. Schaetz Physical Review Letters 2023 - 2 citations - Show abstract - Cite - PDF 1.1% topic match

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1.4

2014

[367] Squash: a scalable quantum mapper considering ancilla sharing M. Dousti, ..., and Massoud Pedram ArXiv 2014 - 14 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

0.0

2018

[368] Demonstration and Characterization of Scalable Quantum Gate Operations with Trapped Ion Qubits Chao Fang, ..., and Jungsang Kim Bulletin of the American Physical Society 2018 - 0 citations - Show abstract - Cite 1.1% topic match

1.1%

2.2

2019

[369] Two-Dimensional Arrays of RF Ion Traps with Addressable Interactions M. Kumph, ..., and R. Blatt Journal Not Provided 2019 - 12 citations - Show abstract - Cite 1.1% topic match

1.1%

1.8

2012

[370] Large 2D Coulomb crystals in a radio frequency surface ion trap B. Szymanski, ..., and L. Guidoni arXiv: Quantum Physics 2012 - 23 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

0.2

2009

[371] Recent experiments in quantum information with trapped ions T. Coudreau Journal of Physics B: Atomic, Molecular and Optical Physics 2009 - 3 citations - Show abstract - Cite 1.1% topic match

1.1%

0.2

2009

[372] Remote ion traps for quantum networking: two-photon interference and correlations F. Rohde Journal Not Provided 2009 - 3 citations - Show abstract - Cite Abstract: Irhe field of quantum information processing (QIP) has evolved rapidly in the last decade. Strings of single rapped ions have proven to be one of the most promising candidates for the implementation of quantum information processing tasks such as universal gate operations or eleportation. Besides the challenge of scaling up these quantum processors to a larger number of ions, another important problem is to interconnect different processors on a macroscopic scale and integrate them into a quantum network. Irhis thesis describes the construction of a new experiment dedicated to the study of quantum communication and quantum networking with laser cooled single ions and first experiments carried out with it. Two linear Paul traps for 4DCa+ have been set up at a distance of one meter. Two-photon interference of the fluorescence light of two remotely trapped single ions could be observed with a contrast of 80%. This proves the suitability of the setup for the creation of remote entanglement, an important building block for quantum networking. Irhe first part of the thesis describes the experimental setup that ~as constructed from scratch. It consists of a newly designed trap apparatus and the laser setup. The apparatus was designed to ulfill the requirement of interferometric stability, which is a pre requisite for one remote entanglement protocol. Another important feature are two high numerical aperture in-vacuum lenses hat optimize the collection efficiency of photons scattered by he ions. In order to frequency-stabilize the laser systems, a ransfer stabilization scheme referenced to a transition in atomic ~s has been developed. The stabilization chain comprises low-cost open transfer cavities and offers very good long term stability. Irhe second part of the thesis presents the experimental results starting with the calibration of the two traps through excitation spectra. After that, the realization of two-photon interference rom single ions under continuous excitation is presented. The model analysis of the data usinq eiqht level Bloch equations reveals the individual coherence properties of the interfering ~ingle photons. The coherence time of the fluorescence light does not exceed 20- ns, indicating that incoherent scattering is ~ominant. fA,n analysis of the efficiency of methods for remote entanglement relying on two-photon and single-photon interference, focussing on he role of the detection efficiency is discussed. It is revealed hat Single-photon schemes are more efficient if the detection ~fficiency is low (like in present experiments). The created setup is suitable for the realization of both types of protocols, based pn single- and two-photon interference. Jhe conditioned dynamics of photon emission of a single ion are studied using correlation functions. The engineering of second ~rder correlation functions used as a tool which relies on conditional dynamics, might have interesting applications in probabilistic quantum information processing. pingle-atom single-photon interfaces are an important application in quantum networks. As opposed to the emission of single photons by single atoms, the absorption of Single photons by single atoms cannot be controlled in a similar way. With the future goal of realizing a heralded absorption of a single photon by a single atom, one of the ion traps was linked to a Spontaneous Parametric Down Conversion source. Quantum jump spectroscopy on a single ion using single photons from this source is shown. Finally the reported two-photon interference could be extended also to pulsed excitation. This marks an important technological step towards remote entanglement. 1.1% topic match

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0.0

2015

[373] Atomic and molecular ions with photon resonators for quantum information science M. Shi Journal Not Provided 2015 - 0 citations - Show abstract - Cite 1.0% topic match

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1.9

2015

[374] Shortcuts to adiabaticity for an ion in a rotating radially-tight trap M. Palmero, ..., and J. G. Muga New Journal of Physics 2015 - 17 citations - Show abstract - Cite - PDF 1.0% topic match

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5.9

2016

[375] Minimally complex ion traps as modules for quantum communication and computing R. Nigmatullin, ..., and S. Benjamin New Journal of Physics 2016 - 49 citations - Show abstract - Cite - PDF 1.0% topic match

1.0%

0.1

2004

[376] Modelling of Miniature Ion Traps for Quantum Computing B. Brkić, ..., and J. Ralph https://doi.org/10.1063/1.1834405 2004 - 2 citations - Show abstract - Cite 1.0% topic match

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1.0

2002

[377] Trapped-ion quantum logic utilizing position-dependent ac Stark shifts P. Staanum and M. Drewsen Physical Review A 2002 - 22 citations - Show abstract - Cite - PDF 1.0% topic match

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0.6

2005

[378] Design and Characteristic Measurement of Miniature Three-Segment Linear Paul Trap T. Furukawa, ..., and S. Urabe Japanese Journal of Applied Physics 2005 - 11 citations - Show abstract - Cite 1.0% topic match

1.0%

1.5

2022

[379] Non-adiabatic quantum control of quantum dot arrays with fixed exchange using Cartan decomposition David W. Kanaar, ..., and J. Kestner Philosophical Transactions of the Royal Society A 2022 - 3 citations - Show abstract - Cite - PDF 1.0% topic match

1.0%

3.1

2014

[380] Fast transport of mixed-species ion chains within a Paul trap M. Palmero, ..., and J. G. Muga Physical Review A 2014 - 31 citations - Show abstract - Cite - PDF 1.0% topic match

1.0%

0.0

2019

[381] Holographic Optical Manipulation of Trapped Ions for Quantum Simulation C. Shih Journal Not Provided 2019 - 0 citations - Show abstract - Cite Abstract: Trapped ion is one of the leading platforms for quantum simulation experiment due to its long coherence time and high fidelity state initialization, detection, and manipulation. To individually address ions at a single-ion level, it requires sophisticated optical engineering. In the thesis, we present a novel single qubit addressing system that is immune to imperfections of optical imaging and can scale to different size of the system. The technique is based on digital light processing with a commercially available digital micro-mirror device (DMD). A DMD is a 2D array that consists of tiny micro-mirrors that can be individually manipulated. It is commonly used in movie projectors to modulate the intensity of the light to create the desired image. However, using this technology to ions will require more sophisticated controls over optical wavefronts of the laser beams, for example, the necessity to manipulate the optical phase. It can be achieved by using the DMD as a programmable hologram, which can then be used to characterize and compensate for any imaging imperfections as well. We developed a new iterative Fourier transform algorithm (IFTA) for calculating the holograms. In the simulation, our algorithm shows more than one order of magnitude improvement in accuracy comparing to previously proposed algorithms. We experimentally demonstrated this holographic beam shaping technique with the optical aberration being compensated. The laser we used in the experiment is in the ultraviolet (UV) regime that is close to the optical transition used for manipulating 171Yb qubits. The short wavelength makes it more susceptible to environmental disturbance. Also, we proposed and experimentally demonstrated a new scheme that enables holographic controls over lights with multiple laser frequencies simultaneously by combing the DMD with an acousto-optical modulator (AOM). The AOM splits the light and illuminates different zones of the DMD. Each zone has its own hologram forming one frequency channel for addressing. This opens the possibility to engineer more complex Hamiltonian for quantum simulation. For example, we can engineer arbitrary spin-spin interaction graphs by applying the Mølmer-Sørensen scheme on this new setup. 1.0% topic match

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0.8

2015

[382] An ion trap built with photonic crystal fibre technology. F. Lindenfelser, ..., and J. Home The Review of scientific instruments 2015 - 8 citations - Show abstract - Cite - PDF 1.0% topic match

1.0%

4.0

2008

[383] Individual addressing of ions using magnetic field gradients in a surface-electrode ion trap Shannon X. Wang, ..., and I. Chuang Applied Physics Letters 2008 - 63 citations - Show abstract - Cite - PDF 1.0% topic match

1.0%

1.0

2023

[384] Lightning Talk: Scaling Up Quantum Compilation – Challenges and Opportunities Jason Cong 2023 60th ACM/IEEE Design Automation Conference (DAC) 2023 - 1 citations - Show abstract - Cite 1.0% topic match

1.0%

0.9

1998

[385] INDIVIDUAL ADDRESSING AND STATE READOUT OF TRAPPED IONS UTILIZING RF MICROMOTION Dietrich Leibfried Physical Review A 1998 - 24 citations - Show abstract - Cite - PDF 1.0% topic match

1.0%

0.0

2024

[386] Iterative Confinement of Ions via the Quantum Zeno Effect: Probing Paradoxical Energy Consequences Varqa Abyaneh Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 1.0% topic match

1.0%

None

[387] Motional effects of single trapped atomic/ionic qubit L. You and h̄ωeg mxω Journal Not Provided None - 0 citations - Show abstract - Cite Abstract: Since the pioneering work by Shor [1] on efficient prime factorization with a quantum computer in 1994, we have witnessed an explosive growth of interests in quantum information and computing. Although still largely a theoretical field, solid progress in experimental efforts have been made within the last few years. Most notably, pure state based quantum gate implementation [2], demonstrations of quantum teleportation [3], and GHZ state synthesis [4] have stimulated more vigorous experimental efforts. Two of the most interesting proposals for potentially large scale quantum computing were suggested by the same Innsbruck group, based on trapped ions [5] and cavity QED with atoms [6]. Various implementations of these ideas are actively pursued in many experiments around the world. In their original analysis as presented in [5,6], individual qubits are coded in electronic degrees states of atoms/ions, and coherent evolution of the system state requires the qubits to be in selected motional pure states. Experimentally, one needs to attain the strong binding limit [7] and cooling to the motional ground state is also required [8]. As is well known, these limits are difficult to maintain due to various decoherence processes [9] which heat up the motional degrees of freedom. Further more, maintaining motional ground state becomes problematic when strong confinement is not satisfied. Several ideas were proposed recently for computing with ‘hot’ qubits [10]. This paper attempts to provide quantitative answers to motional effects (ME) on electronically encoded quantum states [11]. It is the first step towards a thorough investigation of the ME. The paper is organized as follows. First our model is presented. We then discuss analytically the decoherence of the ME for an unknown electronic encoded qubit. Finally we present numerical results to support our understanding. In forthcoming papers, we will study the decoherence due to ME on multiqubit entanglement creation, e.g, the effect on the conditional logic operation CNOT. We consider a single harmonically bound two state atom described by the Hamiltonian [12–14] 1.0% topic match

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0.5

2006

[388] Cluster States from Quantum Logic Gates with Trapped Ions in Thermal Motion Yang Wen-xing, ..., and Li Jia-hua Chinese Physics Letters 2006 - 9 citations - Show abstract - Cite 1.0% topic match

1.0%

0.0

2020

[389] Issues using equivalent circuit elements to describe trapped ions N. V. Horne and M. Mukherjee arXiv: Quantum Physics 2020 - 0 citations - Show abstract - Cite 1.0% topic match

1.0%

0.0

2013

[390] Towards Simulating the Transverse Ising Model in a 2D Array of Trapped Ions B. Sawyer Bulletin of the American Physical Society 2013 - 0 citations - Show abstract - Cite 1.0% topic match

0.9%

2.3

2002

[391] Diffusion and synchronization in an ion-trap resonator H. Pedersen, ..., and D. Zajfman Physical Review A 2002 - 51 citations - Show abstract - Cite Abstract: Ion traps are able to trap charged particles for a long time, and they have been successfully applied in several areas of physics @1#. Among the many applications of ion traps is their use for atomic and molecular physics, such as for the study of metastable states @2#, and cluster cooling @3#. The dynamics of trapped ions has drawn much attention since the early days of ion trapping @ 4‐7 #. One item of interest in these systems stems from collective effects which can be studied both in the laboratory under well defined conditions and with developed theoretical methods. Recently, a different class of ion traps has been developed @ 8‐1 2#, in which ions oscillate between a pair of electrostatic mirrors, much like photons in an optical resonator. The trapped ions have kinetic energies of a few keV in the central part of the trap while inside the mirrors they have only a few meV near their turning points, where they are also subject to radial focusing forces. Thus, the density of ions changes strongly within the trap, due both to their slowing down inside the mirrors and to the radial focusing. This density can increase by two to three orders of magnitude inside the mirrors as compared to its value in the field-free region of the trap. In a previous publication @13#, we have investigated the stability criteria and ion loss mechanisms for ion beams stored in such a trap. Two regions of stability were experimentally identified, and these were found by both numerical simulation and optical models to be distinct modes with very different dynamical properties. Recently, we have also demonstrated @14# that the trapped ions can synchronize their motion under certain conditions. This effect was identified by observing that the size of a packet of ions remained constant for a practically unlimited time, i.e., the debunching that is usually observed did not occur. The synchronization effect was attributed to the repulsive Coulomb interaction between the ions @14#. In this paper, we provide experimental evidence for the dynamics of both diffusion and synchronization in our electrostatic trap by experimentally investigating a particular set of trap configurations. We numerically study two onedimensional model systems, which illustrate the dynamics of diffusion and synchronization. Finally, we describe in more detail the dynamical basis of diffusion and synchronization and compare the results to numerical trajectory calculations. We find that the repulsive Coulomb interaction between the ions, in combination with the kinematical properties dictated by the electrostatic fields, can either enhance the diffusion, and hence speed up the transition to a steady state beam, or induce so strong a correlation between the ions that ion motion synchronization and self-ordering phenomena emerge. 0.9% topic match

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2023

[392] HiSEP-Q: A Highly Scalable and Efficient Quantum Control Processor for Superconducting Qubits Xiaorang Guo, ..., and Martin Schulz 2023 IEEE 41st International Conference on Computer Design (ICCD) 2023 - 0 citations - Show abstract - Cite - PDF Abstract: Quantum computing promises an effective way to solve targeted problems that are classically intractable. Among them, quantum computers built with superconducting qubits are considered one of the most advanced technologies, but they suffer from short coherence times. This can get exaggerated when they are controlled directly by general-purpose host machines, which in turn leads to the loss of quantum information. To mitigate this, we need quantum control processors (QCPs) positioned between quantum processing units (QPUs) and host machines to reduce latencies. However, existing QCPs are built on top of designs with no or inefficient scalability, requiring a large number of instructions when scaling to more qubits. In addition, interactions between current QCPs and host machines require frequent data transmissions and offline computations to obtain final results from hundreds of repeated executions, which limits the performance of quantum computers.In this paper, we propose a QCP — called HiSEP-Q — featuring a novel quantum instruction set architecture (QISA) and its microarchitecture implementation. For efficient control, we utilize mixed-type addressing modes and mixed-length instructions in HiSEP-Q, which provides an efficient way to concurrently address more than 100 qubits. Further, for efficient read-out and analysis, we develop a novel onboard accumulation and sorting unit, which eliminates the data transmission of raw data between the QCPs and host machines and enables real-time result processing. Compared to the state-of-the-art, our proposed QISA achieves at least 62% and 28% improvements in encoding efficiency with real and synthetic quantum circuits, respectively. We also validate the microarchitecture on a field-programmable gate array (FPGA), which exhibits low power and resource consumption, even as the number of qubits scales to 100. Both hardware and ISA evaluations demonstrate that HiSEP-Q features high scalability and efficiency toward the number of controlled qubits. 0.9% topic match

0.9%

0.8

2011

[393] Filtering of matter wave vibrational states via spatial adiabatic passage Y. Loiko, ..., and J. Mompart 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC) 2011 - 11 citations - Show abstract - Cite - PDF 0.9% topic match

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0.1

2009

[394] Integrated quantum information science with photons A. Politi, ..., and J. O'Brien CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference 2009 - 1 citations - Show abstract - Cite 0.9% topic match

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0.0

2019

[395] Integrated optical trapped-ion quantum logic K. Mehta Journal Not Provided 2019 - 0 citations - Show abstract - Cite 0.9% topic match

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1.8

2021

[396] RF Performance Benchmarking of TSV Integrated Surface Electrode Ion Trap for Quantum Computing P. Zhao, ..., and C. S. Tan IEEE Transactions on Components, Packaging and Manufacturing Technology 2021 - 5 citations - Show abstract - Cite 0.9% topic match

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3.9

2015

[397] Assembling a ring-shaped crystal in a microfabricated surface ion trap B. Tabakov, ..., and D. Stick arXiv: Quantum Physics 2015 - 37 citations - Show abstract - Cite - PDF 0.9% topic match

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0.3

2004

[398] Algorithm-based analysis of collective decoherence in quantum computation S. Utsunomiya, ..., and Y. Yamamoto Journal of The Optical Society of America B-optical Physics 2004 - 6 citations - Show abstract - Cite - PDF 0.9% topic match

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0.0

2015

[399] Title Quantum networks with atoms and photons Permalink C. Monroe, ..., and K. Wright Journal Not Provided 2015 - 0 citations - Show abstract - Cite Abstract: Trapped atomic ions are standards for quantum information processing, as all of the fundamental quantum operations have been demonstrated in small collections of atoms. Current work is concentrated on scaling ion traps to larger numbers of interacting qubits and the generation of massive entangled states. We discuss progress in the quantum networking of trapped atomic ions, using the Coulomb interaction for demonstrations of simple quantum simulations of magnetism, ultrafast laser pulses for entanglement, and finally probabilistic photonic interactions to bridge entanglement over long distances. Trapped atomic ions form ideal quantum systems for the fabrication of quantum information devices and the study of manybody quantum states. Trapped ion qubits enjoy an extreme level of isolation from the environment, they can be entangled through their local Coulomb interaction, and they can be measured with near-perfect efficiency with the availability of cyclic optical transitions [1]. Recent effort in this area has concentrated on the scaling to large numbers of trapped ion qubits, and there is continued progress on the use of monolithic chip traps and integrated optical interfaces for future ion-based quantum devices [2]. Here we highlight new directions in the quantum networking of trapped atomic ion systems undertaken by the JQI-Maryland Ion Trap Group. These efforts do not simply refine and improve earlier approaches of entanglement generation, but represent new methods for the generation of entangled networks with larger systems, at ultrafast times scales, and over macroscopic distances. In all experiments, we confine atomic 171Yb+ ions in linear radiofrequency (Paul) ion traps, and store effecive spin−1/2 qubits in the S1/2 ground state “clock” hyperfine levels, labeled by |↑〉 (F = 1,mF = 0) and |↓〉 (F = 0,mF = 0) and separated by a frequency of ν0 = 12.64281 GHz [3]. The qubits are initialized and detected with laser radiation near resonant with the S1/2−P1/2 transition at a wavelength around 369.5 nm. We coherently couple the qubit levels via optical stimulated Raman transitions using off-resonant laser radiation. This interaction can be accompanied by optical dipole forces in certain applications. Ultrafast Quantum Gates The Raman laser for coherent operations on 171Yb+ qubits is a mode-locked Nd:YVO4 oscillator and amplifier that is frequency tripled to 355 nm. This wavelength is ideal for the 171Yb+ system, 21st International Conference on Laser Spectroscopy – ICOLS 2013 IOP Publishing Journal of Physics: Conference Series 467 (2013) 012008 doi:10.1088/1742-6596/467/1/012008 Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd 1 as its large detunings from the 2P states (33 THz blue of P1/2 and 67 THz red of P3/2) amount to negligible spontaneous emission and differential AC Stark shifts [4]. Furthermore, the large bandwidth of the pulses easily covers the hyperfine splitting, and the resulting frequency comb from a pulse train allows high resolution resolved-sideband control of trapped ion motion [5], similar to conventional setups involving cw lasers [6]. For higher Raman laser power, we have shown that a solitary pulse with a typical duration of about 10 ps can drive transitions between the two qubit states [4]. Such an interaction ushers a new regime of ultrafast atomic qubit control, and when applied to many trapped ions it has great promise for the operation of ultrafast entangling gates where the gate speed is faster than the period of harmonic trap motion [7, 8]. Toward this end, we apply counterpropagating pulses to the ions, with orthogonal linear polarizations. This creates a spatially modulated Rabi frequency that is the basis of a spindependent momentum kick [4]. We have verified the coherence of this process and resulting ultrafast qubit-motion entanglement by implementing a Ramsey interferometer with a single trapped ion. We first create a superposition of spin states with microwaves (first Ramsey π/2 pulse), then apply two ultrafast spin-dependent kicks with invidual ultrafast laser pulses. After closing the interferometer (second Ramsey π/2 pulse), we expect fringes only when the kicks are sepated by integral multiples of the trap period, because otherwise the momentum kicks are not parallel, and the motional wavepackets do not recombine. This periodic revival of qubit contrast is shown in Fig 1, showing the coherence of the kick process and the entanglement of spin and motion [9]. 4 0.0 0.2 0.4 0.6 0.8 1.0 0.9% topic match

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0.4

2001

[400] Ion dynamics and oscillation frequencies in a linear combined trap T. Nakamura, ..., and H. Schuessler Journal of Applied Physics 2001 - 10 citations - Show abstract - Cite 0.9% topic match

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0.0

2021

[401] Failure Modes in Microfabricated Ion Trap Devices for Quantum Information Science M. Blain, ..., and M. Revelle EDFA Technical Articles 2021 - 0 citations - Show abstract - Cite 0.9% topic match

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0.0

2009

[402] Quantum Phase Transitions with Spin Frustration in a Trapped Ion System Kihwan Kim, ..., and C. Monroe Bulletin of the American Physical Society 2009 - 0 citations - Show abstract - Cite 0.9% topic match

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0.0

2011

[403] Imaging of trapped ions with wavelength-scale resolution using a microfabricated optic A. Jechow, ..., and D. Kielpinski 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC) 2011 - 0 citations - Show abstract - Cite 0.9% topic match

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5.2

2019

[404] A cryogenic radio-frequency ion trap for quantum logic spectroscopy of highly charged ions. T. Leopold, ..., and P. Schmidt The Review of scientific instruments 2019 - 29 citations - Show abstract - Cite - PDF 0.9% topic match

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0.2

2011

[405] Micromotion Compensation and Photoionization of Ions in a Linear Trap X. Yi, ..., and F. Mang Chinese Physics Letters 2011 - 3 citations - Show abstract - Cite 0.8% topic match

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6.0

2010

[406] Imaging of trapped ions with a microfabricated optic for quantum information processing. E. Streed, ..., and D. Kielpinski Physical review letters 2010 - 84 citations - Show abstract - Cite - PDF 0.8% topic match

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5.2

2004

[407] Spin-dependent forces on trapped ions for phase-stable quantum gates and entangled states of spin and motion. P. Haljan, ..., and Christopher Monroe Physical review letters 2004 - 103 citations - Show abstract - Cite - PDF 0.8% topic match

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12.9

2007

[408] Suppression of heating rates in cryogenic surface-electrode ion traps. J. Labaziewicz, ..., and I. Chuang Physical review letters 2007 - 221 citations - Show abstract - Cite - PDF 0.8% topic match

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3.0

2021

[409] Shuttle-Exploiting Attacks and Their Defenses in Trapped-Ion Quantum Computers Abdullah Ash Saki, ..., and Swaroop Ghosh IEEE Access 2021 - 9 citations - Show abstract - Cite - PDF 0.8% topic match

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0.0

2012

[410] Abstract Submitted for the DAMOP11 Meeting of The American Physical Society Pulsed laser gates for trapped atomic qubits1 CRYSTAL SENKO, C. Senko, ..., and C. Monroe Journal Not Provided 2012 - 0 citations - Show abstract - Cite 0.8% topic match

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0.1

1997

[411] Spectroscopy and quantum optics with ion traps R. Thompson, ..., and D. M. Segal Physica Scripta 1997 - 3 citations - Show abstract - Cite 0.8% topic match

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0.3

2015

[412] An ion-cavity interface for quantum networks T. Northup, ..., and R. Blatt https://doi.org/10.1117/12.2189924 2015 - 3 citations - Show abstract - Cite 0.8% topic match

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0.3

2021

[413] A deterministic single ion fountain Felix Stopp, ..., and F. Schmidt-Kaler Quantum Science & Technology 2021 - 1 citations - Show abstract - Cite - PDF 0.8% topic match

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0.6

2021

[414] A scalable helium gas cooling system for trapped-ion applications F. R. Lebrun-Gallagher, ..., and Winfried Hensinger Quantum Science & Technology 2021 - 2 citations - Show abstract - Cite - PDF 0.8% topic match

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1.3

2007

[415] MEMS-based optical beam steering system for quantum information processing in two-dimensional atomic systems. C. Knoernschild, ..., and Jungsang Kim Optics letters 2007 - 21 citations - Show abstract - Cite - PDF 0.8% topic match

0.8%

2.2

1997

[416] Experimental preparation and measurement of quantum states of motion of a trapped atom D. Leibfried, ..., and D. Wineland Journal of Modern Optics 1997 - 59 citations - Show abstract - Cite 0.8% topic match

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0.0

2015

[417] Application of OMEMS technology in trapped ion quantum computing S. Crain, ..., and P. Maunz 2015 International Conference on Optical MEMS and Nanophotonics (OMN) 2015 - 0 citations - Show abstract - Cite 0.8% topic match

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0.5

2014

[418] Universal logic gates for quantum-dot electron-spin qubits using trapped quantum-well exciton polaritons S. Puri, ..., and Y. Yamamoto Physical Review B 2014 - 5 citations - Show abstract - Cite - PDF 0.8% topic match

0.8%

0.0

2008

[419] Towards Optical Quantum Information Processing P. Rohde Journal Not Provided 2008 - 0 citations - Show abstract - Cite 0.8% topic match

0.8%

1.4

2006

[420] Design and Characterization of MEMS Micromirrors for Ion Trap Quantum Computation Changsoon Kim, ..., and Jungsang Kim IEEE/LEOS International Conference on Optical MEMS and Their Applications Conference, 2006. 2006 - 25 citations - Show abstract - Cite 0.8% topic match

0.8%

3.8

2023

[421] Hybrid discrete-continuous compilation of trapped-ion quantum circuits with deep reinforcement learning Francesco Preti, ..., and H. Briegel Journal Not Provided 2023 - 4 citations - Show abstract - Cite - PDF 0.8% topic match

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0.1

2004

[422] Further quantum-gate methods using selective displacement of trapped ions Marek Šašura and A. Steane arXiv: Quantum Physics 2004 - 3 citations - Show abstract - Cite - PDF 0.8% topic match

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1.1

2023

[423] Sequential quantum simulation of spin chains with a single circuit QED device Yuxuan Zhang, ..., and A. Potter Physical Review A 2023 - 1 citations - Show abstract - Cite - PDF 0.8% topic match

0.8%

None

[424] Geometric Construction of Multi-bit Quantum Gates K. Mlmer Journal Not Provided None - 0 citations - Show abstract - Cite 0.8% topic match

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2.4

2023

[425] Qubit readout enabled by qubit cloaking M. Muñoz-Arias, ..., and A. Blais Physical Review Applied 2023 - 3 citations - Show abstract - Cite - PDF 0.8% topic match

0.7%

0.3

2010

[426] Measurement-Selected Ensembles in Trapped-Ion Qubits M. Curtis Journal Not Provided 2010 - 4 citations - Show abstract - Cite Abstract: This thesis describes the development of two segmented ion trap systems for quantum information experiments and investigations of novel quantum measurements. We report successful loading of 40Ca+ ions in one of the trap systems and the successful demonstration of the partial collapse and revival of the wavefunction of an ion qubit using the system. We describe the operation of ion trap systems with segmented electrodes and develop a practical strategy for choosing the voltages to apply to the electrode segments to obtain desired trapping potentials and correct for stray fields. The linearity of the Laplace equation results in a linear map from the configuration space of electrode voltages to the function space of electric potentials in the trap. We decompose the electrode configuration space into basis vectors whose corresponding potentials have intuitive meaning. We describe attempts at loading Ca+ ions in a micro-scale segmented ion trap built at Lucent Technologies. The Lucent Trap is a planar ion trap fabricated using lithographic techniques on a silicon substrate. We experienced several problems with this trap and were unable to successfully load ions in it. A second ion trap, built at the University of Liverpool, is described. The Liverpool trap has miniature segmented electrodes constructed using conventional machining. We describe loading of Ca+ ions, and the demonstration of stable trapping with long ion lifetimes and stable electric and magnetic fields. The Liverpool trap is used to demonstrate non-projective “partial” measurements of a qubit wavefunction, which results in non-unitary, non-projective evolution of the wavefunction dubbed partial collapse. This effect can be reversed by performing another partial measurement, but only if the second measurement results in a particular outcome. When this outcome is observed, the qubit wavefunction is restored to the original state. An exact restoration occurs when both measurements are ideal, and we quantify the success of our demonstration by quantum process tomography. We obtain process fidelity >0.65 for a wide variation in strength of the partial collapse from 0−0.94 (where 0 leaves the system unaffected and 1 is the limit of a complete projective measurement). 0.7% topic match

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1.3

2020

[427] High-fidelity mixed species entanglement of trapped ions K. Thirumalai Journal Not Provided 2020 - 6 citations - Show abstract - Cite Abstract: High-Fidelity Mixed Species Entanglement of Trapped Ions Keshav Thirumalai A thesis submitted for the degree of Doctor of Philosophy Michaelmas term 2019 Oriel College, Oxford Harnessing quantum mechanics to solve problems intractable on classical computers is one of the foremost goals of applied physics. Trapped ions make an excellent physical platform for such a quantum computer, as they have demonstrated unparalleled qubit operation fidelities and memory times, but significant challenges remain in scaling up these systems. A promising scalable architecture is a photonically connected network of mixed element trapped ion nodes, each containing a few ions of two species. Poor quality remote entanglement links between nodes can be tolerated, if entanglement between ions in the same node can be achieved with high fidelity. While local gates have been repeatedly demonstrated between ions of the same species, the fidelity of mixed element quantum gates have not previously surpassed the fault tolerant threshold, above which errors can in principle be corrected. In this thesis we demonstrate an entangling operation between 43Ca+, useful for its long lived qubits, and 88Sr+, well suited for remote entanglement, using a novel mechanism requiring only one laser to manipulate both species. This relatively simple scheme, which is independent of either qubit frequency, allows us to achieve Bell state fidelities of F = 99.8(1)%. We assess the operation of the gate further with state and process tomography, which achieve Bell state fidelity F = 98.1% and average gate fidelity F = 99.05(6)% respectively, though they are hampered by experimental drifts during the long data collection. Finally, we use interleaved randomised benchmarking to get the best estimate of our gate errors, finding an average gate fidelity of F = 99.62(3)% for a sequence of 60 interleaved gates. Along with a demonstration of entanglement between two 88Sr+ ions, achieved with fidelity F = 95.9(4)%, this work paves the way towards demonstrating an elementary mixed species quantum network in future experiments. 0.7% topic match

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0.2

2000

[428] Quantum controlled-NOT gate with ‘hot’ trapped ions S. Schneider, ..., and G. Milburn Journal of Modern Optics 2000 - 5 citations - Show abstract - Cite 0.7% topic match

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0.9

2007

[429] Tailoring quantum architectures to implementation style: a quantum computer for mobile and persistent qubits Eric Chi, ..., and M. Martonosi International Symposium on Computer Architecture 2007 - 16 citations - Show abstract - Cite 0.7% topic match

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2.1

2010

[430] Optimum electrode configurations for fast ion separation in microfabricated surface ion traps A. H. Nizamani and Winfried Hensinger Applied Physics B 2010 - 30 citations - Show abstract - Cite - PDF 0.7% topic match

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0.0

2009

[431] Modern applications of trapped ions Martina Knoop, Laurent Hilico and Jürgen Eschner Journal of Physics B: Atomic, Molecular and Optical Physics 2009 - 0 citations - Show abstract - Cite Abstract: Ion traps are fantastic tools to explore the world of electrons, atomic and molecular ions, or charged clusters, in the classical as well as in the quantum regime. Extremely long storage times allow probing even of single particles with very high precision. The mass selectivity of the trapping devices is exploited in many experiments, in particular for mass metrology. An overwhelming part of the experiments and ideas rely on the very high level of parameter control which is offered by the ion trap. Manipulation of individual ions and engineering of well defined quantum states are the fundamental techniques to take the experiments beyond existing frontiers and to unprecedented precision. This special issue presents state-of-the-art theory and experiments in a variety of tutorials, reviews and research papers. More than half of these contributions form a follow-up to the first workshop on Modern Applications of Trapped Ions held in Les Houches, France, in May 2008. A great number of topics is covered in atomic and molecular physics, with ion traps as a common tool. The variety of approaches is meant to make this digest a helpful resource to the whole ion trapping community. Among the contributions, four major – while still overlapping – domains can be identified. Novel ion trap design is the motor of future developments and applications. Spectacular progress has been made in the domain of quantum information processing, such as the realization of planar traps, which opens the way to large-scale quantum computation. In this issue, this enthralling subject is introduced by a tutorial and two review articles, completed by contributions on different experimental realizations. Precision measurements belong to a more traditional domain which nevertheless evolves at the forefront of research: metrology of frequencies and fundamental constants, measurements of g-factors or high-precision mass measurements are the foundations of atomic and molecular physics. The creation and investigation of cold molecular ions and clusters are among the fastest growing topics, leading to ultracold chemistry at the single-particle scale. The next edition of this meeting series will take the name of European Conference on Trapped Ions (ECTI) and will be held in the UK in 2010. We are looking forward to this event, which will offer the possibility to continue the fruitful interaction between research groups that employ ion traps in widely different contexts, and to take the next snapshot of this dynamic research area. 0.7% topic match

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13.3

2005

[432] Surface-electrode architecture for ion-trap quantum information processing J. Chiaverini, ..., and D. Wineland Quantum Inf. Comput. 2005 - 260 citations - Show abstract - Cite - PDF 0.7% topic match

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0.0

2017

[433] Continuous-relief diffractive microlenses for laser beam focusing Aushal, ..., and Inclair Journal Not Provided 2017 - 0 citations - Show abstract - Cite Abstract: Microscale, continuous-profile, diffractive lenses have been fabricated and characterized. Lenses designed to operate at λ0 = 405 nm were created by focused ion beam milling of a glass substrate. The micro-structured profile was analysed by confocal microscopy and optical performance was quantified by measurements of the transmitted laser beam profile. Lenses of size 125 μm × 125 μm, containing up to 18 annuli and focusing at 400 μm, 450 μm and 500 μm have been made. Measured focused beams were in excellent agreement with the predicted performance. A maximum diffraction efficiency of 84 % and side-lobe suppression down to the 10−4 level can be achieved. The suitability of the lenses for interfacing with trapped-ion systems is outlined. © 2017 Optical Society of America OCIS codes: (050.1965) Diffractive lenses; (050.6875) Three-dimensional fabrication; (220.4610) Optical fabrication; (220.4000) Microstructure fabrication. References and links 1. H. Haffner, C. F. Roos, and R. Blatt, “Quantum computing with trapped ions,” Phys. Rep. 469, 155–203 (2008). 2. R. Blatt and D. Wineland, “Entangled states of trapped atomic ions,” Nature 453, 1008–1015 (2008). 3. C. Monroe and J. Kim, “Scaling the ion trap quantum processor,” Science 339, 1164– 1169 (2013). 4. S. Seidelin, J. Chiaverini, R. Reichle, J. Bollinger, D. Leibfried, J. Britton, J. Wesenberg, R. Blakestad, R. Epstein, D. Hume, W. Itano, J. Jost, C. Langer, R. Ozeri, N. Shiga, and D. Wineland, “Microfabricated surface-electrode ion trap for scalable quantum information processing,” Phys. Rev. Lett. 96, 253003 (2006). 5. G. Wilpers, P. See, P. Gill, and A. G. Sinclair, “A monolithic array of three-dimensional ion traps fabricated with conventional semiconductor technology.” Nat. Nanotech. 7, 572–576 (2012). 6. R. C. Sterling, H. Rattanasonti, S. Weidt, K. Lake, P. Srinivasan, S. C. Webster, M. Kraft, and W. K. Hensinger, “Fabrication and operation of a two-dimensional ion-trap lattice on a high-voltage microchip.” Nat. Commun. 5, 3637 (2014). 7. B. Tabakov, F. Benito, M. Blain, C. R. Clark, S. Clark, R. A. Haltli, P. Maunz, J. D. Sterk, C. Tigges, and D. Stick, “Assembling a ring-shaped crystal in a microfabricated surface ion trap,” Phys. Rev. Appl. 4, 031001 (2015). 8. N. D. Guise, S. D. Fallek, K. E. Stevens, K. R. Brown, C. Volin, A. W. Harter, J. M. Amini, R. E. Higashi, S. T. Lu, H. M. Chanhvongsak, T. A. Nguyen, M. S. Marcus, T. R. Ohnstein, and D. W. Youngner, “Ball-grid array architecture for microfabricated ion traps,” J. Appl. Phys. 117, 174901 (2015). 9. D. Kielpinski, C. Volin, E. W. Streed, F. Lenzini, and M. Lobino, “Integrated optics architecture for trapped-ion quantum information processing,” Quantum Inf. Process. 15, 5315–5338 (2016). 10. M. Ke, F. Zhou, X. Li, J. Wang, and M. Zhan, “Tailored-waveguide based photonic chip for manipulating an array of single neutral atoms,” Opt. Express 24, 9157 (2016). 11. C. C. Nshii, M. Vangeleyn, J. P. Cotter, P. F. Griffin, E. A. Hinds, C. N. Ironside, P. See, A. G. Sinclair, E. Riis, and A. S. Arnold, “A surface-patterned chip as a strong source of ultracold atoms for quantum technologies,” Nat. Nanotech. 8, 321–324 (2013). 12. M. Trupke, E. A. Hinds, S. Eriksson, E. A. Curtis, Z. Moktadir, E. Kukharenka, and M. Kraft, “Microfabricated high-finesse optical cavity with open access and small volume,” Appl. Phys. Lett. 87, 211106 (2005). 13. E. R. Dufresne and D. G. Grier, “Optical tweezer arrays and optical substrates created with diffractive optics,” Rev. Sci. Instrum. 69, 1974–1977 (1998). 14. H. Martinsson, J. Bengtsson, M. Ghisoni, and A. Larsson, “Monolithic integration of vertical-cavity surface-emitting laser and diffractive optical element for advanced beam shaping,” IEEE Photon. Technol. Lett. 11, 503–505 (1999). 15. V. Gandhi, J. Orava, H. Tuovinen, T. Saastamoinen, J. Laukkanen, S. Honkanen, and M. Hauta-Kasari, “Diffractive optical elements for optical identification,” Appl. Opt. 54, 1606 (2015). Vol. 25, No. 22 | 30 Oct 2017 | OPTICS EXPRESS 26987 #303223 https://doi.org/10.1364/OE.25.026987 Journal © 2017 Received 27 Jul 2017; revised 22 Sep 2017; accepted 3 Oct 2017; published 20 Oct 2017 16. H. Melkonyan, K. Al Qubaisi, K. Sloyan, A. Khilo, and M. S. Dahlem, “Gradient-index optical fiber lens for efficient fiber-to-chip coupling,” Opt. Express 25, 13035–13045 (2017). 17. E. W. Streed, B. G. Norton, A. Jechow, T. J. Weinhold, and D. Kielpinski, “Imaging of trapped ions with a microfabricated optic for quantum information processing.” Physical review letters 106, 010502 (2011). 18. A. Jechow, E. W. Streed, B. G. Norton, M. J. Petrasiunas, and D. Kielpinski, “Wavelength-scale imaging of trapped ions using a phase Fresnel lens.” Opt. Lett. 36, 1371–1373 (2011). 19. A. McDonald, G. McConnell, D. C. Cox, E. Riis, and P. F. Griffin, “3D mapping of intensity field about the focus of a micrometer-scale parabolic mirror.” Opt. Express 23, 2375–2382 (2015). 20. K. K. Mehta, C. D. Bruzewicz, R. McConnell, R. J. Ram, J. M. Sage, and J. Chiaverini, “Integrated optical addressing of an ion qubit,” Nat. Nanotechol. 11, 1066–1070 (2016). 21. H.-P. Herzig, Micro-Optics: Elements, Systems And Applications (Taylor & Francis, 1997). 22. B. C. Kress and P. Meyrueis, Applied Digital Optics: From Micro-Optics to Nanophotonics (Wiley, 2009). 23. A. Nottola, A. Gerardino, M. Gentili, E. Di Fabrizio, S. Cabrini, P. Melpignano, and G. Rotaris, “Fabrication of semi-continuous profile diffractive optical elements for beam shaping by electron beam lithography,” Microelectron. Eng. 53, 325–328 (2000). 24. W. Däschner, M. Larsson, and S. H. Lee, “Fabrication of monolithic diffractive optical elements by the use of e-beam direct write on an analog resist and a single chemically assisted ion-beam-etching step,” Appl. Opt. 34, 2534 (1995). 25. F. Schiappelli, R. Kumar, M. Prasciolu, D. Cojoc, S. Cabrini, M. De Vittorio, G. Visimberga, A. Gerardino, V. Degiorgio, and E. Di Fabrizio, “Efficient fiber-to-waveguide coupling by a lens on the end of the optical fiber fabricated by focused ion beam milling,” Microelectron. Eng. 73, 397–404 (2004). 26. I. Utke, S. Moshkalev, and P. Russel, Nanofabrication using focused ion and electron beams: principles and applications (Oxford University, 2012). 27. D. A. Pommet, M. G. Moharam, and E. B. Grann, “Limits of scalar diffraction theory for diffractive phase elements,” J. Opt. Soc. Am. A 11, 1827 (1994). 28. T. Shiono, T. Hamamoto, and K. Takahara, “High-efficiency blazed diffractive optical elements for the violet wavelength fabricated by electron-beam lithography,” Appl. Opt. 41, 2390 (2002). 29. M. A. Golub, “Generalized conversion from the phase function to the blazed surface-relief profile of diffractive optical elements,” J. Opt. Soc. Am. A 16, 1194 (1999). 30. G. Whyte and J. Courtial, “Experimental demonstration of holographic three-dimensional light shaping using a Gerchberg-Saxton algorithm,” New J. Phys. 7, 117 (2005). 31. Yongqi Fu, “Integration of microdiffractive lens with continuous relief with vertical-cavity surface-emitting lasers using focused ion beam direct milling,” IEEE Photon. Techol. Lett. 13, 424–426 (2001). 32. Y. Fu and N. K. A. Bryan, “Investigation of physical properties of quartz after focused ion beam bombardment,” Appl. Phys. B 80, 581–585 (2005). 33. S. Reyntjens and R. Puers, “A review of focused ion beam applications in microsystem technology,” J. Micromech. Microeng. 11, 287–300 (2001). 34. S. Juodkazis, L. Rosa, S. Bauerdick, L. Peto, R. El-Ganainy, and S. John, “Sculpturing of photonic crystals by ion beam lithography: towards complete photonic bandgap at visible wavelengths,” Opt. Express 19, 5802 (2011). 35. P. See, G. Wilpers, P. Gill, and A. G. Sinclair, “Fabrication of a monolithic array of three dimensional si-based ion traps,” J. Microelectromech. Syst. 22, 1180–1189 (2013). 36. M. Harlander, M. Brownnutt, W. Hänsel, and R. Blatt, “Trapped-ion probing of light-induced charging effects on dielectrics,” New J. Phys. 12, 93035 (2010). 37. A. M. Eltony, S. X. Wang, G. M. Akselrod, P. F. Herskind, and I. L. Chuang, “Transparent ion trap with integrated photodetector,” Appl. Phys. Lett. 102, 054106 (2013). 38. M. Ghadimi, V. Blūms, B. G. Norton, P. M. Fisher, S. C. Connell, J. M. Amini, C. Volin, H. Hayden, C.-S. Pai, D. Kielpinski et al., “Scalable ion–photon quantum interface based on integrated diffractive mirrors,” Quantum Inf. 3, 4 (2017). 39. D. H. Slichter, V. B. Verma, D. Leibfried, R. P. Mirin, S. W. Nam, and D. J. Wineland, “UV-sensitive superconducting nanowire single photon detectors for integration in an ion trap,” Opt. Express 25, 8705–8720 (2017). 40. A. C. Fischer, F. Forsberg, M. Lapisa, S. J. Bleiker, G. Stemme, N. Roxhed, and F. Niklaus, “Integrating MEMS and ICs,” Microsyst. Nanoeng. 1, 15005 (2015). 41. G. D. Marshall, A. Politi, J. C. F. Matthews, P. Dekker, M. Ams, M. J. Withford, and J. L. O’Brien, “Laser written waveguide photonic quantum circuits,” Opt. Express 17, 12546 (2009). 0.7% topic match

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2020

[434] Vacuum characterization of a compact room-temperature trapped ion system Yuhi Aikyo, ..., and Jungsang Kim arXiv: Atomic Physics 2020 - 6 citations - Show abstract - Cite - PDF 0.7% topic match

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6.5

2013

[435] Two-dimensional lattice of blue-detuned atom traps using a projected Gaussian beam array M. Piotrowicz, ..., and M. Saffman Physical Review A 2013 - 73 citations - Show abstract - Cite - PDF 0.7% topic match

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0.0

2008

[436] Diplomarbeit Local Qubit Control in Circuit Quantum Electrodynamics Presented by : L. Steffen Journal Not Provided 2008 - 0 citations - Show abstract - Cite Abstract: Circuit quantum electrodynamics (QED) [1] is the solid state version of cavity quantum electrodynamics, where the interaction of photons and atoms inside a cavity is studied. But instead of optical cavities and real atoms, a circuit QED system uses a one-dimensional transmission line resonator as a cavity [2] and a Cooper pair box [3] as an artificial atom. These systems are not only intresting because they offer the possibility to perform quantum optic experiments in a solid state system, but also because they are a promising candidate for the implementation of a quantum information processor. In recent realizations of such circuit QED experiments [4, 5], single qubits could be well characterized and controlled. Even the coupling of two qubits via the cavity has been achieved [6]. In a next step towards the implementation of a quantum information processor, one needs to perform experiments with many qubits. For that case, one has to be able to control the parameters of each qubit individually. This means that one should be able to change the state of a qubit without disturbing the other ones and also to tune the transition frequency of each qubit separately. So far, the qubits were driven by microwave signals applied to the resonator. In that case, the control parameters couple to all qubits resulting in a bad selectivity. The qubit transition frequency can be adjusted by a magnetic flux through the loop of the Cooper pair box. This was accomplished by an external coil. To be able to control several qubits independently of each other, one has to use on-chip gatelines for each qubit instead of coupling a bias voltage and RF signal via the resonator or applying a global magnetic field. One of the main goals of this thesis was to design new gate lines for local qubit control and calculate their effects on the decay time. To control the qubit state, lines similar to the ones that couple to the resonator can be used. These lines couple directly and therefore stronger to the Cooper pair boxes. The stroger coupling allows to drive transitions faster than via the resonator but offers also a direct decay channel for the qubit state. The final design of the charge/drive lines was a tradeoff between high control ability and long decay times. The control of the qubit transition frequncy by magnetic flux is more challenging. To generate a flux, one needs a current passing near by the Cooper pair box. But the low mutual inductance of such a line requires high currents to achieve a reasonnable control ability. To prevent the low temperature stages of the cryostat from heating up, a new cabling with low resistance components had to be implemented. This thesis presents the designs of gate lines for local qubit control. To estimate the 0.7% topic match

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2006

[437] Trapping states of a trapped ion, revisited P. Toschek and S. Wallentowitz Acta Physica Hungarica B) Quantum Electronics 2006 - 0 citations - Show abstract - Cite 0.7% topic match

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None

[438] Imaging of trapped ions with a microfab-7 No author found Journal Not Provided None - 0 citations - Show abstract - Cite 0.7% topic match

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2.2

2023

[439] Photonic Quantum Computing Mark Thompson 2023 28th Microoptics Conference (MOC) 2023 - 3 citations - Show abstract - Cite 0.7% topic match

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0.1

2007

[440] Novel photonic bandgap based architectures for quantum computers and networks Durdu Ö. Güney Journal Not Provided 2007 - 1 citations - Show abstract - Cite Abstract: All of the approaches for quantum information processing have their own advantages, but unfortunately also their own drawbacks. Ideally, one would merge the most attractive features of those different approaches in a single technology. We envision that large-scale photonic crystal (PC) integrated circuits and fibers could be the basis for robust and compact quantum circuits and processors of the next generation quantum computers and networking devices. Cavity QED, solid-state, and (non)linear optical models for computing, and optical fiber approach for communications are the most promising candidates to be improved through this novel technology. In our work, we consider both digital and analog quantum computing. In the digital domain, we first perform gate- level analysis. To achieve this task, we solve the Jaynes- Cummings Hamiltonian with time-dependent coupling parameters under the dipole and rotating-wave approximations for a 3D PC single-mode cavity with a sufficiently high Q-factor. We then exploit the results to show how to create a maximally entangled state of two atoms and how to implement several quantum logic gates: a dual-rail Hadamard gate, a dual-rail NOT gate, and a SWAP gate. In all of these operations, we synchronize atoms, as opposed to previous studies with PCs. The method has the potential for extension to N-atom entanglement, universal quantum logic operations, and the implementation of other useful, cavity QED-based quantum information processing tasks. In the next part of the digital domain, we study circuit-level implementations. We design and simulate an integrated teleportation and readout circuit on a single PC chip. The readout part of our device can not only be used on its own but can also be integrated with other compatible optical circuits to achieve atomic state detection. Further improvement of the device in terms of compactness and robustness is possible by integrating with sources and detectors in the optical regime. In the analog domain, we consider a quantum simulation problem. We show that the Klein paradox for the Klein-Gordon equation of a spin-zero particle manifests exactly the same kind of wave propagation and negative refraction phenomenon as the scattering of a transverse-electric-polarized electromagnetic wave incident on a negative index medium. Using this peculiar feature of negative index materials, we show that real time control and processing of some quantum experiments related with Klein paradox can be achieved by an optoelectronic simulator designed according to certain transformations and approximations 0.7% topic match

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2013

[441] Fast, High Fidelity State Detection of a $^{171}$Yb$^{+}$ Ion Using Large Numerical Aperture Optics R. Noek, ..., and Jungsang Kim Bulletin of the American Physical Society 2013 - 0 citations - Show abstract - Cite 0.7% topic match

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0.0

2024

[442] Superconducting NbTi Radiofrequency Resonator for Surface ion Traps M. Schubert, ..., and B. Hampel IEEE Transactions on Applied Superconductivity 2024 - 0 citations - Show abstract - Cite 0.7% topic match

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0.0

2022

[443] N ov 2 00 4 Spin-dependent forces on trapped ions for phase-stable quantum gates and motional Schrödinger-cat states P. Haljan, ..., and C. Monroe Journal Not Provided 2022 - 0 citations - Show abstract - Cite 0.7% topic match

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0.1

2007

[444] Quantum information processing using selectively addressed atoms D. Segal, ..., and D. Meschede Journal of Modern Optics 2007 - 1 citations - Show abstract - Cite Abstract: This special issue of the Journal of Modern Optics draws heavily on the work of a recent European Union Project entitled ‘Quantum Gates and Elementary Scalable Processors Using Deterministically Addressed Atoms’ (QGATES). A more comprehensive overview article (with a more complete list of references) which accompanies the papers published here will appear in a future issue of the Journal of Modern Optics. In that article we will put this work into context with the worldwide state of the art in this important area of Quantum Information Processing (QIP). (See [1] for a readable overview which covers the wider field of QIP in general.) Broadly speaking it is possible to split experimental approaches to QIP into two categories: those based on the methods of atomic physics and atom-optical interfaces and those based on solid state or condensed matter physics. A more complete overview of the field of quantum information processing as a whole can be gained by studying the EU and US roadmaps for QIP [2, 3]. The QGATES project encompassed both theoretical and experimental work in the general areas of trapped neutral atoms, cavity QED and trapped ions. Neutral atoms may be trapped using light and the interference between two or more laser beams can be employed to create 1-, 2and even 3-D arrays of traps into which individual atoms can be loaded (optical lattices). For applications to quantum information processing the vision is of an array with a single atom at each trapping site and the ability to generate entanglement between nearest neighbours in the array. Read-out is then accomplished using the well-known techniques already employed with trapped ions. The ability to load individual atoms into trapping sites is clearly a key requirement and this has been facilitated for individual traps by the discovery of a process dubbed ‘collisional blockade’ [4] and for optical lattices by the demonstration of the Mott insulator transition [5]. Collisional blockade ensures that tight optical traps favour holding either a single atom or no atom at all. If a second atom attempts to join a single atom already located in the trap both atoms are immediately ejected from the trap. The Mott insulator transition is a collective effect which drives a superfluid state in a BoseEinstein condensate into a state in which the atoms arrange themselves with a single atom at each lattice site. Another key step is the ability to generate entanglement between atoms held in dipole traps. One way this can be done is Journal of Modern Optics Vol. 54, No. 11, 20 July 2007, 1537–1540 0.7% topic match

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2016

[445] Towards an integrated ion trap - cavity system with strong coupling for multiple ions J. Morphew Journal Not Provided 2016 - 0 citations - Show abstract - Cite 0.7% topic match

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50.8

2010

[446] Circuit quantum electrodynamics L. Bishop arXiv: Mesoscale and Nanoscale Physics 2010 - 712 citations - Show abstract - Cite - PDF 0.6% topic match

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0.7

2020

[447] Surface-Electrode Ion Trap With Ground Structures for Minimizing the Dielectric Loss in the Si Substrate J. Tao, ..., and C. S. Tan IEEE Transactions on Components, Packaging and Manufacturing Technology 2020 - 3 citations - Show abstract - Cite 0.6% topic match

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1.2

2000

[448] A novel high-performance fourier transform ion cyclotron resonance cell for improved biopolymer characterization. J. Bruce, ..., and R. D. Smith Journal of mass spectrometry : JMS 2000 - 29 citations - Show abstract - Cite 0.6% topic match

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1.3

2015

[449] Fast and efficient transport of large ion clouds M. Kamsap, ..., and M. Knoop Physical Review A 2015 - 12 citations - Show abstract - Cite - PDF 0.6% topic match

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0.0

2018

[450] Developing theoretical and experimental tools for a hybrid quantum simulator based on trapped ions Sainath Motlakunta Journal Not Provided 2018 - 0 citations - Show abstract - Cite Abstract: Quantum simulation is the process of using a highly controllable quantum system to simulate another less controllable system. Quantum simulation can provide insights into the properties and dynamics of complex many-body systems. Trapped ion platform is one of the leading candidates for a quantum simulator due to its properties such as ease of isolation, preparation and manipulation. Simulating high dimensional spin systems enables us to study the various physical phenomena in higher geometries. Previous proposals for simulating higher dimensions require experimental resources that don’t scale favourably with the system size[1]. In this thesis, we propose a hybrid (digital-analog) approach to simulate an effective 2D lattice from a 1D chain of trapped ions. In the initial geometry, the ions interact with each other through a flip-flop kind of interactions generated using a global Mølmer-Sørensen scheme [2, 3]. A series of single qubit gates are used to rescale and suppress the interactions in the initial chain to simulate the target geometry. These gates are applied using a laser field gradient which generates a site-dependent AC stark shift. I discuss the construction of this protocol in detail and the theoretical results for the case of 6, 9 and 16 ions. I also show that the number of gates and also the Stark gradient scale linearly with the system size. Experimental implementation of an ion trap quantum simulator has various challenges, one of the which is the laser frequency stabilization within a fraction of transition linewidth. Traditionally, this is done by locking the lasers to an atomic transition. In this thesis, I discuss two alternative schemes for locking the laser frequencies used to build a 171Yb ion quantum simulator. One of these solutions uses a commercial wavemeter as a measuring device for the frequency and feedbacks the lasers based on this measurement. I discuss the layout of this scheme and some results. Other solution uses a Fabry Perot (FP) cavity to transfer the stability of a stable laser to an unstable laser. In this thesis, I discuss the construction, optical layout and transmission measurements of a home-built FP cavity. 0.6% topic match

0.6%

0.0

2009

[451] TWO-DIMENSIONAL ARRAY OF ION TRAPS ON A PLANAR CHIP J. Wan, ..., and Liang Liu Modern Physics Letters B 2009 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

0.0

2005

[452] Trapping ions in an ion trap prior to mass analysis A. Makarov, ..., and Oliver Lange Journal Not Provided 2005 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

0.9

2014

[453] Two-mode coupling in a single-ion oscillator via parametric resonance D. Gorman, ..., and H. Haffner Physical Review A 2014 - 9 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.0

2006

[454] MEMS-based arrays of micro ion traps for quantum simulation scaling. Dana Joy Berkeland, ..., and B. Jokiel https://doi.org/10.2172/983674 2006 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

0.4

2020

[455] Context-Sensitive and Duration-Aware Qubit Mapping for Various NISQ Devices Yu Zhang, ..., and Quanxi Li ArXiv 2020 - 2 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.7

2015

[456] Fast accumulation of ions in a dual trap M. Kamsap, ..., and M. Knoop Europhysics Letters 2015 - 6 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.0

2004

[457] Building Blocks for a Scalable Quantum Information Processor Based On Trapped Ions D. Leibfried, ..., and D. Wineland https://doi.org/10.1142/9789812703002_0045 2004 - 1 citations - Show abstract - Cite 0.6% topic match

0.6%

0.0

2023

[458] Narrow Linewidth Semiconductor Laser for Ba+ Quantum Applications K. Nechay, ..., and Andreas Schramm 2023 IEEE International Conference on Quantum Computing and Engineering (QCE) 2023 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

0.0

2006

[459] Multipolar trap geometries for particle trapping under standard reference temperature and pressure conditions B. Mihalcea, ..., and Ion M. Mih Journal Not Provided 2006 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

0.3

2007

[460] Efficient quantum logic with cold trapped ions for maximally entangled states S. Fujiwara, ..., and S. Hasegawa Physical Review A 2007 - 6 citations - Show abstract - Cite 0.6% topic match

0.6%

0.6

2015

[461] Freely configurable quantum simulator based on a two-dimensional array of individually trapped ions M. Mielenz, ..., and T. Schaetz arXiv: Quantum Physics 2015 - 5 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.0

2023

[462] Investigations of 2D ion crystals in a hybrid optical cavity trap for quantum information processing Zewen Sun, ..., and R. Islam Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.2

2004

[463] Electrostatic ion beam trap O. Heber, ..., and D. Zajfman IEEE Symposium Conference Record Nuclear Science 2004. 2004 - 3 citations - Show abstract - Cite 0.6% topic match

0.6%

4.9

2018

[464] Transversality and lattice surgery: Exploring realistic routes toward coupled logical qubits with trapped-ion quantum processors Mauricio Gutiérrez, ..., and A. Bermudez Physical Review A 2018 - 32 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.0

2016

[465] Rapid, Site-Selective Loading of a Scalable Array of Trapped Ions C. Bruzewicz, ..., and J. Sage Bulletin of the American Physical Society 2016 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

4.3

2021

[466] 13.4 A 1GS/s 6-to-8b 0.5mW/Qubit Cryo-CMOS SAR ADC for Quantum Computing in 40nm CMOS Gerd Kiene, ..., and F. Sebastiano 2021 IEEE International Solid- State Circuits Conference (ISSCC) 2021 - 15 citations - Show abstract - Cite 0.6% topic match

0.6%

2.8

1997

[467] Quantum gates with hot trapped ions J. F. Poyatos, ..., and Austria Technical Digest. Summaries of Papers Presented at the International Quantum Electronics Conference. Conference Edition. 1998 Technical Digest Series, Vol.7 (IEEE Cat. No.98CH36236) 1997 - 75 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

4.0

2018

[468] Entangling an arbitrary pair of qubits in a long ion crystal Pak Hong Leung and K. Brown Physical Review A 2018 - 24 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

21.2

2005

[469] Linear ion traps in mass spectrometry. D. J. Douglas, ..., and Dunmin Mao Mass spectrometry reviews 2005 - 414 citations - Show abstract - Cite 0.6% topic match

0.6%

0.0

2003

[470] [The NMR implementation of quantum algorithm]. Xuebing Luo Guang pu xue yu guang pu fen xi = Guang pu 2003 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

7.8

2005

[471] Phase Control of Trapped Ion Quantum Gates P. Lee, ..., and C. Monroe Frontiers in Optics 2005 - 149 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.0

2022

[472] Chip integrated photonics for ion based quantum computing Steffen Sauer, ..., and S. Kroker EPJ Web of Conferences 2022 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

6.3

2008

[473] Architectural design for a topological cluster state quantum computer S. Devitt, ..., and K. Nemoto New Journal of Physics 2008 - 101 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.1

2007

[474] Cluster state quantum computation in coupled cavity arrays D. Angelakis and A. Kay arXiv: Quantum Physics 2007 - 2 citations - Show abstract - Cite - PDF 0.6% topic match

0.5%

0.0

2018

[475] The electric potential generated in surface-electrode ion traps : a comparison between an analytical model and finite-element methods I. Rouse Journal Not Provided 2018 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

0.1

2014

[476] Towards microwave based ion trap quantum technology S. Weidt Journal Not Provided 2014 - 1 citations - Show abstract - Cite Abstract: Scalability is a challenging yet key aspect required for large scale quantum computing and simulation using ions trapped in radio-frequency (rf) Paul traps. In this thesis 171Yb+ ions are used to demonstrate a magnetic field insensitive qubit which has a measured coherence time of 1.5 s, making it an ideal candidate to use for storing quantum information. A magnetic field sensitive qubit is also characterised which can be used for the implementation of multi-qubit gates using a potentially very scalable scheme based on microwaves in conjunction with a static magnetic field gradient instead of using lasers. However, the measured coherence time is limited by magnetic field fluctuations and will prohibit high fidelity gate operations from being performed. To address this issue, the preparation of a dressed-state qubit using a microwave based stimulated rapid adiabatic passage (STIRAP) pulse sequence will be presented. This qubit is protected against the noisy environment making it less sensitive to magnetic field fluctuations. The lifetime of this qubit is measured to demonstrate its suitability for storing quantum information. A powerful method for manipulating the dressed-state qubit will be presented and is used to measure a coherence time of the qubit of 500 ms which is two orders of magnitude longer compared to the magnetic field sensitive qubit. It will also be shown that our method allows for the implementation of arbitrary rotations of the dressed-state qubit on the Bloch sphere using only a single rf field. This substantially simplifies the experimental setup for single and multi-qubit gates. Furthermore, this thesis will present a experimental setup capable of successfully operating microfabricated surface ion traps. This setup is then used to operate and characterise the first two-dimensional (2D) lattice of ion traps on a microchip. A unique feature of the microfabrication technique used for this device is the extremely large voltage that can be applied which allows long ion lifetimes along with large secular frequencies to be measured, demonstrating the robustness of this device. Rudimentary shuttling between neighbouring lattice sites will be shown which could be used as part of a efficient scheme to load a large lattice of ions. One of the many applications of a 2D lattice of ions lies in the field of quantum simulations where many-body systems such as quantum magnetism, high temperature superconductivity, the fractional quantum hall effect and synthetic gauge fields can be simulated. It will be shown how making only minor modifications to the microchip the ion-ion separation can be reduced sufficiently to offer an exciting platform for the successful implementation of 2D quantum simulations. A theoretical investigation on the optimal 2D ion trap lattice geometry will also be presented with the aim to maximise the ratio of ion-ion coupling strength to decoherence from motional heating of the ions and to laser induced off-resonant coupling. 0.5% topic match

0.5%

0.0

2023

[477] Quantum Computing: Present and Prospects R. Gil-Merino, ..., and Gabriel Luque Journal Not Provided 2023 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

5.9

1989

[478] New ion trap for frequency standard applications J. Prestage, ..., and L. Maleki Journal of Applied Physics 1989 - 205 citations - Show abstract - Cite 0.5% topic match

0.5%

1.4

2021

[479] Photons and qubits get a better connection A. Kaufman Science 2021 - 4 citations - Show abstract - Cite 0.5% topic match

0.5%

0.2

2010

[480] A fluorescence study of single trapped Ytterbium ions for quantum information applications S. Ejtemaee Journal Not Provided 2010 - 3 citations - Show abstract - Cite 0.5% topic match

0.5%

0.1

2013

[481] Optimization of double-plane surface electrode ion trap lattices F. Krauth Journal Not Provided 2013 - 1 citations - Show abstract - Cite 0.5% topic match

0.5%

0.0

2011

[482] Novel Ion Trap Made Using Lithographically Patterned Plates Ying Peng Journal Not Provided 2011 - 0 citations - Show abstract - Cite Abstract: Novel Ion Traps Made Using Lithographically Patterned Plates Ying Peng Department of Chemistry and Biochemistry Doctor of Philosophy A new approach of making ion trap mass analyzers was developed in which trapping fields are created in the space between two ceramic plates. Based on microfabrication technology, a series of independently-adjustable electrode rings is lithographically patterned on the facing surfaces of each ceramic plate. The trapping field can be modified or fine-tuned simply by changing the RF amplitude applied to each electrode ring. By adjusting the potential function applied to the plates, arbitrary trapping fields can be created using the same set of ceramic plates. Unlike conventional ion traps, the electrodes of planar ion traps have a non-equipotential surface, thus the electric field is independent of electrode geometry and can be optimized electronically. The simple geometry and open structure of planar ion traps address obstacles to miniaturization, such as fabrication tolerances, surface smoothness, electrode alignment, limited access for ionization or ion injection, and small trapping volume, thereby offering a great opportunity for a portable mass spectrometer device. Planar ion traps including the planar quadrupole ion trap and the coaxial ion trap have been designed and tested using this novel method. The planar quadrupole trap has demonstrated a mass range up to 180 Da (Th), with mass resolution typically between 400-700. We have also developed a novel ion trap in which both toroidal and quadrupolar trapping regions are created simultaneously between a set of plates. This ―Coaxial Trap‖ allows trapping and mass analysis of ions in two different regions: ions can be trapped and mass analyzed in either the toroidal or quadrupolar regions, and transferred between these regions. Some simulation work based on the ion motion between two different trapping regions in the coaxial ion trap has been performed. Using a one-dimensional simulation method, ion motion was investigated to transfer ions between these two regions. The effect of the mutipole components in the radial field and axial field, amplitude and frequency of the primary RF and supplementary AC signal were studied to obtain high mass resolution in the axial direction and high transfer efficiency in the radial direction. In all these devices, the independent control of each patterned electrode element allows independent control of higher-order multipole fields. Fields can be optimized and changed electronically instead of physically as is done in conventional traps. 0.5% topic match

0.5%

0.1

2013

[483] Microfabricated two-dimensional (2D) hexagonal lattice trap H. Rattanasonti, ..., and W. Hensinger 2013 IEEE SENSORS 2013 - 1 citations - Show abstract - Cite 0.5% topic match

0.5%

7.0

2002

[484] Scalable quantum computing with Josephson charge qubits. J. You, ..., and F. Nori Physical review letters 2002 - 152 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

2.4

2019

[485] Protocol of a quantum walk in circuit QED Jia-Qi Zhou, ..., and Chuiping Yang Physical Review A 2019 - 13 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

0.0

2011

[486] Micromotion Compensation and Photoionization of Ions in a Linear Trap Y. Xie 谢, ..., and M. Feng 冯 Chinese Physics Letters 2011 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

1.4

2006

[487] Novel designs for Penning ion traps J. Castrejón-Pita, ..., and R. Thompson Journal of Modern Optics 2006 - 25 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

0.0

2021

[488] Very brief on quantum computing with special respect to ion traps technology Svetomir Simonović Advanced Technologies & Materials 2021 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

11.4

2023

[489] Control and Readout of a 13-level Trapped Ion Qudit Pei Jiang Low, ..., and C. Senko Journal Not Provided 2023 - 13 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

0.0

2007

[490] Quantum computation with donor-based qubits in silicon cavities R. L. D. M. Filho, ..., and L. Davidovich https://doi.org/10.1364/ICQI.2007.ITHB3 2007 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

0.0

2016

[491] Mega-earthquakes rupture flat megathrusts Shicheng Xu, ..., and Yi Cui Journal Not Provided 2016 - 0 citations - Show abstract - Cite Abstract: from a cold atom source (such as aMOT), could be used to maintain arrays indefinitely. Atom-by-atom assembly of defect-free arrays forms a scalable platform with unique possibilities. It combines features that are typically associated with ion-trapping experiments, such as single-qubit addressability (32, 33) and fast cycling times, with the flexible optical trapping of neutral atoms in a scalable fashion. Furthermore, in contrast to solid-state platforms, such atomic arrays are highly homogeneous (31) and mostly decoupled from their environment. The homogeneity of our array should also allow for cooling of the atomic motion via simultaneous sideband cooling in all tweezers at once (34, 35). These features provide an excellent starting point for multiqubit experiments, for studies of quantum many-body effects, and for exploring future applications. The required interactions between the atoms can be engineered using several approaches. Even without sideband cooling, exciting the atoms into high-lying Rydberg states would introduce strong dipole interactions that can be used for fast entangling gates (24, 25, 27). The parallelism afforded by our flexible atom rearrangement enables efficient diagnostics of suchRydberg-mediated entanglement. These interactions may also enable approaches to quantum simulations that involve both coherent coupling and engineered dissipation (26, 27), as well as large-scale entangled quantum states for applications in precision measurements (36). An alternative approach to engineering interactions involves the integration of atom arrays with nanophotonic platforms as demonstrated previously (28, 29). These enable photonmediated interactions that can be employed to couple the atoms within a local multiqubit register or for efficient communication between the registers using a modular quantum network architecture (3). Finally, our platform could enable new bottomup approaches to studying quantum many-body physics in Hubbard models (15, 16, 30), where atomic Mott insulators with fixed atom number and complex spin patterns could be directly assembled. This requires atom temperatures close to the ground state, coherent tunneling between the traps, and sizable on-site interactions. With side-band cooling, ground-state fractions in excess of 90% have already been demonstrated (34, 35) and can likely be improved via additional optical trapping along the longitudinal tweezer axes, which would also increase on-site interaction strengths. Coherent tunneling ofRb atomsbetween similarly sized tweezers has been observed before by reducing the tweezer distance (15, 16). The parametric heating, currently limiting the minimal distance between our traps, could be reduced by working with shallower traps, as needed for tunneling, and by employing fewer traps to increase the frequency separation between neighboring traps. Eventually, this approach could be applied to create ultracold quantummatter composed of exotic atomic species or complexmolecules (37, 38) that are difficult to cool evaporatively. REFERENCES AND NOTES 0.5% topic match

0.5%

1.0

2010

[492] Microfabrication techniques for trapped ion quantum information processing J. Britton arXiv: Quantum Physics 2010 - 14 citations - Show abstract - Cite - PDF Abstract: Quantum-mechanical principles can be used to process information. In one approach, linear arrays of trapped, laser cooled ion qubits (two-level quantum systems) are confined in segmented multi-zone electrode structures. Strong Coulomb coupling between ions is the basis for quantum gates mediated by phonon exchange. Applications of Quantum Information Processing (QIP) include solution of problems believed to be intractable on classical computers. The ion trap approach to QIP requires trapping and control of numerous ions in electrode structures with many trapping zones. In support of trapped ion QIP, I investigated microfabrication of structures to trap, transport and couple large numbers of ions. Using 24Mg + I demonstrated loading and transport between zones in microtraps made of boron doped silicon. This thesis describes the fundamentals of ion trapping, the characteristics of silicon-based traps amenable to QIP work and apparatus to trap ions and characterize traps. Microfabrication instructions appropriate for nonexperts are included. A key characteristic of ion traps is the rate at which ion motional modes heat. In my traps upper bounds on heating were determined; however, heating due to externally injected noise could not be completely ruled out. Noise on the RF potential responsible for providing confinement was identified as one source of injected noise. Using the microfabrication technology developed for ion traps, I made a cantilevered micromechanical oscillator and with coworkers demonstrated a method to reduce the kinetic energy of its lowest order mechanical mode via its capacitive coupling to a driven RF resonant circuit. Cooling results from a RF capacitive force, which is phase shifted relative to the cantilever motion. The technique was demonstrated by cooling a 7 kHz fundamental mode from room temperature to 45 K. Ground state cooling of the mechanical modes of motion of harmonically trapped ions is routine; equivalent cooling of a macroscopic harmonic oscillator has not yet been demonstrated. Extension of this method to devices with higher motional frequencies in a cryogenic system, could enable ground state cooling and may prove simpler than related optical experiments. I also discuss an implementation of the semiclassical quantum Fourier transform (QFT) using three beryllium ion qubits. The QFT is a crucial step in a number of quantum algorithms including Shor's algorithm, a quantum approach to integer factorization which is exponentially faster than the fastest known classical factoring algorithm. This demonstration incorporated the key elements of a scalable ion-trap architecture for QIP. 0.5% topic match

0.5%

0.0

1991

[493] Beads on a string: experiments with a linear rf ion trap M. G. Raizen, ..., and D. Wineland Optical Society of America Annual Meeting 1991 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

1.3

2020

[494] Hardware design of a trapped-ion quantum computer for Software-Tailored Architecture for Quantum co-design (STAQ) project Junki Kim, ..., and Jungsang Kim https://doi.org/10.1364/quantum.2020.qm6a.2 2020 - 5 citations - Show abstract - Cite 0.5% topic match

0.5%

0.0

2007

[495] Surface Planar Ion Chip for Linear Radio-Frequency Paul Traps Wan Jin-Yin, ..., and Liu Liang Chinese Physics Letters 2007 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

4.6

2001

[496] Quantum computing with quantum-dot cellular automata G. Tóth and C. Lent Physical Review A 2001 - 107 citations - Show abstract - Cite 0.5% topic match

0.5%

7.6

2016

[497] Compiling quantum algorithms for architectures with multi-qubit gates E. Martinez, ..., and R. Blatt New Journal of Physics 2016 - 65 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

0.8

2010

[498] Scalable Microchip Ion Traps for Quantum Computation S. Schulz Journal Not Provided 2010 - 11 citations - Show abstract - Cite 0.5% topic match

0.4%

2.5

2010

[499] Surface-electrode point Paul trap T. H. Kim, ..., and I. Chuang Physical Review A 2010 - 35 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.0

2021

[500] Linear optical quantum information processing in silicon nanophotonics E. Hach Photonics for Quantum Workshop 2019 2021 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.1

2002

[501] Coulomb Crystals in a Pulse-Excited Linear Paul Trap N. Kjærgaard, ..., and M. Drewsen https://doi.org/10.1063/1.1454278 2002 - 2 citations - Show abstract - Cite 0.4% topic match

0.4%

0.0

2023

[502] Monolithic Ion Trap Integrated with a Micro Optical Cavity for Quantum Networks Shaobo Gao, ..., and Hiroki Takahashi 2023 28th Microoptics Conference (MOC) 2023 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.2

2014

[503] Sideband cooling to the quantum ground state in a Penning trap J. Goodwin https://doi.org/10.25560/27249 2014 - 2 citations - Show abstract - Cite 0.4% topic match

0.4%

8.1

2006

[504] Trapped ion quantum computation with transverse phonon modes. No author found Physical review letters 2006 - 150 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.1

2016

[505] Experiments with Trapped Ions and Ultrafast Laser Pulses Gifford Johnson https://doi.org/10.13016/M2FK1X 2016 - 1 citations - Show abstract - Cite Abstract: Title of dissertation: EXPERIMENTS WITH TRAPPED IONS AND ULTRAFAST LASER PULSES Kale Gifford Johnson Doctor of Philosophy 2016 Dissertation directed by: Professor Christopher R. Monroe Joint Quantum Institute University of Maryland Department of Physics and National Institute of Standards and Technology Since the dawn of quantum information science, laser-cooled trapped atomic ions have been one of the most compelling systems for the physical realization of a quantum computer. By applying qubit state dependent forces to the ions, their collective motional modes can be used as a bus to realize entangling quantum gates. Ultrafast state-dependent kicks [1] can provide a universal set of quantum logic operations, in conjunction with ultrafast single qubit rotations [2], which uses only ultrafast laser pulses. This may present a clearer route to scaling a trapped ion processor [3]. In addition to the role that spin-dependent kicks (SDKs) play in quantum computation, their utility in fundamental quantum mechanics research is also apparent. In this thesis, we present a set of experiments which demonstrate some of the principle properties of SDKs including ion motion independence (we demonstrate single ion thermometry from the ground state to near room temperature and the largest Schrödinger cat state ever created in an oscillator), high speed operations (compared with conventional atom-laser interactions), and multi-qubit entanglement operations with speed that is not fundamentally limited by the trap oscillation frequency. We also present a method to provide higher stability in the radial mode ion oscillation frequencies of a linear radiofrequency (rf) Paul trap–a crucial factor when performing operations on the rf-sensitive modes. Finally, we present the highest atomic position sensitivity measurement of an isolated atom to date of ∼ 0.5 nm Hz−1/2 with a minimum uncertainty of 1.7 nm using a 0.6 numerical aperature (NA) lens system, along with a method to correct aberrations and a direct position measurement of ion micromotion (the inherent oscillations of an ion trapped in an oscillating rf field). This development could be used to directly image atom motion in the quantum regime, along with sensing forces at the yoctonewton (10−24 N) scale for gravity sensing, and 3D imaging of atoms from static to higher frequency motion. These ultrafast atomic qubit manipulation tools demonstrate inherent advantages over conventional techniques, offering a fundamentally distinct regime of control and speed not previously achievable. EXPERIMENTS WITH TRAPPED IONS AND ULTRAFAST LASER PULSES 0.4% topic match

0.4%

0.0

2008

[506] A Hexagonal Lattice Ion Trap for Quantum Simulation of Spin Models Z. Lin, ..., and I. Chuang Bulletin of the American Physical Society 2008 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

24.6

2013

[507] A quantum information processor with trapped ions P. Schindler, ..., and R. Blatt New Journal of Physics 2013 - 269 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.0

2023

[508] Optical engineering for trapped ion quantum computing S. Mouradian https://doi.org/10.1117/12.2671668 2023 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.3

2017

[509] Multi-level photonics for trapped-ion quantum computing D. Kharas, ..., and J. Chiaverini 2017 IEEE Photonics Society Summer Topical Meeting Series (SUM) 2017 - 2 citations - Show abstract - Cite 0.4% topic match

0.4%

2.3

2003

[510] Scalable quantum processor with trapped electrons. G. Ciaramicoli, ..., and P. Tombesi Physical review letters 2003 - 49 citations - Show abstract - Cite 0.4% topic match

0.4%

0.2

2012

[511] A grooved planar ion trap design for scalable quantum information processing Wei-Bang Ji, ..., and Liu Liang Chinese Physics B 2012 - 2 citations - Show abstract - Cite 0.4% topic match

0.4%

None

[512] Optimal control of conveyor-mode spin-qubit shuttling in a Si/SiGe quantum bus in the presence of charged defects Leibniz-Institut im Forschungsverbund, ..., and M. Kantner Journal Not Provided None - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

11.5

2009

[513] Toward scalable ion traps for quantum information processing Jason M. Amini, ..., and D. Wineland New Journal of Physics 2009 - 171 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.4

2013

[514] A Configurable Surface-Electrode Ion Trap Design for Quantum Information Processing Liu Wei, ..., and Wu Wei Chinese Physics Letters 2013 - 4 citations - Show abstract - Cite 0.4% topic match

0.4%

0.3

2002

[515] A tutorial review: Cold trapped ions as quantum information processors Marek Šašura and V. Buzek Journal Not Provided 2002 - 6 citations - Show abstract - Cite 0.4% topic match

0.4%

3.1

2010

[516] Demonstration of a microfabricated surface electrode ion trap D. Stick, ..., and M. Blain arXiv: Instrumentation and Detectors 2010 - 43 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

1.8

2006

[517] Scalable Error Correction in Distributed Ion Trap Computers D. Oi, ..., and L. Hollenberg Physical Review A 2006 - 33 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.0

2008

[518] 04 12 12 2 v 3 1 3 Se p 20 05 Robust Charge-based Qubit Encoding D. Oi, ..., and T. Stace Journal Not Provided 2008 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.4

2012

[519] Development and implementation of an Yb+ ion trap experiment towards coherent manipulation and entanglement J. McLoughlin Journal Not Provided 2012 - 5 citations - Show abstract - Cite Abstract: Trapped ions are currently one of the most promising architectures for realising the quantum information processor. The long lived internal states are ideal for representing qubit states and, through controlled interactions with electromagnetic radiation, ions can be manipulated to execute coherent logic operations. In this thesis an experiment capable of trapping Yb+ ions, including 171Yb+, is presented. Since ion energy can limit the coherence of qubit manipulations, characterisation of an ion trap heating rate is vital. Using a trapped 174Yb+ ion a heating rate consistent with previous measurements of other ion species in similar ion traps is obtained. This result shows abnormal heating of Yb+ does not occur, further solidifying the suitability of this species for quantum information processing. Efficient creation, and cooling of trapped ions requires exact wavelengths for the ionising, cooling and repump transitions. A simple technique to measure the 1S0 ↔ 1P1 transition wavelengths, required for isotope selective photoionisation of neutral Yb, is developed. Using the technique new wavelengths, accurate to 60 MHz, are obtained and differ from previously published results by 660 MHz. Through a simple modification the technique can also predict Doppler shifted transition frequencies, which may be required in non-perpendicular atom-laser interactions. Using trapped ions, the 2S1=2 ↔ 2P1/2 Doppler cooling and 2D3/2 ↔ 2D[3/2]1/2 repump transitions are also measured to a greater accuracy than previously reported. Many experiments require wavelengths which can only be obtained using complex expensive laser systems. To remedy this a simple cost effective laser is developed to enable laser diodes to be operated at sub zero temperatures, extending the range of obtainable wavelengths. Additional diode modulation capabilities allow for the manipulation of atoms and ions with hyperfine structures. The laser is shown to be suitable for manipulating Yb+ ions by cooling a diode from 372 nm to 369 nm and simultaneously generating 2.1 GHz frequency sidebands. Coherent manipulation such as arbitrary qubit rotations, motional coupling and ground state cooling, are required for trapped ion quantum computing. Two photon stimulated Raman transitions are identified as a suitable technique to implement all of these requirements and an investigation into implementing this technique with 171Yb+ is conducted. The possibility of exciting a Raman transition via either a dipole or quadrupole transitions in 171Yb+ is analysed, with dipole transitions preferred because quadrupole transitions are found to be too demanding experimentally. An inexpensive setup, utilising a dipole transition, is designed and tested. Although currently limited the setup shows potential to be an inexpensive, high fidelity method of exciting a Raman transition. 0.4% topic match

0.4%

2.8

2022

[520] Realizing quantum gates with optically-addressable $^{171}$Yb$^{+}$ ion qudits M. A. Aksenov, ..., and N. Kolachevsky https://doi.org/10.1103/PhysRevA.107.052612 2022 - 5 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

12.4

2014

[521] Optimal quantum control of multimode couplings between trapped ion qubits for scalable entanglement. T. Choi, ..., and C. Monroe Physical review letters 2014 - 131 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.0

2005

[522] Development of a multi-segmented linear Paul trap and reduction of ion micromotion towards quantum-state manipulation A. Yamasaki, ..., and S. Urabe International Quantum Electronics Conference, 2005. 2005 - 0 citations - Show abstract - Cite Abstract: A miniaturized five-segmented linear Paul trap has been developed. Excess ion micromotion of laser-cooled calcium ions has been compensated by observing fluorescence spectra with laser beams propagating in three directions. Quantum information processor (QIP) based on trapped ions has been studied in several groups since the Cirac-Zoller proposal. In their proposal, two electronic levels in each ion form a quantum bit (qubit) and motional mode acts as a data bus to transfer information between ions. Calcium ions are considered to be one of the promising candidates for QIP. Figure 1 shows energy levels of interest of Ca + ion. Its long-lived metastable state 3D5/2 is suitable for sideband cooling and implementation of qubits. The wavelengths related to Doppler cooling and detection are accessible with diode lasers. Fig. 1. Schematic diagram of energy levels of Ca. For the purpose of construction of a large scale QIP based on calcium ions, we developed a miniaturized multi-segmented linear Paul trap which allows to shuttle the laser-cooled ions between different segments in the future. To perform quantum-state manipulation, ions must be laser-cooled to the motional ground state. As a first step to achieve the motional ground state, Doppler cooling is typically performed. The Doppler cooling limit of calcium ion is 0.5 mK, however, it is sometimes difficult to achieve the limit due to excess micromotion when stray electric fields exist. Here we report reduction of excess micromotion of ions trapped in the miniaturized linear Paul trap by observing fluorescence spectra with laser beams propagating in three directions. Figure 2 shows a schematic diagram of the five-segmented trap. All of electrodes are made of stainless. The distance between the surfaces of diagonal electrodes is 1.2 mm. The length of segmented electrodes U, S and K, N, H, R are 2.0 mm and 1.8 mm, respectively. The gaps between these electrodes are 0.1 mm. The trap is typically operated by applying rf voltage with the amplitude of 500 V oscillating at 28 MHz to non-segmented electrodes C and E. A helical resonator is used for driving the rf voltages. The electrodes B and D confine the ions axially. The electrodes G and J are used for applying compensation voltages. Applying dc voltages to the segmented electrodes other than B and D can compensate the stray electric field in the x-direction. A 397-nm diode laser beam and a 866-nm diode laser beam are overlapped with dichroic mirrors. Three pairs of the 397-nm and 866-nm laser beams are irradiated to the trapping region from different directions. We call these beams axial, side, and upper as indicated in Fig. 2. Fig. 2. Five-segmented linear Paul trap. Three pairs of lasers are irradiated to the trapping region. Fluorescence from ions is monitored with both a photomultiplier and an image intensifier followed by a CCD camera. Laser cooling was performed by scanning the 397-nm laser frequency from the lower frequency to the resonance. Here we detect the ions S QWAB3-P12 0.4% topic match

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1.8

2018

[523] Method for determination of technical noise contributions to ion motional heating J. Sedlacek, ..., and J. Chiaverini Journal of Applied Physics 2018 - 11 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.8

2008

[524] Precision Spectroscopy and Quantum Information Processing with Trapped Calcium Ions J. Benhelm Journal Not Provided 2008 - 13 citations - Show abstract - Cite Abstract: Over the last decade quantum information processing (QIP) has exploded into a major field of physics, studied both experimentally and theoretically with a universal quantum computer as a long-term vision. Ions stored as strings in linear Paul traps are among the most promising systems for constructing a quantum device harnessing the computing power inherent in the laws of quantum physics. The two most important challenges in trapped ion quantum computing today are to realize and control systems with large numbers of ions, and to improve and integrate the operations which serve as basic building blocks, in particular universal gate operations. Quite surprisingly, even after many years of intense research with different atom species, it is still not evident which ion is best suited for QIP. This thesis describes the construction of a new experiment built to study a promising candidate qubit, namely the calcium isotope 43Ca+. Due to its nuclear spin of I = 7/2, the isotope 43Ca+ exhibits a relatively complicated level structure, compared to other ions used so far for QIP. This work develops various strategies to successfully control such a complex level scheme. Initially we investigated the hyperfine structure of the 4s S1/2 ↔ 3d D5/2 quadrupole transition at a wavelength of 729 nm by laser spectroscopy using a single trapped 43Ca+ ion. We determined the hyperfine structure constants of the metastable level as AD5/2 = −3.893 12(3)MHz and BD5/2 = −4.239(1)MHz. The isotope shift of this transition with respect to 40Ca+ was measured to be ∆ iso /(2π) = 4 134 711 720(390)Hz. Armed with this knowledge, we were able to demonstrate ground-state cooling, robust state initialization and efficient readout of a qubit encoded in the ground-state hyperfine structure of a 43Ca+ ion. A microwave and a Raman light field were used to drive qubit transitions, and the coherence times for both fields were compared. Phase errors due to interferometric instabilities in the Raman field generation were not limiting the experiments on a time scale of at least 100ms. Even in the presence of magnetic field fluctuations we found a quantum information storage time exceeding one second. We implemented a Molmer-Sorensen type gate operation, entangling ions with a fidelity of 99.3(1)%. The gate was performed on a pair of qubits encoded in two trapped 40Ca+ ions using an amplitude-modulated laser beam interacting with both ions at the same time. A robust gate operation, mapping separable states onto maximally entangled states was achieved by adiabatically switching the laser-ion coupling on and off. The performance of a single gate and concatenations of up to 21 gate operations were analyzed. Concerning the fidelity, this result sets a world record for creating two-qubit entanglement on-demand irrespective of the physical realization considered. Zusammenfassung Die Quanteninformationsverarbeitung (QIV) als experimentelles und theoretisches Teilgebiet der Physik mit dem universellen Quantencomputer als Fernziel entwickelte sich innerhalb der letzten Dekade geradezu explosionsartig. Fur die technische Realisierung einer Maschine zur Ausnutzung der den Gesetzen der Quantenmechanik eigenen Rechenkraft gibt es eine Vielzahl an Moglichkeiten. Ionen, die sich in linearen Paul-Fallen wie auf einer Perlenschnur aufreihen, haben sich dabei mittlerweile als sehr vielversprechenden Ansatz etabliert. Die beiden grosten Herausforderungen der Ionenfallen-Experimente zur QIV bestehen gegenwartig in der Skalierung zu einer Vielzahl kontrollierter Quantenbits und in der Verbesserung und Integration der bereits demonstrierten Grundbausteine, insbesondere universeller Gatteroperationen. Uberraschenderweise ist auch nach vielen Jahren intensiver Forschung unklar, welche Ionen-Sorte zu diesem Zweck am besten geeignet ist. Die vorliegende Arbeit beschreibt den Aufbau eines neuen Experiments zur Untersuchung des Calciumisotops 43Ca+ als attraktiven Kandidaten. Aufgrund des Kernspins von I = 7/2 hat das Isotop 43Ca+, verglichen mit Atomsorten, die bisher fur die QIV verwandt wurden, ein komplizierteres Energieniveauschema. Diese Arbeit diskutiert die daraus resultierenden Moglichkeiten und beschreibt deren experimentelle Realisierung, so dass diese Komplexitat erfolgreich genutzt werden kann. Zunachst wurde die Hyperfein-Struktur des 4s S1/2 ↔ 3d D5/2 Quadrupol-Ubergangs bei einer Wellenlange von 729 nm mittels Laserspektroskopie an einem einzelnen 43Ca+Ion untersucht. Die Hyperfein-Konstanten des metastabilen Energieniveaus wurden zu AD5/2 = −3.893 12(3)MHz, BD5/2 = −4.239(1)MHz bestimmt. Als Nebenprodukt ergab sich die Isotopieverschiebung auf diesem Ubergang bezogen auf 40Ca+ zu ∆ iso /(2π) = 4 134 711 720(390)Hz. Mit diesem Wissen gelang es einzelne 43Ca+-Ionen nahe an den Bewegungsgrundzustand einer Mode zu kuhlen, sowie 43Ca+-Hyperfein-Qubits mit hoher Gute zu initialisieren und auszulesen. Die Koharenzzeiten dieses Hyperfein-Qubits wurden mit einem Mikrowellenfeld und einem Raman-Lichtfeld gemessen. Trotz der Anwesenheit magnetischer Storfelder konnte Quanteninformation uber eine Sekunde gespeichert werden. Auserdem ergaben Messungen, dass die interferometrischen Stabilitatsanforderungen der Raman-Lichtfelder, auf einer Zeitskala von 100ms keine Limitierung darstellen. Die Arbeit schliest mit der Beschreibung einer Molmer-Sorensen Gatteroperation, die verschrankte Zustande mit einer Gute von 99.3(1)% erzeugte. Dieser Gattertyp wurde erstmals auf einem optischen Qubit mittels eines amplitudenmodulierten Lasers realisiert, der an zwei 40Ca+-Ionen gleichermasen koppelte. Eine robuste Gatteroperation, die separable in verschrankte Zustande uberfuhrt, wurde durch adiabatisches Anund Ausschalten dieses Lasers erreicht. Zur Bestimmung moglicher Fehlerquellen wurden bis zu 21 aneinandergereihte Gatteroperationen analysiert. Bezuglich der erreichten Gute stellt das Ergebnis die momentan beste deterministische Zwei-Qubit-Verschrankungsoperation aller bekannter Systeme dar. 0.4% topic match

0.4%

5.9

1999

[525] LASER ADDRESSING OF INDIVIDUAL IONS IN A LINEAR ION TRAP H. Nägerl, ..., and R. Blatt Physical Review A 1999 - 149 citations - Show abstract - Cite Abstract: The physics of storage and processing of quantum information has been of rapidly growing interest during the last years. Information processing at the quantum level might have important future applications relevant to quantum computation ~QC!, quantum cryptography, precision spectroscopy, and the study of decoherence @1–4#. A large number of theoretical proposals on QC are based on a scheme where two-level quantum systems carry quantum information. Manipulation of single quantum bits ~qubits! and interaction between qubits is mediated by laser @5,6# or radio frequency @7# radiation. Any arbitrary quantum logical process can be realized with single-qubit and two-qubit operations @8#. For experiments that are aimed to implement quantum information processing several requirements have to be fulfilled: First, the qubits have to be well decoupled from the environment to protect them against decoherence, i.e., loss of the quantum-mechanical information. It is also necessary to manipulate qubits individually to control their quantum state with so-called single qubit rotations. Furthermore, in order to implement logical gates between qubits, some wellcontrolled interaction between them is employed to generate entanglement. Finally, at the end of an information processing run, which in general may consist of many singleand two-bit operations, the quantum state of the qubits must be determined ~i.e., read out! with ideally 100% efficiency to obtain the final result of the QC process. Only very few existing physical systems meet all these requirements simultaneously. Cirac and Zoller were the first to propose the use of trapped ions for QC @9#. The quantum information is encoded into long-lived internal states of the ions, and the conditional dynamics ~i.e., controlled-NOT operations! between qubits are implemented via laser excitation involving the electronic state of two individually addressed ions and the common quantized vibrational modes of the ion string in the trap. In order to generate arbitrary entangled states of many ions or, equivalently, to implement any quantum information process, we emphasize that all proposed schemes strictly require individual manipulations of a single qubit. In a series of experiments on trapped Be ions it has been shown recently that most of the above requirements for a QC process are indeed met by trapped ions, using highly advanced techniques of ion trapping, laser cooling, and laser manipulation of the trapped ions @10#. However, individual addressing, one of the indispensable requirements for QC, 0.4% topic match

0.4%

3.3

2009

[526] Deterministic reordering of 40Ca+ ions in a linear segmented Paul trap F. Splatt, ..., and W. Hänsel New Journal of Physics 2009 - 50 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

None

[527] Quantum Information Processing the Future of Quantum Information Processing in a World Overwhelmed by Increasing Amounts of Data, Finding New Ways No author found Journal Not Provided None - 0 citations - Show abstract - Cite Abstract: to store and process information has become a necessity. Conventional silicon-based electronics has experienced rapid and steady growth, thanks to the progressive miniaturization of its basic component, the transistor, but that trend cannot continue indefi nitely. In conventional devices, information is stored and manipulated in binary form: The elementary components of these devices—the so-called bits—have two states, each of which encodes the binary 0 or 1. To move beyond the binary system, one can exploit the laws of quantum mechanics. A quantum-mechanical object with two energy levels at its disposal can occupy either of those two levels, but also an arbitrary combination (" superposition ") of the two, much like an electron in a two-slit experiment can go through both slits at once. This results in infi nitely many quantum states that a single quantum bit, or " qubit, " can take; together with another strange property of quantum mechanics—entanglement— it allows for a much more powerful information platform than is possible with conventional components. Quantum information processing (QIP) uses qubits as its basic information units. QIP has many facets, from quantum simulation, to cryptography, to quantum computation, which is expected to solve problems more complex than those within the capabilities of conventional computers. To be useful for QIP, a qubit needs to be both isolated from its environment and tightly controllable, which places stringent requirements on its physical realization. But this is only the fi rst step; to build a quantum computer, for example, we must also have a scalable architecture and error correction that can be performed in parallel with computation; in addition, efficient quantum algorithms must exist for solving the problem at hand—a considerable theoretical challenge. A number of qubit types have been proposed and experimentally realized that satisfy at least some of these criteria , and tremendous progress has been made over the past decade in improving the fi gures of merit, such as the coherence time. In this special section, four Reviews look into the future of QIP in some of its most promising physical realizations. On p. 1164, Monroe and Kim discuss the challenges of scaling trapped ion architectures to hundreds and thousands of qubits and beyond. Devoret and Schoelkopf (p. 1169) speculate on the future of super-conducting circuits, whereas Awschalom et al. (p. 1174) focus on the many promising qubit fl avors based on spins in semiconductors. Finally, Stern and Lindner (p. 1179) … 0.4% topic match

0.4%

11.1

2005

[528] T-junction ion trap array for two-dimensional ion shuttling, storage, and manipulation W. Hensinger, ..., and J. Rabchuk Applied Physics Letters 2005 - 210 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.0

2012

[529] Abstract Submitted for the DAMOP11 Meeting of The American Physical Society Collecting light emitted by a single atom into a single optical mode Taehyun Kim, ..., and P. Maunz Journal Not Provided 2012 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.7

2021

[530] Thermally induced entanglement of atomic oscillators. Pradip Laha, ..., and R. Filip Optics express 2021 - 2 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.2

2003

[531] Quantum information processing with Schrodinger cats K. Nemoto, ..., and G. Milburn https://doi.org/10.1117/12.497230 2003 - 4 citations - Show abstract - Cite 0.4% topic match

0.4%

0.4

2017

[532] Silicon microfabricated linear segmented ion traps for quantum technologies K. Choonee, ..., and A. Sinclair 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS) 2017 - 3 citations - Show abstract - Cite 0.4% topic match

0.4%

0.0

2021

[533] Determining the sound wave spectrum of a trapped ion crystal manipulated by optical tweezers R. Schüssler Journal Not Provided 2021 - 0 citations - Show abstract - Cite Abstract: Many phenomena in nature cannot be understood by simulating them using a classical computer. In particular, for quantum effects in which frustration plays a role, these systems can only be simulated by quantum simulators, which, in theory, are able to reduce calculation times to achievable orders of magnitude.[Ber+11] In this research, we use trapped Yb ion crystals as quantum simulators.[Olm+07] In these trapped ion quantum simulators, the interactions between ion qubits are mediated by sound waves, whose quanta are phonons.[Jam97] We aim to control the sound wave spectrum of the trapped ion crystal using optical tweezers.[Esp+21; Teo+21] Here, we investigate theoretically how the sound wave spectrum looks along one axis, given a specific tweezer pattern. For this, we calculate the ion state populations in a trapped ion crystal when it is irradiated by a laser that couples the ground states of the ions to a metastable excited state.[Lei+03] The level diagram including the relevant transitions is shown in figure 1. The 411 nm transition is from the ground state S1/2 to the excited state D5/2. The 369 nm transition is from the ground state to the state P1/2, allowing for fluorescence detection when the ion relaxes from P1/2 to S1/2. The 935 nm and 760 nm transitions are used to return the ion from the unwanted states D3/2 and F7/2, respectively. By state-dependent fluoresence detection, it is possible to measure the excitation probability. We calculate the probability for each ion to be in the excited state as a function of the frequency of the applied laser pulse. The obtained probability spectrum of each ion depends on both the mode amplitudes for each ion and the respective mode frequencies.[Kim+09] Together, the mode amplitudes and frequencies constitute the whole sound wave spectrum. As an example, we used a 12-ion crystal and calculated a clear dependence on the optical tweezers. Further experiments will implement the spectroscopic fluoresence technique in experiment on trapped Yb ion crystals. Likely experimental limitations include finite laser linewidth, the AC Stark shifts and the Fourier limit as discussed in the outlook. A quantum simulator has qubits, particles with a spin-up and a spin-down state, which interact with each other. In Yb, the S1/2 ground state and the D5/2 metastable excited state are pseudospin states of the ions. The ions can engage in spin-spin interactions, which are generated by sound waves 0.4% topic match

0.4%

0.0

2012

[534] MASTER’S THESIS Iñigo Lara Izcue and A. Sørensen Journal Not Provided 2012 - 0 citations - Show abstract - Cite Abstract: For the last 40 years, the field of quantum technolgies has expanded and incorporated fascinating approaches to overcome the difficulties regarding the operation and scalability of quantum operations. Among this ideas is Measurement-Based Quantum Computing, an alternative point of view in which a highly entangled ressource state is grown at first, and the quantum computation is simulated by disentangling such state through single-qubit measurements. This approach suites perfectly optical systems, as these can provide thousands of entangled qubits encoded in photons. However, among the challenges, it is the initial creation of such highly-entangled ressource in a scalable way. In this thesis a theoretical overview of the different ingredients to implement Measurement-based Quantum Computing is presented: small entangled states such as GHZ states and linear clusters are created on-demand in a time-bin encoding using the spin dynamics and optical transitions of a solid state Quantum Dot (QD), that shall be called the photonic machine gun. These small entangled states, with less than tens of qubits, can then be entangled together probabilistically using fusion gates, that can be implemented with integrated linear-optics circuits. Under certain circumstances, it is possible that these probabilistic operations yield an scalable highly-entangled state through a percolation process. This thesis studies and analyses entanglement percolation over a cubic lattice. It is determined that the protocol proposed can tolerate up to 10% photon loss, is ballistic an heralded. Furthermore, an improved version of a fusion gate called Dynamic Type-II which can be boosted to, e.g. 75% success while having a photons loss toleration of 5%. The protocol for percolation-based quantum computing analyzed generates a graph state over the spin QD quits, which means that the grown entangled state is stored in the solid-state QDs until the measurement-based computation is ready to start, therefore avoiding the need for quantum memories. Finally, it is shown a blueprint of a percolation-based quantum computer that puts together the different blocks discussed through the thesis. In short, this thesis serves as a natural path towards implementing Fusion-Based Quantum Computing with the photonic machine gun system. 0.4% topic match

0.3%

0.0

2006

[535] A scheme for conditional quantum phase gate via bimodal cavity and a Λ-type three-level atom∗ Jian-Wu Cai and Mao-Fa Fang Journal Not Provided 2006 - 0 citations - Show abstract - Cite Abstract: Since Shor proved that a quantum computer (QC) has the unique features of working more efficiently than a classical one, and Cirac and Zoller proposed a scheme to perform quantum computation with trapped cold ions, much attention has been attracted to the field of quantum computation. Through the last decade, a lot of other schemes have been proposed to realize quantum computer, such as quantum computer using trapped cold ions or hot ions, superconducting quantum interference devices (SQUIDs), quantum dots, linear optical devices, NMR system, and cavity quantum electro-magnetic dynamics(CQED). etc. The task of looking for a system to realize a quantum computer is far from ending. The task of designing a QC is equivalent to finding a physical implementation of quantum logic gate between qubits, where a qubit refers to a two-state system |0〉, |1〉. It is well known that any unitary quantum operation can be decomposed into a single qubit rotation and CNOT gate operations between two qubits; while a CNOT gate operation can also be decomposed into single qubit rotations and a conditional phase gate operation between two qubits. A conditional two qubit phase gate operation is defined by U :|a, b〉 → (−1)ab|a, b〉, with a, b = 0, 1, so the task of quantum engineering reduces to designing a two-qubit conditional phase gate. Among the CQED schemes, there are three kinds of methods to encode quantum information. The first one uses two atoms and a cavity mode or two cavity modes, usually assisted by two classical fields, in which quantum information is encoded on the atomic states. The second one employs a bimodal cavity and only one atom, where information is encoded on both of the atomic states and the Fock states of one of the bimodal cavity modes, where the classical field is not necessary. The last one also utilizes two cavity modes and one atom, but quantum information is encoded on both of the Fock states of the two cavity modes. In the last one, a ladder-type or Vtype atom has been used to entangle two qubits, but the scheme using a Λ-type atom to entangle those two qubits has not been reported yet. 0.3% topic match

0.3%

0.3

2012

[536] Yb ion trap experimental set-up and two-dimensional ion trap surface array design towards analogue quantum simulations J. Siverns Journal Not Provided 2012 - 3 citations - Show abstract - Cite Abstract: Ions trapped in Paul traps provide a system which has been shown to exhibit most of the properties required to implement quantum information processing. In particular, a two-dimensional array of ions has been shown to be a candidate for the implementation of quantum simulations. Microfabricated surface geometries provide a widely used technology with which to create structures capable of trapping the required two-dimensional array of ions. To provide a system which can utilise the properties of trapped ions a greater understanding of the surface geometries which can trap ions in two-dimensional arrays would be advantageous, and allow quantum simulators to be fabricated and tested. In this thesis I will present the design, set-up and implementation of an experimental apparatus which can be used to trap ions in a variety of different traps. Particular focus will be put on the ability to apply radio-frequency voltages to these traps via helical resonators with high quality factors. A detailed design guide will be presented for the construction and operation of such a device at a desired resonant frequency whilst maximising the quality factor for a set of experimental constraints. Devices of this nature will provide greater filtering of noise on the rf voltages used to create the electric field which traps the ions which could lead to reduced heating in trapped ions. The ability to apply higher voltages with these devices could also provide deeper traps, longer ion lifetimes and more efficient cooling of trapped ions. In order to efficiently cool trapped ions certain transitions must be known to a required accuracy. In this thesis the 2S1/2 → 2P1/2 Doppler cooling and 2D3/2 → 2D[3/2]1/2 repumping transition wavelengths are presented with a greater accuracy then previous work. These transitions are given for the 170, 171, 172, 174 and 176 isotopes of Yb+. Two-dimensional arrays of ions trapped above a microfabricated surface geometry provide a technology which could enable quantum simulations to be performed allowing solutions to problems currently unobtainable with classical simulation. However, the spin-spin interactions used in the simulations between neighbouring ions are required to occur on a faster time-scale than any decoherence in the system. The time-scales of both the ion-ion interactions and decoherence are determined by the properties of the electric field formed by the surface geometry. This thesis will show how geometry variables can be used to optimise the ratio between the decoherence time and the interaction time whilst simultaneously maximising the homogeneity of the array properties. In particular, it will be shown how the edges of the geometry can be varied to provide the maximum homogeneity in the array and how the radii and separation of polygons comprising the surface geometry vary as a function of array size for optimised arrays. Estimates of the power dissipation in these geometries will be given based on a simple microfabrication. 0.3% topic match

0.3%

0.5

1998

[537] Method of quantum computation with ``hot'' trapped ions S. Schneider, ..., and G. Milburn arXiv: Quantum Physics 1998 - 14 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2011

[538] Micrometer Positioning of a Trapped Ion in the Mode of an Integrated Optical Fiber T. H. Kim, ..., and I. Chuang Journal Not Provided 2011 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

4.5

2014

[539] Cryogenic surface ion trap based on intrinsic silicon M. Niedermayr, ..., and R. Blatt New Journal of Physics 2014 - 44 citations - Show abstract - Cite 0.3% topic match

0.3%

0.0

2020

[540] Two-dimensional linear trap array for quantum information processing P. Holz, ..., and R. Blatt Journal Not Provided 2020 - 0 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2012

[541] A grooved planar ion trap design for scalable quantum information processing W. Ji 冀, ..., and L. Liu 刘 Chinese Physics B 2012 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

1.5

1991

[542] Dynamics of charged particles in a Paul radio-frequency quadrupole trap. Prestage, ..., and Harabetian Physical review letters 1991 - 50 citations - Show abstract - Cite 0.3% topic match

0.3%

0.0

2006

[543] Ion traps and cold atoms for quantum computers I. Cirac Bulletin of the American Physical Society 2006 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

1.1

2022

[544] Efficient Data Encoding and Decoding for Quantum Computing Naveed Mahmud, ..., and E. El-Araby 2022 IEEE International Conference on Quantum Computing and Engineering (QCE) 2022 - 2 citations - Show abstract - Cite 0.3% topic match

0.3%

2.0

2020

[545] Integrated optical control and enhanced coherence of ion qubits via multi-wavelength photonics R. Niffenegger, ..., and J. Chiaverini arXiv: Quantum Physics 2020 - 9 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2006

[546] Cluster States from Quantum Logic Gates with Trapped Ions in Thermal Motion Yang Wen-Xing, ..., and Li Jia-Hua Chinese Physics Letters 2006 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

0.2

2014

[547] Individual addressing of trapped 171 Yb + ion qubits using a MEMS-based beam steering system S. Crain, ..., and J. Kim arXiv: Quantum Physics 2014 - 2 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2024

[548] An architecture for two-qubit encoding in neutral ytterbium-171 atoms Zhubing Jia, ..., and J. Covey Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 0.3% topic match

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19.0

2012

[549] Experimental quantum simulations of many-body physics with trapped ions Christian Schneider, ..., and T. Schaetz Reports on Progress in Physics 2012 - 238 citations - Show abstract - Cite 0.3% topic match

0.3%

0.1

2008

[550] QUANTUM COMPUTATION WITH TRAPPED IONS H. Häffner, ..., and R. Blatt https://doi.org/10.1142/9789812814623_0064 2008 - 2 citations - Show abstract - Cite 0.3% topic match

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0.0

2005

[551] A Simulation of Some Parameters for Linear Paul Trap to Optimize Quantum Computer Operation Kasim M. Al-hity Journal Not Provided 2005 - 0 citations - Show abstract - Cite 0.3% topic match

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55.1

2021

[552] A universal qudit quantum processor with trapped ions M. Ringbauer, ..., and T. Monz Nature Physics 2021 - 158 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.2

2018

[553] Scalable Ion Trap Architecture for Universal Quantum Computation by Collisions P. Liang and Lingzhen Guo arXiv: Quantum Physics 2018 - 1 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2015

[554] Monolithic optical integration for scalable trapped-ion quantum information processing B. G. Norton, ..., and D. Kielpinski 2015 11th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR) 2015 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

8.1

2023

[555] Controlling Two-Dimensional Coulomb Crystals of More Than 100 Ions in a Monolithic Radio-Frequency Trap D. Kiesenhofer, ..., and Christian Roos PRX Quantum 2023 - 12 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2007

[556] Individual Addressing with Trapped Yb+ Ions M. Johanning, ..., and W. Neuhauser 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference 2007 - 0 citations - Show abstract - Cite 0.3% topic match

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0.1

2001

[557] QUANTUM CONTROL AND ENTANGLEMENT ENGINEERING WITH COLD TRAPPED ATOMS P. Jessen and D. L. Haycock Journal Not Provided 2001 - 2 citations - Show abstract - Cite 0.3% topic match

0.3%

2.6

2011

[558] Rydberg excitation of trapped cold ions: a detailed case study Ferdinand Schmidt-Kaler, ..., and Igor Lesanovsky New Journal of Physics 2011 - 35 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2013

[559] A Configurable Surface-Electrode Ion Trap Design for Quantum Information Processing W. Liu 刘, ..., and W. Wu 吴 Chinese Physics Letters 2013 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

0.2

2020

[560] Quantum information processing with mixed-species ion crystals M. Marinelli https://doi.org/10.3929/ETHZ-B-000420229 2020 - 1 citations - Show abstract - Cite Abstract: Trapped ions are among the leading platforms for the realization of scalable quantum information processing (QIP). A hybrid system composed of different species of ions extends the control capabilities of the system by providing new capabilities and extra degrees of freedom. A significant advantage of using two species of ion is the ability to individually manipulate and read out the state of one ion species without disturbing the quantum information stored in the internal states of the other. In this thesis I demonstrate different elements required for the control of mixedspecies ion chains composed of calcium and beryllium ions. One of the main results is the first realization of repeated measurements of quantum correlations of two beryllium ions that preserve their quantum entanglement. This is possible by reading out a cotrapped calcium ion that has previously interacted with the beryllium ions. Real-time feedback of the classical control system allows us to prepare and retain entangled states for up to fifty measurement rounds. The measurements consist of a series of quantum gates between the three ions, which involve mixed-species gates between beryllium hyperfine states and calcium electronic states. Independent experiments, also described in this thesis, show mixed-species entangled state fidelities of 98.4(9)% for two ions, and 93.8(5)% for three ions. The low-crosstalk mixed-species operations demonstrated in this work can be useful in quantum error correction as well as quantum metrology. The abilities of the classical control system and the precise control of mixed-species chains are further exploited to deterministically realize an arbitrary unitary operation on a single ion two-level system (qubit) using measurement-base quantum computing (MBQC). Within this framework, sequences of adaptive measurements on entangled states in a larger multi-qubit Hilbert space are used to realize quantum operations on the two-dimensional space of a single target qubit. As opposed to standard MBQC, entanglement is created on demand when needed in this thesis to minimize the additional resources required to control the target qubit. The work presented in this thesis provides the first not post-selected realization of single-qubit unitaries in the MBQC paradigm. Future algorithms will involve the manipulation of multiple ion chains of different types whose structure is continuously reconfigured through transport and splitting/recombination. This thesis also discusses the characterization of transport and separation of single and mixed-species ion chains. It shows the reliable splitting of single-species chains composed of two ions with a residual motional excitation below 1.6 quanta for calcium and below 0.7 quanta for beryllium. Mixed-species transport and splitting are also investigated. However, more characterization is required to make these processes reliable. Finally, this thesis also describes technical advancements in the software interface used for controlling and calibrating experiments. The interface consists of a low-level structure written in C++ that controls all the physical details of the apparatus, and provides a set of command structures that are independent of details of the physical setup and allow the users to write control scripts at a high level of abstraction. These tools are complemented by an improved graphical user interface that provides users with a significant degree of automation and sophisticated scheduling of calibration experiments through a Python-based scripting interface. This is the second edition of the thesis, released on the 22th of May 2020. The first edition was released on the 25th of March 2020. 0.3% topic match

0.3%

0.2

2008

[561] Planar ion chip design for scalable quantum information processing Jin-Yin Wan, ..., and Liu Liang Chinese Physics B 2008 - 3 citations - Show abstract - Cite 0.3% topic match

0.3%

1.3

2006

[562] Scalable quantum computation in decoherence-free subspaces with trapped ions Li-Xiang Cen, ..., and S. J. Wang Physical Review A 2006 - 23 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2016

[563] Time- and frequency-resolved quantum optics for large-scale quantum computing O. Pfister Spie Newsroom 2016 - 0 citations - Show abstract - Cite Abstract: Quantum computing has the promise of exponentially faster speeds than classical computing methods for specific, but important, calculations. Such problems include Shor’s factoring algorithm (which pertains to data encryption)1 and the simulation of quantum physics.2 Quicker computing for the latter would vastly expand the horizons of quantum physics and quantum chemistry by addressing currently intractable issues (e.g., the potential discovery of room-temperature superconductors, optimization of nitrogen fixation for high-yield fertilizer production, or finding an efficient carbon sequestration process).3 To build a practical quantum computer and achieve such revolutionary objectives, however, the challenges of quantum-bit (‘qubit’) scalability and coherence must be faced. Addressing these challenges has turned the quest for a practical quantum computer into an interdisciplinary endeavor that comprises widely different physical platforms for qubits. Such platforms include trapped ions, optical crystals of atoms, semiconducting quantum dots, superconducting quantum circuits, photonic qubits—and most recently—quantum fields.4 Entanglement (specific quantum correlations) is a crucial property of a quantum processor because the computationally universal set of quantum logic gates must always include an entangling gate. In the circuit model of quantum computing, qubits are initialized independently. The quantum logic gates are subsequently applied to run the algorithm before the result is revealed by measurements on the qubits.5 However, another approach is also possible, in which all the required entanglement is integrated at the start in a generic ‘quantum computing substrate’ (also known as a cluster state).6 A cluster state is defined by a precise entanglement network between qubits, or quantum graph. Once this cluster state has been produced in the laboratory, ‘one-way’ quantum computing7, 8 can then proceed solely via single-qubit measurements of individual qubits—or qumodes (quantum optical fields defined by the resonant modes of a single laser cavity)—and can feedforward to their graph neighbors. These previous studies have all been conducted within the frequency9, 10 and time11 domains and have yielded linear, unidimensional cluster graphs. Universal one-way quantum computing requires a two-dimensional cluster graph, such as a square lattice.7 A scalable version of a square-lattice cluster state, however, has not yet been created in the laboratory (for qubits or qumodes). In our experimental quantum optics group at the University of Virginia, we have been working as part of a collaboration with the quantum theory group at the Royal Melbourne Institute of Technology, Australia, led by Nicolas Menicucci (formerly at the University of Sydney, Australia). We demonstrated the feasibility and the potential of a new approach to making a quantum computer. In our approach, we replace the qubits with qumodes. Our method is advantageous because the number of qumodes can be extremely large. This is the case, for instance, in hundred– thousand mode, octave-spanning optical frequency combs of carrier-envelope phase-locked classical femtosecond lasers.12, 13 In our approach, we use an optical parametric oscillator (OPO) rather than a laser. The cavity of an OPO contains a secondorder nonlinear medium (instead of a one-photon-emitting laser gain medium) in which photons are created in pairs from the annihilation of pump photons. This photon pair emission, into two distinct OPO qumodes, produces entanglement between the qumode optical fields. In our group, we used carefully designed periodically poled potassium titanyl phosphate crystals as well as exquisitely controlled interference between the OPO qumodes of the same frequency and orthogonal polarizations to create prototype quantum processors in the laboratory. These processors have a confirmed—record—size of 60 qumodes entangled 0.3% topic match

0.3%

2.0

2015

[564] Universal control of ion qubits in a scalable microfabricated planar trap C D Herold, ..., and J. Amini New Journal of Physics 2015 - 18 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.1

1999

[565] Quantum Logic Using Sympathetically Cooled Ions D. Kielpinski, ..., and W. Zurek arXiv: Quantum Physics 1999 - 2 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.1

1997

[566] Experimental Creation and Measurement of Motional Quantum States of a Trapped Ion D. Meekhof, ..., and D. Wineland Journal Not Provided 1997 - 3 citations - Show abstract - Cite 0.3% topic match

0.2%

21.6

2006

[567] Microfabricated surface-electrode ion trap for scalable quantum information processing. S. Seidelin, ..., and D. Wineland Physical review letters 2006 - 399 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.0

2013

[568] Trapping and cooling of 174Yb+ ions in a microfabricated surface trap R. Noek, ..., and Jungsang Kim Journal of the Korean Physical Society 2013 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.4

2003

[569] Fast and robust two-qubit gates for scalable ion trap quantum computing J. García-Ripoll, ..., and J. Cirac https://doi.org/10.1103/PhysRevLett.91.157901 2003 - 9 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

6.2

2021

[570] Survey on Quantum Circuit Compilation for Noisy Intermediate-Scale Quantum Computers: Artificial Intelligence to Heuristics Janusz Kusyk, ..., and M. U. Uyar IEEE Transactions on Quantum Engineering 2021 - 22 citations - Show abstract - Cite 0.2% topic match

0.2%

0.9

2019

[571] Encoding a qubit in the motion of a trapped ion using superpositions of displaced squeezed states Christa Flühmann https://doi.org/10.3929/ETHZ-B-000355836 2019 - 5 citations - Show abstract - Cite Abstract: Trapped-ions form a promising platform to realize a future large scale quantum computing device. Qubits are typically stored in internal electronic states, which are coupled using their joint motion in the trap potential. In this thesis this control paradigm is reversed. The harmonic motion of a trapped 40Ca ion forms the main subject of studies, which is controlled via the internal electronic states. A number of new techniques are introduced and examined, primarily based on the implementation of modular variable measurements. These are realized combining an internal state dependent optical dipole force with readout of the internal states. Modular measurements are used to investigate large Schrödinger cat states of the ion's motion, to violate Leggett-Garg tests of macroscopic realism, and nally to realize a logical qubit encoded in an error-correcting code based on the trapped-ion oscillator. The latter o ers an alternative to the standard qubit based quantum information processing approach, which when embedded in systems of coupled oscillators could lead to a large-scale quantum computer. Measurements of a particle's modular position and momentum have been the focus of various discussions of foundational quantum mechanics. Such modular measurements of the trapped-ion's motion are studied in depth in this thesis, in particular their ability to commute, which forms a key element for the latter work on error-correcting codes. Here we make use of the ability to investigate sequences of measurements on a single harmonic oscillator, and study correlations between their results, as well as quantum measurement disturbances between the measurements. In order to achieve the major results of the thesis, it was necessary to characterize and control multiple wave packets in phase space. On the characterization side, the need to cope with states with high energy occupations led to the development of multiple new methods for quantum state tomography, including the use of a squeezed eigenstate basis, and the direct extraction of the characteristic function of the oscillator using state-dependent forces. These were used to analyze some of the largest oscillator Schrödinger cat states which have been produced to date. The main result of this thesis is encoding and full control of a logical qubit in the motional oscillator space using a code proposed 18 years ago by Gottesman, Kitaev and Preskill. Logical code states are realized and manipulated using sequences of up to ve modular measurements applied to an ion initially prepared in a squeezed motional state. Such sequences realize superpositions of multiple squeezed wave packets, which form the code words. The usage of the oscillator enables to encode and in principle correct a logical qubit within a single trapped ion, which when compared to typical qubit-array based approaches simpli es control and hardware. While the discussion above focuses on the new physics in this thesis, in addition the work required technical upgrades to the system, improving control of both qubit and oscillator. These form important components which have impact on all experiments in our setup, beyond the bounds of the current thesis. 0.2% topic match

0.2%

0.0

2017

[572] Large-scale frequency- and time-domain quantum entanglement over the optical frequency comb (Conference Presentation) O. Pfister https://doi.org/10.1117/12.2264549 2017 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.5

2018

[573] Quantum simulation with ions in micro-fabricated Penning traps Shreyansh Jain, ..., and J. Home arXiv: Quantum Physics 2018 - 3 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.0

2014

[574] Scalable Quantum Information Processing with Trapped Ions Jungsang Kim, ..., and P. Maunz https://doi.org/10.1364/QIM.2014.QW4B.3 2014 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2016

[575] Quantum Graph Analysis P. Maunz, ..., and C. Ryan-Anderson https://doi.org/10.2172/1235806 2016 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.9

2018

[576] Deterministic generation of hybrid high- N NOON states with Rydberg atoms trapped in microwave cavities Naeimeh Mohseni, ..., and C. Navarrete-Benlloch Physical Review A 2018 - 5 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.0

2021

[577] Two-qubit gates in a trapped-ion quantum computer by engineering motional modes Ming Li, ..., and Y. Nam ArXiv 2021 - 0 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

5.7

2022

[578] High-Fidelity Ion State Detection Using Trap-Integrated Avalanche Photodiodes. D. Reens, ..., and R. McConnell Physical review letters 2022 - 14 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

4.4

2021

[579] Trapped-Ion Quantum Computer with Robust Entangling Gates and Quantum Coherent Feedback T. Manovitz, ..., and R. Ozeri PRX Quantum 2021 - 12 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.0

2017

[580] Solid-State Integrated Optics for Large-Scale Trapped-Ion Quantum Information Processing K. Mehta, ..., and J. Chiaverini https://doi.org/10.1364/QIM.2017.QW6A.4 2017 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

4.3

2014

[581] Experimental realization of fast ion separation in segmented Paul traps T. Ruster, ..., and U. Poschinger Physical Review A 2014 - 44 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

2.8

2007

[582] Transport quantum logic gates for trapped ions D. Leibfried, ..., and D. Wineland Physical Review A 2007 - 47 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.5

2012

[583] Viewpoint: Moving Traps Offer Fast Delivery of Cold Ions C. Roos Physics 2012 - 6 citations - Show abstract - Cite 0.2% topic match

0.2%

1.9

2023

[584] Fast design and scaling of multi-qubit gates in large-scale trapped-ion quantum computers Yotam Shapira, ..., and R. Ozeri Journal Not Provided 2023 - 2 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.0

2006

[585] Semiconductor Traps for Laser-Cooled Atomic Ions and Scalable Quantum D. Stick, ..., and C. Monroe Journal Not Provided 2006 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.1

2006

[586] Trapped Atomic Ions and Quantum Information Processing D. Wineland, ..., and J. Wesenberg https://doi.org/10.1063/1.2400639 2006 - 2 citations - Show abstract - Cite 0.2% topic match

0.2%

1.4

2023

[587] Universal quantum computing with qubits embedded in trapped-ion qudits Anastasiia S. Nikolaeva, ..., and A. Fedorov Physical Review A 2023 - 2 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.0

1991

[588] Ion Trap. Recent Experiments. Makoto Sakuai, ..., and S. Ohtani https://doi.org/10.1585/jspf1958.66.224 1991 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

18.1

2000

[589] A scalable quantum computer with ions in an array of microtraps J. Cirac and P. Zoller Nature 2000 - 440 citations - Show abstract - Cite 0.2% topic match

0.2%

0.8

2009

[590] Design and characterization of a planar trap U. Tanaka, ..., and S. Urabe Journal of Physics B: Atomic, Molecular and Optical Physics 2009 - 12 citations - Show abstract - Cite 0.2% topic match

0.2%

0.7

2007

[591] High-fidelity ion-trap quantum computing with hyperfine clock states L. Aolita, ..., and Hartmut Häffner Physical Review A 2007 - 12 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

6.3

2011

[592] Quantum information processing and metrology with trapped ions D. Wineland and D. Leibfried Laser Physics Letters 2011 - 84 citations - Show abstract - Cite 0.2% topic match

0.2%

0.2

2015

[593] Using an ion trap with two temperature reservoirs to explore nonequilibrium physics Christian Vaca, ..., and A. Levine arXiv: Statistical Mechanics 2015 - 2 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.0

2021

[594] 0 O ct 2 01 2 Ion-laser interactions : The most complete solution H. Moya-Cessa, ..., and J. M. Vargas-Martínez Journal Not Provided 2021 - 0 citations - Show abstract - Cite Abstract: Trapped ions are considered one of the best candidates to perform quantum information processing. By interacting them with laser beams they are, somehow, easy to manipulate, which makes them an excellent choice for the production of nonclassical states of their vibrational motion, the reconstruction of quasiprobability distribution functions, the production of quantum gates, etc. However, most of these effects have been produced in the so-called low intensity regime, this is, when the Rabi frequency (laser intensity) is much smaller than the trap frequency. Because of the possibility to produce faster quantum gates in other regimes it is of importance to study this system in a more complete manner, which is the motivation for this contribution. We start by studying the way ions are trapped in Paul traps in and review the basic mechanisms of trapping. Then we show how the problem may be completely solved for trapping states; i.e., we find (exact) eigenstates of the full Hamiltonian. We show how in the low intensity regime Jaynes-Cummings and anti-Jaynes-Cummings interactions may be obtained, without using the rotating wave approximation and analyze the medium and high intensity regimes were dispersive Hamiltonians are produced. The traditional approach (low intensity regime) is also studied and used for the generation of non-classical states of the vibrational of the vibrational wavefunction. In particular, we show how to add and subtract vibrational quanta to an initial state, how to produce specific superpositions of number states and how to generate NOON states for the two-dimensional vibration of the ion. It is also shown how squeezing may be measured. The time dependent problem is studied by using Lewis-Ermakov methods, we give a solution to the problem when the time dependence of the trap is considered and also analyze an specific (artificial) time dependence that produces squeezing of the initial vibrational wave function. A way to mimic the ion-laser interaction via classical optics is also introduced. 0.2% topic match

0.2%

0.6

2016

[595] A high-fidelity microwave driven two-qubit quantum logic gate in 43Ca+ M. Sepiol Journal Not Provided 2016 - 5 citations - Show abstract - Cite Abstract: Quantum computers offer great potential for significant speedup in executing certain algorithms compared to their classical counterparts. One of the most promising physical systems in which implementing such a device seems viable are trapped atomic ions. All of the fundamental operations needed for quantum information processing have already been experimentally demonstrated in trapped ion systems. Today, the remaining two obstacles are to improve the fidelities of these operations up to the point where quantum error correction techniques can be successfully applied, as well as to scale up the present systems to a higher number of quantum bits (qubits). This thesis addresses both issues. On the one hand, it decribes the experimental implementation of a high-fidelity two-qubit quantum logic gate, which is the most technically demanding fundamental operation to realise in practice. On the other hand, the presented work is carried out in a microfabricated surface ion trap – an architecture that holds the promise of scalability. The gate is applied directly to hyperfine "atomic clock" qubits in 43 Ca + ions using the near-field microwave magnetic field gradient produced by an integrated trap electrode. To protect the gate against fluctuating energy shifts of the qubit states, as well as to avoid the need to null the microwave field at the position of the ions, a dynamically decoupled Molmer-Sorensen scheme is employed. After accounting for state preparation and measurement errors, the achieved gate fidelity is 99.7(1)p. In previous work, the same apparatus has been used to demonstrate coherence times of T a 2 ≈ 50 s and all single-qubit operations with fidelity > 99.95p. To gain access to the "atomic clock" qubit transition in 43 Ca + , a static magnetic field of 146G is applied. The resulting energy level Zeeman-structure is spread over many times the linewidth of the atomic transition used for Doppler cooling. This thesis presents a simple and robust method for Doppler cooling and obtaining high fluorescence from this qubit in spite of the complicated level structure. A temperature of 0.3mK, slightly below the Doppler limit, is reached. 0.2% topic match

0.2%

0.1

2013

[596] Viewpoint Two Traps are Better than One A. Bylinskii, ..., and M. Cetina Journal Not Provided 2013 - 1 citations - Show abstract - Cite 0.2% topic match

0.2%

2.1

2020

[597] High-fidelity method for a single-step N -bit Toffoli gate in trapped ions J. D. Arias Espinoza, ..., and R. Gerritsma Physical Review A 2020 - 8 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.2

2006

[598] Arbitrary-speed quantum gates within large ion crystals through minimum control of laser beams Shi-Liang Zhu, ..., and L.-M. Duan EPL (Europhysics Letters) 2006 - 3 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2016

[599] Quantum information experiments with 2D arrays of hundreds of trapped ions K. Gilmore, ..., and J. Bollinger Bulletin of the American Physical Society 2016 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2007

[600] Integrated Optics Technology for Quantum Information Processing in Atomic Systems Changsoon Kim, ..., and Jungsang Kim 2007 Conference on Lasers and Electro-Optics (CLEO) 2007 - 0 citations - Show abstract - Cite 0.2% topic match

0.1%

0.2

2019

[601] Robust quantum logic for trapped ion quantum computers A. E. Webb Journal Not Provided 2019 - 1 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2022

[602] Coherent interactions and thermometry in a trapped ion quantum simulator A. Vogliano Journal Not Provided 2022 - 0 citations - Show abstract - Cite Abstract: Quantum simulators are useful tools to study exotic systems which may be otherwise intractable for a traditional computer. In particular, the trapped-ion platform has been a leading candidate for use in quantum simulation experiments because of its high fidelity state-preparation and measurement operations and its all-to-all connectivity. The relative difficulty of interacting with the long lived hyperfine states of 171Yb ions make them excellent choices for encoding information as the isolation creates stability against a noisy environment. Maintaining coherence for such a long time opens the door for complex coherent interactions, which are a backbone of quantum simulation experiments. One of the most critical coherent operations for a trapped-ion quantum simulator is the entangling Molmer-Sørenson interaction. Building up to the Molmer-Sørenson interaction requires fine control over not just the state of the quantum register, but also the motional state of the ion. For this reason, cooling to near the ground state of motion is crucial to obtaining high fidelity experiments. Characterizing the temperature in such systems can prove challenging, requiring coherent techniques. In this thesis, I describe my work towards preparing a Molmer-Sørenson interaction for a 171Yb trapped ion quantum simulator. I detail the methods used to bring-up the coherent Raman interactions, and characterize the Doppler cooling and Continuous Sideband Cooling (CSBC) techniques we use, their implementations on our system, and their limitations. I characterize the temperature of our ions before and after CSBC using coherent methods, showing a 46x improvement in the motional state population and confirming that post-CSBC the ions are in the Lamb-Dicke regime. I also summarize my efforts in constructing a future ”blade trap” system with enough precision in the alignment of the electrodes to eventually enable efficient cooling. I show preliminary evidence that 5um precision in blade position should be feasible. 0.1% topic match

0.1%

0.5

2013

[603] Trapping and cooling of 174Yb+ ions in a microfabricated surface trap R. Noek, ..., and Jungsang Kim Journal of the Korean Physical Society 2013 - 5 citations - Show abstract - Cite 0.1% topic match

0.1%

1.4

2003

[604] Quantum logic gates for hot ions without a speed limitation. Shi-Biao Zheng Physical review letters 2003 - 29 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2021

[605] Advancing the Performance of Engineered Trapped-ion Quantum Systems D. Stick Journal Not Provided 2021 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

2.0

2018

[606] Site-resolved imaging of beryllium ion crystals in a high-optical-access Penning trap with inbore optomechanics. H. Ball, ..., and M. Biercuk The Review of scientific instruments 2018 - 12 citations - Show abstract - Cite - PDF Abstract: We present the design, construction, and characterization of an experimental system capable of supporting a broad class of quantum simulation experiments with hundreds of spin qubits using 9Be+ ions in a Penning trap. This article provides a detailed overview of the core optical and trapping subsystems and their integration. We begin with a description of a dual-trap design separating loading and experimental zones and associated vacuum infrastructure design. The experimental-zone trap electrodes are designed for wide-angle optical access (e.g., for lasers used to engineer spin-motional coupling across large ion crystals) while simultaneously providing a harmonic trapping potential. We describe a near-zero-loss liquid-cryogen-based superconducting magnet, employed in both trapping and establishing a quantization field for ion spin-states and equipped with a dual-stage remote-motor LN2/LHe recondenser. Experimental measurements using a nuclear magnetic resonance (NMR) probe demonstrate part-per-million homogeneity over 7 mm-diameter cylindrical volume, with no discernible effect on the measured NMR linewidth from pulse-tube operation. Next, we describe a custom-engineered inbore optomechanical system which delivers ultraviolet (UV) laser light to the trap and supports multiple aligned optical objectives for topview and sideview imaging in the experimental trap region. We describe design choices including the use of nonmagnetic goniometers and translation stages for precision alignment. Furthermore, the optomechanical system integrates UV-compatible fiber optics which decouple the system's alignment from remote light sources. Using this system, we present site-resolved images of ion crystals and demonstrate the ability to realize both planar and three-dimensional ion arrays via control of rotating wall electrodes and radial laser beams. Looking to future work, we include interferometric vibration measurements demonstrating root-mean-square trap motion of ∼33 nm (∼117 nm) in the axial (transverse) direction; both values can be reduced when operating the magnet in free-running mode. The paper concludes with an outlook toward extensions of the experimental setup, areas for improvement, and future experimental studies. 0.1% topic match

0.1%

0.5

2022

[607] Quantum Computing With Trapped Ions: An overview Wen-Han Png, ..., and Ming-Shien Chang IEEE Nanotechnology Magazine 2022 - 1 citations - Show abstract - Cite 0.1% topic match

0.1%

0.1

2005

[608] Ion Trap Networking: Cold, Fast, and Small D. Moehring, ..., and J. Rabchuk https://doi.org/10.1142/9789812701473_0043 2005 - 2 citations - Show abstract - Cite 0.1% topic match

0.1%

0.4

2001

[609] Quantum information experiments with trapped ions: status and prospects C. Sackett Quantum Inf. Comput. 2001 - 9 citations - Show abstract - Cite 0.1% topic match

0.1%

None

[610] Elementary operations for quantum logic with a single trapped two-level cold ion beyond Lamb-Dicke limit L. F. Wei, ..., and X. Lei Journal Not Provided None - 0 citations - Show abstract - Cite Abstract: Since Shor’s algorithm for efficiently factoring large numbers was proposed [1], many studies have been carried out with a view to implement the quantum computation [2]. It has been shown that a simple rotation in the Hilbert space of an individual qubit, i.e. one-qubit gate, and a controlled rotation, such as a controlled-NOT (CN) or controlled-Z (CZ), between two different qubits, i.e. two-qubit controlled gate, are fundamental quantum gates. Any unitary transformation on arbitrarily many computational qubits can be carried out by repeatedly performing these fundamental gates [3]. Several kinds of physical systems, e.g. nuclear magnetic resonance (NMR) [4], coupled quantum dots [5] and the cavity QED [6] etc., have been proposed to implement these fundamental quantum gates. Quantum computation with trapped cold ions, introduced first by Cirac and Zoller [7], have been paid much attention theoretically and experimentally [17]. This scheme is based on the laser-ion interaction and possesses a long qubit coherence times [9]. Information is stored in the spin states of an array of trapped cold ions and manipulated by using laser pulses. In 1995, the fundamental quantum gates with a single trapped cold ion had been demonstrated experimentally [10]. In this scheme the ground and first excited states of the external vibration of the ion are used to encode the control qubit and the target qubit are encoded by two states of the internal degree freedom of the ion. However, the experimental operation involves an auxiliary atomic level and is limited in LD regime. Without performing the LD approximation and needing any auxiliary atomic level, some authors [11] [12] proposed another alternative method to realize another controlled operation, which is equivalent to the exact CN logic operation [10] apart from phase factors, in a single trapped two-level cold ion by applying a single resonant pulse. In a recent work we proved that the exact CN logic operation between the internal and external degrees of freedom of the ion can be realized assuredly by using a single off-resonant laser pulse, if the target qubit is encoded by the dressed atomic states [13]. Adopting the usual encode scheme for conveniently measuring, i.e. the target qubit is encoded by the bare atomic states (|g〉 and |e〉), we show in this paper that the fundamental quantum gates e.g. the Hadamard (H) gate and the controlled-Z (CZ) or CN gate, can be implemented exactly in a single trapped ion register by using two kinds of elementary operations generated by applying different frequencies laser pulses. The experimental parameters for these realizations are derived by analytically and numerically. The multiquantum interaction between the ion and the applied laser is considered in the present work. 0.1% topic match

0.1%

0.2

2019

[611] High-fidelity quantum logic on trapped ions with microwave radiation A. Lawrence https://doi.org/10.25560/74100 2019 - 1 citations - Show abstract - Cite 0.1% topic match

0.1%

9.9

2019

[612] Two-qubit entangling gates within arbitrarily long chains of trapped ions K. Landsman, ..., and C. Monroe Physical Review A 2019 - 51 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2016

[613] Abstract Submitted for the DAMOP16 Meeting of The American Physical Society Implementing Quantum Algorithms with Modular Gates in a Trapped C. Figgatt, ..., and C. Monroe Journal Not Provided 2016 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2015

[614] Abstract Submitted for the DAMOP15 Meeting of The American Physical Society A 2D Array of 100’s of Ions for Quantum Simulation and Many- Body Physics in a Penning Trap B. Sawyer, ..., and J. Bollinger Journal Not Provided 2015 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2012

[615] Transport of trapped-ion qubits in a scalable architecture R. B. Blakestad, ..., and D. Wineland 2012 Conference on Lasers and Electro-Optics (CLEO) 2012 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

3.4

2018

[616] Multilayer ion trap technology for scalable quantum computing and quantum simulation A. Bautista-Salvador, ..., and C. Ospelkaus New Journal of Physics 2018 - 19 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

4.1

2012

[617] Individual-ion addressing with microwave field gradients. U. Warring, ..., and D. Wineland Physical review letters 2012 - 48 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

4.5

2021

[618] TSV-integrated surface electrode ion trap for scalable quantum information processing P. Zhao, ..., and Luca Guidoni Applied Physics Letters 2021 - 16 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2018

[619] Abstract Submitted for the DAMOP18 Meeting of The American Physical Society Ground state cooling of a 2-dimensional ion array in a Pen- K. Gilmore Journal Not Provided 2018 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

2.9

2018

[620] Feedback-stabilised quantum states in a mixed-species ion system V. Negnevitsky https://doi.org/10.3929/ETHZ-B-000295923 2018 - 17 citations - Show abstract - Cite Abstract: Trapped ions are among the leading platforms for realising quantum information processing (QIP). One major challenge in constructing a large-scale QIP device will be to incorporate feedback techniques for performing quantum error correction. This thesis describes the development of a novel classical control system for ion trap quantum computing incorporating powerful real-time processing, and its use in performing a number of experiments involving such processing which form crucial building blocks for stabilizing large-scale ion trap systems. A second major component is the demonstration of multi-qubit quantum control in mixed-species ion chains, which allowed low-crosstalk error-check operations to be performed over tens of cycles in a multi-qubit system for the first time. Combined with feedback this allowed the stabilisation of entanglement over extended sequences of operations. The technical advances in the thesis are a set of control hardware and related firmware and software that is specifically designed to meet the needs of quantum error correction. It enables advanced sequences of measurement, real-time decision making and parameter adjustment needed for scalable experiments, with feedback a core element in its design. Together the feedback-capable system and mixed-species setup were used to test new protocols including a single-qubit adaptive phase estimation scheme relying on rapid real-time classical computation and low-latency parameter updates to optimally extract information, outperforming standard non-adaptive fitting in speed and flexibility. Singleand mixed-species gates between calcium and beryllium and associated experimental techniques were investigated using registers of two and three ions, leading to the first gates between qubits encoded in optical and hyperfine transitions, which reached two-qubit fidelities above 96% and three-qubit fidelities of 93.8(5)%. In preparatory steps for further work, a single-species dissipative protocol was used to prepare an entangled steady-state using a new approach devised in our group, while ion transport and separation experiments with up to four single-species and two mixedspecies ions into wells 800μm apart at excitations below ten quanta was implemented and optimised. The main scientific result of the thesis is the demonstration of the repeated extraction of quantum correlations from a pair of beryllium ions using a calcium ancilla qubit. This type of correlation measurement is critical for performing fault-tolerant algorithms. The measurement was then combined with real-time feedback in order to stabilize beryllium qubits in both subspaces and in entangled states, for sequences including up to fifty rounds of feedback, an order of magnitude more than previous work. Information on the major infidelities in the protocols was extracted from the measurement outcome correlations. This thesis concludes with an outlook for extending the role of both classical and quantum feedback in trapped-ion QIP experiments. This is the second edition of the thesis, released on the 27th of September 2018, incorporating minor corrections. The first edition was released on the 13th of July 2018. 0.1% topic match

0.1%

0.9

2008

[621] High fidelity quantum gates with ions in cryogenic microfabricated ion traps I. Chuang and J. Labaziewicz Journal Not Provided 2008 - 15 citations - Show abstract - Cite Abstract: While quantum information processing offers a tantalizing possibility of a significant speedup in execution of certain algorithms, as well as enabling previously unmanageable simulations of large quantum systems, it remains extremely difficult to realize experimentally. Recently, fundamental building blocks of a quantum computer, including one and two qubit gates, teleportation and error correction, were demonstrated using trapped atomic ions. Scaling to a larger number of qubits requires miniaturization of the ion traps, currently limited by the sharply increasing motional state decoherence at sub-100 μm ion-electrode distances. This thesis explores the source and suppression of this decoherence at cryogenic temperatures, and demonstrates fundamental logic gates in a surface electrode ion trap. Construction of the apparatus requires the development of a number of experimental techniques. Design, numerical simulation and implementation of a surface electrode ion trap is presented. Cryogenic cooling of the trap to near 4 K is accomplished by contact with a bath cryostat. Ions are loaded by ablation or photoionization, both of which are characterized in terms of generated stray fields and heat load. The bulk of new experimental results deals with measurements of electric field noise at the ion's position. Upon cooling to 6 K, the measured rates are suppressed by up to 7 orders of magnitude, more than two orders of magnitude below previously published data for similarly sized traps operated at room temperature. The observed noise depends strongly on fabrication process, which suggests further improvements are possible. The measured dependence of the electric field noise on temperature is inconsistent with published models, and can be explained using a continuous spectrum of activated fluctuators. The fabricated surface electrode traps are used to demonstrate coherent operations and the classical control required for trapped ion quantum computation. The necessary spectral properties of coherent light sources are achieved with a novel design using optical feedback to a triangular, medium finesse, cavity, followed by electronic feedback to an ultra-high finesse reference cavity. Single and two qubit operations on a single ion are demonstrated with classical fidelity in excess of 95%. Magnetic field gradient coils built into the trap allow for individual addressing of ions, a prerequisite to scaling to multiple qubits. (Copies available exclusively from MIT Libraries, Rm. 14-0551, Cambridge, MA 02139-4307. Ph. 617-253-5668; Fax 617-253-1690.) 0.1% topic match

0.1%

7.4

2002

[622] Quantum information processing with trapped ions D. Wineland, ..., and T. Schätz Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences 2002 - 160 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

18.9

2000

[623] Heating of trapped ions from the quantum ground state Q. Turchette, ..., and D. Wineland Physical Review A 2000 - 462 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2014

[624] Viewpoint: Trapped Ions Make Impeccable Qubits Jungsang Kim Physics 2014 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2003

[625] Implementation of Quantum Logic Gates Using a Two-level Trapped Ion in Cavity QED Ma Leiance Journal Not Provided 2003 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

1.1

2022

[626] Benchmarking and Analysis of Noisy Intermediate-Scale Trapped Ion Quantum Computing Architectures A. Kurlej, ..., and K. Obenland 2022 IEEE International Conference on Quantum Computing and Engineering (QCE) 2022 - 2 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2013

[627] Two — Photon Rydberg excitation of trapped strontium ions C. Maier, ..., and M. Hennrich 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC 2013 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2015

[628] Reversing Molecular Ion Formation for Quantum Simulations in a Coulomb Crystal of Be$^+$ Ions B. Sawyer, ..., and J. Bollinger Bulletin of the American Physical Society 2015 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2007

[629] Integrated optics technology for quantum information processing in atomic systems Changsoon Kim, ..., and Jungsang Kim 2007 Quantum Electronics and Laser Science Conference 2007 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.8

2014

[630] Quantum Information Processing with Trapped Ion Chains T. Manning Journal Not Provided 2014 - 8 citations - Show abstract - Cite Abstract: Title of dissertation: QUANTUM INFORMATION PROCESSING WITH TRAPPED ION CHAINS Timothy Andrew Manning, Doctor of Philosophy, 2014 Dissertation directed by: Professor Christopher Monroe Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology Trapped atomic ion systems are currently the most advanced platform for quantum information processing. Their long coherence times, pristine state initialization and detection, and precisely controllable and versatile interactions make them excellent quantum systems for experiments in quantum computation and quantum simulation. One of the more promising schemes for quantum computing consists of performing single and multi-qubit quantum gates on qubits in a linear ion crystal. Some of the key challenges of scaling such a system are the individual addressing of arbitrary subsets of ions and controlling the growing complexity of motional mode interactions as the number of qubits increases or when the gates are performed faster. Traditional entangling quantum gates between ion qubits use laser pulses to couple the qubit states to the collective motion of the crystal, thereby generating a spin-spin interaction that can produce entanglement between selected qubits. The intrinsic limitations on the performance of gates using this method can be alleviated by applying optimally shaped pulses instead of pulses with constant amplitude. This thesis explains the theory behind this pulse shaping scheme and how it is implemented on a chain of 171Yb ions held in a linear radiofrequency ‘Paul’ trap. Several experiments demonstrate the technique in chains of two, three, and five ions using various types of pulse shapes. A tightly focused individual addressing beam allows us to apply the entangling gates to a target pair of ions, and technical issues related to such tight focusing are discussed. Other advantages to the pulse shaping scheme include a robustness against detuning errors and the possibility of suppressing undesirable coupling due to optical spillover on neighboring ions. Combined with ion shuttling, we harness these features to perform sequential gates to different qubit pairs in order to create genuine tripartite entangled states and demonstrate the programmable quantum information processing capability of our system. Quantum information processing with trapped ion chains 0.1% topic match

0.1%

19.3

2021

[631] Entanglement transport and a nanophotonic interface for atoms in optical tweezers Tamara Ðorđević, ..., and M. Lukin Science 2021 - 62 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

39.6

2012

[632] Large-scale modular quantum-computer architecture with atomic memory and photonic interconnects C. Monroe, ..., and Jungsang Kim Physical Review A 2012 - 475 citations - Show abstract - Cite - PDF 0.1% topic match

0.0%

0.5

2020

[633] A Two-Dimensional Architecture for Fast Large-Scale Trapped-Ion Quantum Computing Y.-K. Wu and L. Duan arXiv: Quantum Physics 2020 - 2 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

0.8

2019

[634] Tolerable Experimental Imperfections for a Quadrupole Blade Ion Trap and Practical Qudit Gates with Trapped Ions Pei Jiang Low Journal Not Provided 2019 - 4 citations - Show abstract - Cite 0.0% topic match

0.0%

0.0

2020

[635] A Two-Dimensional Architecture for Fast Large-Scale Trapped-Ion Quantum Computing Y. Wu 吴 and L. Duan 段 Chinese Physics Letters 2020 - 0 citations - Show abstract - Cite 0.0% topic match

0.0%

7.4

2003

[636] Patterned loading of a Bose-Einstein condensate into an optical lattice Steven Eric Peil, ..., and W. Phillips Physical Review A 2003 - 157 citations - Show abstract - Cite Abstract: Neutral atoms confined in an array of magnetic or optical traps offer a scalable system for quantum information processing. Several proposals @1‐3# for providing the required coherent control of the states of individual atoms and their interactions involve optical lattices, periodic light-shift potentials produced by optical standing waves. Ideally, the lattice should be able to separate the atoms ~qubits! by more than an optical wavelength ~to allow individual optical addressing! while confining each atom to a region much smaller than an optical wavelength. Tight confinement is important in most of these proposals both to increase the interaction strength between atoms in a site @1,2# and to decrease the oscillation period, which sets the time scale for moving atoms. Here we experimentally demonstrate a technique to selectively load atoms into the motional ground state of every third site of a one-dimensional ~1D! optical lattice. This technique involves the sequential application of two independent lattices whose spatial periods differ by a factor of 3. We use the resulting ‘‘superlattice’’ to transfer atoms in a BoseEinstein condensate ~BEC! from the long-period lattice sites to the coinciding sites of the short-period lattice. The final state provides the tight confinement of the short-period lattice with a separation three times larger than the lattice period. Large separation between sites can also be achieved by using CO2 lasers @4# or arrays of optical dipole traps @5#, but these techniques require much more laser power to provide similar confinement. Patterned loading adds versatility to the atom-lattice architecture, and empty sites between atoms are in fact necessary for quantum computing proposals such as Ref. @1#. While the present experiment involves many atoms in every third plane of a single 1D lattice site, the technique can be extended to other fractional fillings and to 3D lattices, which could have single atoms in individual sites. We create each of the lattices by intersecting two laser beams at an angle u i ~see Fig. 1!. The lattice period di 5l/@2 sin(ui/2)#, where l52p/k is the laser wavelength. In this experiment, the u i are chosen such that the periods differ by a factor of 3, resulting in parallel lattices with periods of dl51.5 mm ~long lattice! and ds50.5 mm ~short lattice!. The light-shift potential is given by U~ z!52 Ul 0.0% topic match

0.0%

0.7

2018

[637] Universal trapping in a three-beam optical lattice T. V. Raziman and O. Martin Physical Review A 2018 - 4 citations - Show abstract - Cite 0.0% topic match

0.0%

0.1

2003

[638] An Optical Lattice of Ring Traps P. Verkerk and D. Hennequin arXiv: Atomic Physics 2003 - 2 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

0.0

2003

[639] Realization of a lattice of ring traps P. Verkerk and D. Hennequin 2003 European Quantum Electronics Conference. EQEC 2003 (IEEE Cat No.03TH8665) 2003 - 0 citations - Show abstract - Cite 0.0% topic match

0.0%

0.0

2019

[640] NISQ Applications on Trapped Ion Quantum Computers C. Herold Bulletin of the American Physical Society 2019 - 0 citations - Show abstract - Cite 0.0% topic match

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