Undermind Search: Experimental realizations of routing or shuttling trapped ions in two dimensions in a quantum computer. I want to find papers which specifically focus on the routing and shuttling characteristics, and only in 2 dimensions.

Research Topic

Experimental realizations of routing or shuttling trapped ions in two dimensions in a quantum computer. I want to find papers which specifically focus on the routing and shuttling characteristics, and only in 2 dimensions.

Summary

Experimental realizations of routing or shuttling trapped ions in two dimensions in a quantum computer are extensively studied and discussed in various research articles, with particularly detailed examples in references [1, 2, 3, 6, 7, 9, 11, 13, 27, 42].

The selected references provide comprehensive empirical data and theoretical frameworks on the strategies and technologies employed for 2D ion movement in quantum computing environments. For instance, [2] demonstrates precise routing using a microfabricated X-junction surface trap, while [3] explores the use of a T-junction ion trap array for 2D ion handling. Additionally, reference [27] offers a deep theoretical insight into shuttling ions through corners and junctions in 2D arrays, connecting theoretical models directly to practical experiments, thereby enhancing the understanding of not only the implementation but also the optimization required for scalable quantum computing architectures.

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

Precisely Relevant Papers on 2D Ion Shuttling and Routing

Contains papers specifically discussing the experimental realization and data on manipulating quantum ion movement in a 2D structure within quantum computing systems. References: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 22, 25, 27, 36, 42, 43, 44, 52, 69]

Technological and Experimental Advances in 2D Ion Trap Configurations

These references detail the design, fabrication, and testing of 2D ion trap arrays, focusing on architectural and engineering advancements that enable effective 2D routing and shuttling. References: [14, 15, 16, 17, 18, 20, 21, 23, 24, 26, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 45, 48, 51, 54, 55, 56, 59, 68, 73, 74, 76, 78]

Theoretical Insights and Simulation Studies Relevant to 2D Ion Movement

Compiles studies that address theoretical issues, modeling, and simulation specific to two-dimensional ion dynamics, transport scenarios, and potential operations, supporting practical implementations. References: [27, 28, 42, 47, 49, 58, 63, 67, 69, 72, 73]

Broader Advances in Quantum Computing and Ion Trap Technologies

Includes papers on broader aspects of quantum computing and ion trapping technologies that mention or imply 2D ion trapping or shuttling but mainly focus on general advancements in the field. References: [19, 46, 50, 53, 57, 60, 61, 62, 64, 65, 66, 70, 71, 75]

So far, I've closely analyzed 640 of the most promising papers, and I've found ~43-68 that are relevant, which is probably more than 90% 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

99.3%

0.0

2020

[1] Two-dimensional linear trap array for quantum information processing P. Holz, ..., and R. Blatt Journal Not Provided 2020 - 0 citations - Show abstract - Cite - PDF 99.3% topic match

Demonstrates a 2D ion-trap array for quantum computing. Presents tunable coupling and configurable connectivity in square and triangular lattices. Details trapping and 2D shuttling of ions, evidencing experimental realization.

Demonstrates a 2D ion-trap array for quantum computing. Presents tunable coupling and configurable connectivity in square and triangular lattices. Details trapping and 2D shuttling of ions, evidencing experimental realization.

98.7%

6.4

2012

[2] 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 98.7% topic match

Demonstrates controlled 2D ion transport in an X-junction trap. Utilizes a microfabricated surface-electrode ion trap optimized for minimal ion heating. Features 78 dc control electrodes for precise ion routing, showcasing experimental 2D shuttling success.

Demonstrates controlled 2D ion transport in an X-junction trap. Utilizes a microfabricated surface-electrode ion trap optimized for minimal ion heating. Features 78 dc control electrodes for precise ion routing, showcasing experimental 2D shuttling success.

98.2%

11.1

2005

[3] 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 98.2% topic match

Demonstrates a 2D ion trap array for ion shuttling and manipulation. Utilizes a T-junction structure for two-dimensional ion control, including storage and swapping. Highlights full 2D control crucial for scalable quantum computing and networks.

Demonstrates a 2D ion trap array for ion shuttling and manipulation. Utilizes a T-junction structure for two-dimensional ion control, including storage and swapping. Highlights full 2D control crucial for scalable quantum computing and networks.

98.2%

6.7

2011

[4] 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 98.2% topic match

Demonstrates 2D ion shuttling in Y-shaped surface traps. Achieves high-fidelity shuttling, with minimal ion loss over 10^6 shuttles. Addresses ion chain manipulation, relevant for quantum computing advancements.

Demonstrates 2D ion shuttling in Y-shaped surface traps. Achieves high-fidelity shuttling, with minimal ion loss over 10^6 shuttles. Addresses ion chain manipulation, relevant for quantum computing advancements.

98.0%

0.0

2006

[5] 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 98.0% topic match

Demonstrates shuttling ions in a 2D ion trap array. Ions shuttled around a 90° corner in a T-shaped, 11-zone array using controlled voltage sequences. Details strategies for designing voltage sequences for complex ion movement paths in two-dimensional configurations.

Demonstrates shuttling ions in a 2D ion trap array. Ions shuttled around a 90° corner in a T-shaped, 11-zone array using controlled voltage sequences. Details strategies for designing voltage sequences for complex ion movement paths in two-dimensional configurations.

97.6%

0.0

2023

[6] 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 97.6% topic match

Proposes a novel two-layer ion trap junction design. Design facilitates 2D qubit transport in trapped-ion quantum computers by utilizing perpendicularly oriented RF electrodes. Demonstrates stability of ion transfer, addressing manufacturing and operation challenges while avoiding pseudopotential disturbances.

Proposes a novel two-layer ion trap junction design. Design facilitates 2D qubit transport in trapped-ion quantum computers by utilizing perpendicularly oriented RF electrodes. Demonstrates stability of ion transfer, addressing manufacturing and operation challenges while avoiding pseudopotential disturbances.

97.0%

2.6

2020

[7] Ion Transport and Reordering in a 2D Trap Array Yong Wan, ..., and D. Leibfried Advanced Quantum Technologies 2020 - 11 citations - Show abstract - Cite 97.0% topic match

Demonstrates 2D ion transport and reordering in trap arrays. Utilizes interconnected traps for ion manipulation, essential for scalable quantum computing. Shows low energy gain and maintained coherence, vital for operation fidelity.

Demonstrates 2D ion transport and reordering in trap arrays. Utilizes interconnected traps for ion manipulation, essential for scalable quantum computing. Shows low energy gain and maintained coherence, vital for operation fidelity.

96.5%

0.0

2012

[8] 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 96.5% topic match

Demonstrates trapped-ion qubit transport in a 2D array. Shows ion transport while maintaining near-ground-state motion for scalability. Highlights the potential for large-scale quantum processor architectures.

Demonstrates trapped-ion qubit transport in a 2D array. Shows ion transport while maintaining near-ground-state motion for scalability. Highlights the potential for large-scale quantum processor architectures.

96.1%

4.4

2020

[9] 2D Linear Trap Array for Quantum Information Processing P. Holz, ..., and R. Blatt Advanced Quantum Technologies 2020 - 19 citations - Show abstract - Cite 96.1% topic match

Demonstrates 2D ion shuttling in a linear trap array. Features tunable coupling, configurable connectivity for various lattice structures. Trapping and transport of ions in 2D lattice achieved, with scalable design.

Demonstrates 2D ion shuttling in a linear trap array. Features tunable coupling, configurable connectivity for various lattice structures. Trapping and transport of ions in 2D lattice achieved, with scalable design.

96.0%

0.0

2024

[10] Multi-junction surface ion trap for quantum computing J. Sterk, ..., and D. Stick Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 96.0% topic match

Demonstrates a two-dimensional surface ion trap for quantum computing. Focuses on reducing power dissipation for scaling by an innovative RF electrode design. Discusses ion control, detection, and low excitation transport relevant to 2D shuttling.

Demonstrates a two-dimensional surface ion trap for quantum computing. Focuses on reducing power dissipation for scaling by an innovative RF electrode design. Discusses ion control, detection, and low excitation transport relevant to 2D shuttling.

95.9%

3.3

2022

[11] 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 95.9% topic match

Demonstrates 2D ion shuttling in a surface-electrode trap. Uses time-varying voltages on segmented control electrodes for ion routing. Specifically involves an X junction design and multispecies ion crystals.

Demonstrates 2D ion shuttling in a surface-electrode trap. Uses time-varying voltages on segmented control electrodes for ion routing. Specifically involves an X junction design and multispecies ion crystals.

95.7%

3.8

2019

[12] Segmented ion-trap fabrication using high precision stacked wafers S. Ragg, ..., and J. Home Review of Scientific Instruments 2019 - 19 citations - Show abstract - Cite - PDF 95.7% topic match

Demonstrates fabrication of 2D ion-shuttling traps. Utilizes laser-enhanced etching for high-precision multi-layer ion traps with 2D shuttling capabilities. Focuses on trap design optimization balancing pseudo-potential barriers and confinement.

Demonstrates fabrication of 2D ion-shuttling traps. Utilizes laser-enhanced etching for high-precision multi-layer ion traps with 2D shuttling capabilities. Focuses on trap design optimization balancing pseudo-potential barriers and confinement.

95.6%

9.1

2009

[13] 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 95.6% topic match

Provides experimental data on ion shuttling in a 2D array. Demonstrates high-fidelity ion transport through an X-junction in a surface trap. Focuses on minimizing kinetic energy gain and maintaining coherence during transport.

Provides experimental data on ion shuttling in a 2D array. Demonstrates high-fidelity ion transport through an X-junction in a surface trap. Focuses on minimizing kinetic energy gain and maintaining coherence during transport.

95.3%

3.4

2021

[14] 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 95.3% topic match

Describes a 3D Paul ion trap adapted for 2D ion transport. Incorporates two X-junctions for controlled two-dimensional routing of ion strings. Experimental results include heating rates and efficiency of junction transport, highlighting practical implementation.

Describes a 3D Paul ion trap adapted for 2D ion transport. Incorporates two X-junctions for controlled two-dimensional routing of ion strings. Experimental results include heating rates and efficiency of junction transport, highlighting practical implementation.

94.2%

0.0

2012

[15] Abstract Submitted for the DAMOP11 Meeting of The American Physical Society Robust microfabricated surface ion traps with arbitrary lateral geometries A. R. Ellis, ..., and J. Sterk Journal Not Provided 2012 - 0 citations - Show abstract - Cite 94.2% topic match

Demonstrates microfabricated surface ion traps with 2D geometries. Details the creation of a Y-junction trap for ion routing, utilizing tailored RF pseudopotential fields. Mentions collaboration on quantum simulations and various trap designs, including ring-shaped traps for the MUSIQC program.

Demonstrates microfabricated surface ion traps with 2D geometries. Details the creation of a Y-junction trap for ion routing, utilizing tailored RF pseudopotential fields. Mentions collaboration on quantum simulations and various trap designs, including ring-shaped traps for the MUSIQC program.

94.2%

3.1

2010

[16] Demonstration of a microfabricated surface electrode ion trap D. Stick, ..., and M. Blain arXiv: Instrumentation and Detectors 2010 - 43 citations - Show abstract - Cite - PDF 94.2% topic match

Demonstrates shuttling ions in 2D using surface electrode traps. Utilizes a microfabricated heterostructure with advanced electrode configuration for precise ion control. Details experimental techniques and modeling of voltage control for ion manipulation.

Demonstrates shuttling ions in 2D using surface electrode traps. Utilizes a microfabricated heterostructure with advanced electrode configuration for precise ion control. Details experimental techniques and modeling of voltage control for ion manipulation.

93.6%

0.0

2015

[17] 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. 93.6% topic match

Presents microfabricated Paul traps for levitating/shuttling ions in 2D. Describes the design and fabrication of Y-junction and 2D hexagonal lattice traps for scaling ion-trap architectures. Key operations and technologies for 2D ion movement in quantum computing detailed, with a focus on microfabrication techniques.

Presents microfabricated Paul traps for levitating/shuttling ions in 2D. Describes the design and fabrication of Y-junction and 2D hexagonal lattice traps for scaling ion-trap architectures. Key operations and technologies for 2D ion movement in quantum computing detailed, with a focus on microfabrication techniques.

93.2%

0.0

2019

[18] 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 93.2% topic match

Demonstrates high-fidelity 2D routing of Be ions in a Paul trap. Details methods to calculate transport potentials and reduce motional excitation. Discusses potential applications in scaling up quantum processors.

Demonstrates high-fidelity 2D routing of Be ions in a Paul trap. Details methods to calculate transport potentials and reduce motional excitation. Discusses potential applications in scaling up quantum processors.

93.0%

0.2

2020

[19] 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 93.0% topic match

Demonstrates ion reordering in a 2D trap array. Uses a junction in a 2D ion trap array for precision ion transport. Maintains coherence and low energy gain during ion movement, supporting scalability.

Demonstrates ion reordering in a 2D trap array. Uses a junction in a 2D ion trap array for precision ion transport. Maintains coherence and low energy gain during ion movement, supporting scalability.

93.0%

0.1

2013

[20] Microfabricated two-dimensional (2D) hexagonal lattice trap H. Rattanasonti, ..., and W. Hensinger 2013 IEEE SENSORS 2013 - 1 citations - Show abstract - Cite 93.0% topic match

Demonstrates a microfabricated 2D hexagonal lattice trap for ions. Successfully trapped Ytterbium ions using a high breakdown voltage (>1kV) RF system. Explores in situ control of trapping height with secondary RF potentials, indicating precise manipulation capabilities in 2D.

Demonstrates a microfabricated 2D hexagonal lattice trap for ions. Successfully trapped Ytterbium ions using a high breakdown voltage (>1kV) RF system. Explores in situ control of trapping height with secondary RF potentials, indicating precise manipulation capabilities in 2D.

92.2%

0.3

2021

[21] 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 92.2% topic match

Describes a 3D Paul ion trap modified for 2D ion transport. Incorporates dual junctions facilitating two-dimensional routing and shuttling of ion strings. Details design, simulation, fabrication, and initial testing including ion transport performance.

Describes a 3D Paul ion trap modified for 2D ion transport. Incorporates dual junctions facilitating two-dimensional routing and shuttling of ion strings. Details design, simulation, fabrication, and initial testing including ion transport performance.

91.8%

0.0

2019

[22] 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. 91.8% topic match

Demonstrates controlled inter-site coupling in a 2D ion trap array. Details the operation of a triangular array of three magnesium ions with individual control. Focuses on developing a scalable analog quantum simulator using a 2D array of trapped ions.

Demonstrates controlled inter-site coupling in a 2D ion trap array. Details the operation of a triangular array of three magnesium ions with individual control. Focuses on developing a scalable analog quantum simulator using a 2D array of trapped ions.

91.2%

0.4

2008

[23] Implementing segmented ion trap designs for quantum computing G. Imreh Journal Not Provided 2008 - 7 citations - Show abstract - Cite 91.2% topic match

Demonstrates experimental shuttling in a segmented ion trap. Features successful ion movement over 360 μm within a microfabricated trap. Focuses on single-ion shuttling, crucial for evaluating 2D routing capabilities.

Demonstrates experimental shuttling in a segmented ion trap. Features successful ion movement over 360 μm within a microfabricated trap. Focuses on single-ion shuttling, crucial for evaluating 2D routing capabilities.

90.5%

0.6

2015

[24] 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 90.5% topic match

Demonstrates 2D ion shuttling and control for quantum simulation. Uses radio-frequency fields to create 2D arrays of trapped ions in harmonic wells, enabling individual ion control. Key for scalable analog quantum simulators, focuses on tunable interactions and state preparation, not explicitly on computing tasks.

Demonstrates 2D ion shuttling and control for quantum simulation. Uses radio-frequency fields to create 2D arrays of trapped ions in harmonic wells, enabling individual ion control. Key for scalable analog quantum simulators, focuses on tunable interactions and state preparation, not explicitly on computing tasks.

89.3%

2.7

2014

[25] 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 89.3% topic match

Demonstrates a 2D planar-electrode ion-trap array operation. Utilizes phase-locked RF resonators to adjust Ca+ ion positions in 2D. Describes a miniaturized form for potential large-scale quantum simulations.

Demonstrates a 2D planar-electrode ion-trap array operation. Utilizes phase-locked RF resonators to adjust Ca+ ion positions in 2D. Describes a miniaturized form for potential large-scale quantum simulations.

89.1%

0.0

2008

[26] Optical MEMS Technology for Scalable Quantum Information Processor Jungsang Kim, ..., and F. Lu Frontiers in Optics 2008 - 0 citations - Show abstract - Cite 89.1% topic match

Demonstrates a MEMS-based beam steering system for ion routing. Enables random access to qubits in a 2-D ion array. Focuses on experimental implementation in scalable quantum information processors.

Demonstrates a MEMS-based beam steering system for ion routing. Enables random access to qubits in a 2-D ion array. Focuses on experimental implementation in scalable quantum information processors.

88.4%

4.1

2007

[27] 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 88.4% topic match

Provides a theoretical framework for ion shuttling in 2D. Discusses specific 2D ion transport scenarios, including around corners and through junctions. Connects theory to experimental results in a T junction trap for 2D transport.

Provides a theoretical framework for ion shuttling in 2D. Discusses specific 2D ion transport scenarios, including around corners and through junctions. Connects theory to experimental results in a T junction trap for 2D transport.

84.2%

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 84.2% topic match

Describes a surface-electrode ion trap junction design. Utilizes bi-objective optimization for electrode design, enhancing ion transport in 2D arrays. Suggests improvements for scalable trapped-ion quantum computing via integrated optics.

Describes a surface-electrode ion trap junction design. Utilizes bi-objective optimization for electrode design, enhancing ion transport in 2D arrays. Suggests improvements for scalable trapped-ion quantum computing via integrated optics.

84.0%

0.0

2023

[29] “Shuttled” Ions Stay Quantum Erin M. Knutson Physics 2023 - 0 citations - Show abstract - Cite 84.0% topic match

Demonstrates shuttling trapped-ion qubits without losing coherence. Preserves electronic coherence of ions while moving them between trapping sites. Focuses on the experimental realization of shuttling ions in an array, potentially 2D.

Demonstrates shuttling trapped-ion qubits without losing coherence. Preserves electronic coherence of ions while moving them between trapping sites. Focuses on the experimental realization of shuttling ions in an array, potentially 2D.

83.2%

0.5

2012

[30] 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. 83.2% topic match

Demonstrates microfabricated 2-D ion trap lattice design. Discusses the experimental setup for ytterbium ion trapping, emphasizing laser stabilization and trap design advancements. Presents Y junction design supporting adiabatic shuttling in scalable quantum computing architectures.

Demonstrates microfabricated 2-D ion trap lattice design. Discusses the experimental setup for ytterbium ion trapping, emphasizing laser stabilization and trap design advancements. Presents Y junction design supporting adiabatic shuttling in scalable quantum computing architectures.

82.4%

0.4

2019

[31] 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 82.4% topic match

Proposes a novel surface ion trap design for cooling and trapping. Features principle-axes rotation for effective ion cooling in large-scale traps. Describes shuttling and reordering ions via a Y-junction, relevant for 2D operations.

Proposes a novel surface ion trap design for cooling and trapping. Features principle-axes rotation for effective ion cooling in large-scale traps. Describes shuttling and reordering ions via a Y-junction, relevant for 2D operations.

82.2%

2.6

2020

[32] Coherently Manipulated 2D Ion Crystal in a Monolithic Paul Trap Ye Wang, ..., and Kihwan Kim Advanced Quantum Technologies 2020 - 10 citations - Show abstract - Cite 82.2% topic match

Showcases manipulation of a 2D ion crystal in a Paul trap. Demonstrates minimization of micromotion interference by electrode design for coherent operations. Targets 2D crystal management for quantum simulation and computation applications.

Showcases manipulation of a 2D ion crystal in a Paul trap. Demonstrates minimization of micromotion interference by electrode design for coherent operations. Targets 2D crystal management for quantum simulation and computation applications.

81.7%

0.0

2010

[33] 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 81.7% topic match

Demonstrates ion transport in a 'Y'-type junction. Involves a 150 zone ion trap array using surface-electrode geometry for routing ions. Preliminary tests include measuring in-situ heating rates, hinting at decoherence issues during shuttling.

Demonstrates ion transport in a 'Y'-type junction. Involves a 150 zone ion trap array using surface-electrode geometry for routing ions. Preliminary tests include measuring in-situ heating rates, hinting at decoherence issues during shuttling.

81.5%

2.1

2024

[34] 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 81.5% topic match

Demonstrates ion transport and multi-zone control in a QCCD. Achieved by integrating photonic components in a surface electrode trap. Focuses on low crosstalk, low motional excitation techniques, relevant for 2D ion routing.

Demonstrates ion transport and multi-zone control in a QCCD. Achieved by integrating photonic components in a surface electrode trap. Focuses on low crosstalk, low motional excitation techniques, relevant for 2D ion routing.

80.5%

0.3

2012

[35] 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. 80.5% topic match

Designs 2D ion trap surface array for quantum simulations. Focuses on experimental setup for trapping ions using microfabricated surface geometries. Details on applying radio-frequency voltages to traps, enhancing ion trapping quality.

Designs 2D ion trap surface array for quantum simulations. Focuses on experimental setup for trapping ions using microfabricated surface geometries. Details on applying radio-frequency voltages to traps, enhancing ion trapping quality.

79.7%

7.4

2023

[36] Controlling Two-Dimensional Coulomb Crystals of More Than 100 Ions in a Monolithic Radio-Frequency Trap D. Kiesenhofer, ..., and Christian Roos PRX Quantum 2023 - 11 citations - Show abstract - Cite - PDF 79.7% topic match

Demonstrates experimental 2D Coulomb crystal control in quantum simulations. Utilizes a novel monolithic radio-frequency trap for stable confinement of ~100 $^{40}$Ca$^+$ ions in 2D Arrays. Findings crucial for scaling up quantum computations and minimizing rf heating, complementing long-range entangling interactions studies.

Demonstrates experimental 2D Coulomb crystal control in quantum simulations. Utilizes a novel monolithic radio-frequency trap for stable confinement of ~100 $^{40}$Ca$^+$ ions in 2D Arrays. Findings crucial for scaling up quantum computations and minimizing rf heating, complementing long-range entangling interactions studies.

79.2%

0.8

2014

[37] 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 79.2% topic match

Investigates optimal electrode geometries for 2D ion-trap arrays. Shows reduction in inter-ion distance and increase in trap density with bi-layer traps. Discusses potential in quantum simulation, indicating relevance to ion routing/shuttling.

Investigates optimal electrode geometries for 2D ion-trap arrays. Shows reduction in inter-ion distance and increase in trap density with bi-layer traps. Discusses potential in quantum simulation, indicating relevance to ion routing/shuttling.

78.9%

3.3

2007

[38] 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 ... 78.9% topic match

Proposes a 2D lattice ion trap for quantum simulations. Demonstrates confining Sr88+ ions in a 2D lattice, verifying numerical trap models. Introduces a planar RF trap design facilitating microfabrication and 2D ion array creation.

Proposes a 2D lattice ion trap for quantum simulations. Demonstrates confining Sr88+ ions in a 2D lattice, verifying numerical trap models. Introduces a planar RF trap design facilitating microfabrication and 2D ion array creation.

78.0%

1.5

2023

[39] 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 78.0% topic match

Demonstrates stable trapping of ions in a 2D arrangement. Focuses on quantum simulation using 300 ions in a 2D ion trap. Details site-resolved readout and individual ion manipulation, relevant for routing/2D shuttling discussions.

Demonstrates stable trapping of ions in a 2D arrangement. Focuses on quantum simulation using 300 ions in a 2D ion trap. Details site-resolved readout and individual ion manipulation, relevant for routing/2D shuttling discussions.

77.8%

0.0

2009

[40] 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 77.8% topic match

Introduces a two-dimensional ion trap array design. Utilizes segmented electrodes for ion confinement on a planar chip. Highlights microfabrication applicability, aiding scalable quantum computing architectures.

Introduces a two-dimensional ion trap array design. Utilizes segmented electrodes for ion confinement on a planar chip. Highlights microfabrication applicability, aiding scalable quantum computing architectures.

77.4%

0.0

2015

[41] 2D Arrays of Ion Traps for Quantum Information Processing Kumph Muir Journal Not Provided 2015 - 0 citations - Show abstract - Cite 77.4% topic match

Provides designs of 2D ion trap arrays for quantum computing. Demonstrates electronic addressability and adjustable RF voltage for ion manipulation in 2D. Details the operational theory, design methodology, and fabrication of the 2D ion trap arrays.

Provides designs of 2D ion trap arrays for quantum computing. Demonstrates electronic addressability and adjustable RF voltage for ion manipulation in 2D. Details the operational theory, design methodology, and fabrication of the 2D ion trap arrays.

76.3%

0.0

2018

[42] 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 76.3% topic match

Develops a theoretical framework for 2D ion shuttling. Focuses on transport through multidimensional junctions, crucial for 2D control. References recent experiments on 2D transport in a T junction trap.

Develops a theoretical framework for 2D ion shuttling. Focuses on transport through multidimensional junctions, crucial for 2D control. References recent experiments on 2D transport in a T junction trap.

75.7%

3.3

2009

[43] 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 75.7% topic match

Demonstrates deterministic reordering of ions in a 2D framework. Utilizes a planar, linear chip trap for shuttle and reorder 40Ca+ ions. Simulations and theoretical optimizations support adiabatic reordering, relevant for ion-trap quantum computing enhancements.

Demonstrates deterministic reordering of ions in a 2D framework. Utilizes a planar, linear chip trap for shuttle and reorder 40Ca+ ions. Simulations and theoretical optimizations support adiabatic reordering, relevant for ion-trap quantum computing enhancements.

71.6%

1.8

2012

[44] 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 71.6% topic match

Demonstrates large 2D ion Coulomb crystals in a surface trap. Utilizes a specifically designed radio frequency surface ion trap to achieve anisotropic regimes for creating 2D ion configurations. Focuses on the potential for quantum simulations with large 2D systems, implying relevance to routing/shuttling in quantum computing contexts.

Demonstrates large 2D ion Coulomb crystals in a surface trap. Utilizes a specifically designed radio frequency surface ion trap to achieve anisotropic regimes for creating 2D ion configurations. Focuses on the potential for quantum simulations with large 2D systems, implying relevance to routing/shuttling in quantum computing contexts.

66.2%

0.2

2013

[45] Manipulation of Ions in Microscopic Surface-Electrode Ion Traps Wang Wei, ..., and F. Mang Chinese Physics Letters 2013 - 2 citations - Show abstract - Cite 66.2% topic match

Demonstrates manipulation of ions in surface-electrode traps. Focuses on ion separation, recombination, and reordering in a 2D trap. Includes micromotion compensation techniques, essential for accurate ion control.

Demonstrates manipulation of ions in surface-electrode traps. Focuses on ion separation, recombination, and reordering in a 2D trap. Includes micromotion compensation techniques, essential for accurate ion control.

65.2%

0.5

2011

[46] 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 65.2% topic match

Provides theoretical framework for 2D ion shuttling in planar traps. Describes electrostatic control via spherical harmonics for precise ion positioning and movement. Focuses on planar (2D) traps, crucial for experimental scalability in quantum processors.

Provides theoretical framework for 2D ion shuttling in planar traps. Describes electrostatic control via spherical harmonics for precise ion positioning and movement. Focuses on planar (2D) traps, crucial for experimental scalability in quantum processors.

64.7%

0.1

2013

[47] 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. 64.7% topic match

Introduces microfabricated ion traps for 2D quantum simulations. Develops novel trap designs including two-dimensional lattices and ring traps. Focuses on microfabrication techniques and electrode isolation for enhanced control over ion positioning.

Introduces microfabricated ion traps for 2D quantum simulations. Develops novel trap designs including two-dimensional lattices and ring traps. Focuses on microfabrication techniques and electrode isolation for enhanced control over ion positioning.

63.8%

3.0

2021

[48] 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 63.8% topic match

Proposes a method for tuning interactions in 2D ion crystals. Uses optical tweezers to adjust the sound-wave spectrum and qubit connectivity. Focuses on quantum simulation, with experimental feasibility demonstrated for tweezer patterns in 1D and 2D setups.

Proposes a method for tuning interactions in 2D ion crystals. Uses optical tweezers to adjust the sound-wave spectrum and qubit connectivity. Focuses on quantum simulation, with experimental feasibility demonstrated for tweezer patterns in 1D and 2D setups.

63.4%

0.7

2020

[49] Versatile surface ion trap with fork junction for effective cooling Xinfang Zhang, ..., and Pingxing Chen Physica Scripta 2020 - 3 citations - Show abstract - Cite 63.4% topic match

Proposes a versatile surface ion trap design. Design includes a 'fork junction' enabling ion shuttling and reordering. Focuses on theoretical modeling, not experimental realization of 2D ion movement.

Proposes a versatile surface ion trap design. Design includes a 'fork junction' enabling ion shuttling and reordering. Focuses on theoretical modeling, not experimental realization of 2D ion movement.

62.1%

3.2

2018

[50] 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 62.1% topic match

Demonstrates a 2D ion trap array for quantum simulation. Shows real-time tunable coherent coupling in a triangular ion array. Focuses on interference in 2D but lacks direct shuttling/routing detail.

Demonstrates a 2D ion trap array for quantum simulation. Shows real-time tunable coherent coupling in a triangular ion array. Focuses on interference in 2D but lacks direct shuttling/routing detail.

61.6%

0.0

2020

[51] 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 61.6% topic match

Proposes a 2D trapped-ion quantum computing architecture. Shows fast, robust entangling gates possible at large ion distances. Focuses on scalability and gate operation, not explicitly on ion routing/shuttling.

Proposes a 2D trapped-ion quantum computing architecture. Shows fast, robust entangling gates possible at large ion distances. Focuses on scalability and gate operation, not explicitly on ion routing/shuttling.

57.5%

2.8

2023

[52] 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 57.5% topic match

Proposes a Boolean satisfiability-based approach for ion shuttling optimization. Targets minimal time steps for shuttling in trapped-ion quantum computers to reduce decoherence. Includes an empirical evaluation and offers an open-source implementation.

Proposes a Boolean satisfiability-based approach for ion shuttling optimization. Targets minimal time steps for shuttling in trapped-ion quantum computers to reduce decoherence. Includes an empirical evaluation and offers an open-source implementation.

54.5%

0.9

2020

[53] Coherent rotations of qubits within a surface ion-trap quantum computer M. van Mourik, ..., and R. Blatt Physical Review A 2020 - 4 citations - Show abstract - Cite 54.5% topic match

Demonstrates physical rotations of ion chains in 2D surface trap. Uses segmented surface Paul trap, optimizing electrode voltages for qubit manipulation. Focuses on controlling trapping potentials, doesn't explicitly detail routing/shuttling paths.

Demonstrates physical rotations of ion chains in 2D surface trap. Uses segmented surface Paul trap, optimizing electrode voltages for qubit manipulation. Focuses on controlling trapping potentials, doesn't explicitly detail routing/shuttling paths.

51.5%

0.5

2013

[54] 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 51.5% topic match

Develops a surface trap for 2D ion routing in quantum computing. Focuses on optimizing trap depth and stability for Yb+ ion manipulation. Describes trap integration potential with optical cavities for enhanced ion-photon coupling.

Develops a surface trap for 2D ion routing in quantum computing. Focuses on optimizing trap depth and stability for Yb+ ion manipulation. Describes trap integration potential with optical cavities for enhanced ion-photon coupling.

51.0%

5.5

2014

[55] Fabrication and operation of a two-dimensional ion-trap lattice on a high-voltage microchip R. C. Sterling, ..., and Winfried Hensinger Nature Communications 2014 - 57 citations - Show abstract - Cite 51.0% topic match

50.8%

4.6

2011

[56] Two-dimensional arrays of radio-frequency ion traps with addressable interactions M. Kumph, ..., and R. Blatt New Journal of Physics 2011 - 62 citations - Show abstract - Cite - PDF 50.8% topic match

Describes design of 2D addressable radio-frequency ion traps. Discusses simulations and first tests, focusing on interaction management between trapped ions or particles. Experiments involve prototype arrays using dust particles, not detailed shuttling of ions in the 2D space.

Describes design of 2D addressable radio-frequency ion traps. Discusses simulations and first tests, focusing on interaction management between trapped ions or particles. Experiments involve prototype arrays using dust particles, not detailed shuttling of ions in the 2D space.

50.2%

0.5

2020

[57] 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 50.2% topic match

Proposes a 2D trapped-ion architecture for quantum computing. Illustrates using large ion arrays for fast, robust gate operations. Lacks explicit details on experimental shuttling or routing of ions in 2D.

Proposes a 2D trapped-ion architecture for quantum computing. Illustrates using large ion arrays for fast, robust gate operations. Lacks explicit details on experimental shuttling or routing of ions in 2D.

48.7%

0.3

2015

[58] 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. 48.7% topic match

Presents development theories for scalable microfabricated ion traps. Reviews microfabrication for traps and proposes shuttling through X-junctions. Focuses on microwave gates within the broader context of ion trapping.

Presents development theories for scalable microfabricated ion traps. Reviews microfabrication for traps and proposes shuttling through X-junctions. Focuses on microwave gates within the broader context of ion trapping.

45.9%

0.2

2008

[59] Planar ion chip design for scalable quantum information processing Jin-Yin Wan, ..., and Liu Liang Chinese Physics B 2008 - 3 citations - Show abstract - Cite 45.9% topic match

Proposes a planar ion chip design for quantum computing. Utilizes a two-dimensional array of linear ion traps for scalable quantum information processing with 40Ca+ ions. Focuses on the microfabrication of a scalable architecture, not directly on experimental routing or shuttling in 2D.

Proposes a planar ion chip design for quantum computing. Utilizes a two-dimensional array of linear ion traps for scalable quantum information processing with 40Ca+ ions. Focuses on the microfabrication of a scalable architecture, not directly on experimental routing or shuttling in 2D.

44.3%

1.2

2009

[60] 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 44.3% topic match

Demonstrates ion shuttling in a Penning trap array. Discusses design, simulations for optimal trap potentials, and preliminary experiments. Focuses on Penning traps, not explicitly 2D surface traps for quantum computing.

Demonstrates ion shuttling in a Penning trap array. Discusses design, simulations for optimal trap potentials, and preliminary experiments. Focuses on Penning traps, not explicitly 2D surface traps for quantum computing.

43.0%

9.9

2002

[61] 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 43.0% topic match

Demonstrates ion shuttling in a dual linear ion trap. Achieved efficient (>106 consecutive transfers) and rapid (50 µs) ion transport over 1.2 mm with negligible heating. Explores ion dynamics critical for scalable quantum computing and ion state separation.

Demonstrates ion shuttling in a dual linear ion trap. Achieved efficient (>106 consecutive transfers) and rapid (50 µs) ion transport over 1.2 mm with negligible heating. Explores ion dynamics critical for scalable quantum computing and ion state separation.

40.0%

15.3

2019

[62] Shuttling-based trapped-ion quantum information processing V. Kaushal, ..., and U. Poschinger AVS Quantum Science 2019 - 71 citations - Show abstract - Cite - PDF 40.0% topic match

Provides a review on shuttling-based trapped-ion quantum computing architecture. Discusses a uniform linear segmented multilayer trap for ion shuttling operations. Focuses on the hardware and performance of ion shuttling, not explicitly in 2D.

Provides a review on shuttling-based trapped-ion quantum computing architecture. Discusses a uniform linear segmented multilayer trap for ion shuttling operations. Focuses on the hardware and performance of ion shuttling, not explicitly in 2D.

39.7%

3.6

2020

[63] Radial Two-Dimensional Ion Crystals in a Linear Paul Trap. M. D’Onofrio, ..., and P. Richerme Physical review letters 2020 - 13 citations - Show abstract - Cite - PDF 39.7% topic match

Demonstrates experimental formation of radial 2D ion crystals. Explores 2D Coulomb crystals using ^{171}Yb^{+} ions in a linear Paul trap. Focuses on ion lattice properties and micromotion, but not on routing/shuttling mechanisms.

Demonstrates experimental formation of radial 2D ion crystals. Explores 2D Coulomb crystals using ^{171}Yb^{+} ions in a linear Paul trap. Focuses on ion lattice properties and micromotion, but not on routing/shuttling mechanisms.

38.8%

0.1

2017

[64] 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 %. 38.8% topic match

Introduces SITCONS for optimized trapped-ion shuttling. Demonstrates fast, low-excitation ion movements for quantum logic processors. Focuses on linear ion crystal transport, not explicitly in 2D.

Introduces SITCONS for optimized trapped-ion shuttling. Demonstrates fast, low-excitation ion movements for quantum logic processors. Focuses on linear ion crystal transport, not explicitly in 2D.

38.6%

0.0

2008

[65] 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 38.6% topic match

Introduces a hexagonal lattice ion trap design. Focuses on 2D quantum simulations, enabling uniform ion spacing and scalability. Preliminary testing and fabrication detailed; proposes simulation of spin models.

Introduces a hexagonal lattice ion trap design. Focuses on 2D quantum simulations, enabling uniform ion spacing and scalability. Preliminary testing and fabrication detailed; proposes simulation of spin models.

38.5%

1.8

2021

[66] Motional Squeezing for Trapped Ion Transport and Separation. R. T. Sutherland, ..., and D. Leibfried Physical review letters 2021 - 6 citations - Show abstract - Cite - PDF 38.5% topic match

Develops a theoretical framework for ion transport and separation. Shows motional squeezing facilitates ion transfer in trapping potentials, optimizing routing processes. Focuses more on theoretical aspects, lacking explicit 2D experimental data.

Develops a theoretical framework for ion transport and separation. Shows motional squeezing facilitates ion transfer in trapping potentials, optimizing routing processes. Focuses more on theoretical aspects, lacking explicit 2D experimental data.

33.5%

3.9

2006

[67] 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 33.5% topic match

Introduces a theoretical framework for ion transport in segmented Paul trap arrays. Discusses optimizing electrode potentials for near-adiabatic transport of ions between trapping zones. Focuses on theoretical and numerical methods, not explicitly experimental data on 2D routing/shuttling.

Introduces a theoretical framework for ion transport in segmented Paul trap arrays. Discusses optimizing electrode potentials for near-adiabatic transport of ions between trapping zones. Focuses on theoretical and numerical methods, not explicitly experimental data on 2D routing/shuttling.

33.4%

0.2

2015

[68] 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 33.4% topic match

Introduces a new microfabrication method for surface ion traps. Demonstrates successful ion trapping and manipulation with the fabricated chips. Lacks specific focus on 2D ion routing or shuttling experiments.

Introduces a new microfabrication method for surface ion traps. Demonstrates successful ion trapping and manipulation with the fabricated chips. Lacks specific focus on 2D ion routing or shuttling experiments.

33.2%

0.0

2023

[69] 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 33.2% topic match

Provides numerical analysis on 2D ion crystals in hybrid traps. Investigates stability and phase transitions of ytterbium ions in two-dimensional configurations. Focuses on theoretical models, lacking experimental data on specific routing or shuttling mechanisms in 2D.

Provides numerical analysis on 2D ion crystals in hybrid traps. Investigates stability and phase transitions of ytterbium ions in two-dimensional configurations. Focuses on theoretical models, lacking experimental data on specific routing or shuttling mechanisms in 2D.

32.9%

5.2

2011

[70] Microfabricated ion traps M. Hughes, ..., and W. Hensinger Contemporary Physics 2011 - 70 citations - Show abstract - Cite - PDF 32.9% topic match

Provides an introduction to microfabricated ion traps. Discusses design, fabrication, and operational principles specifically for microfabricated traps. Focuses primarily on material and electrical design considerations, not explicit 2D ion routing experiments.

Provides an introduction to microfabricated ion traps. Discusses design, fabrication, and operational principles specifically for microfabricated traps. Focuses primarily on material and electrical design considerations, not explicit 2D ion routing experiments.

32.6%

0.0

2019

[71] 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 32.6% topic match

Demonstrates stationary two-dimensional ion trapping in a Paul trap. Utilizes a simple gold-plated alumina structure to form a 2D ion crystal. Focuses on coherent ion manipulation and vibrational mode analysis, not on routing/shuttling ions.

Demonstrates stationary two-dimensional ion trapping in a Paul trap. Utilizes a simple gold-plated alumina structure to form a 2D ion crystal. Focuses on coherent ion manipulation and vibrational mode analysis, not on routing/shuttling ions.

32.2%

2.8

2022

[72] 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 32.2% topic match

Discusses backend compiler phases for QCCD architecture. Focuses on optimizing quantum circuits for trapped-ion quantum computers. Mentions ion traps and transport links, implying shuttling, but lacks explicit 2D movement details.

Discusses backend compiler phases for QCCD architecture. Focuses on optimizing quantum circuits for trapped-ion quantum computers. Mentions ion traps and transport links, implying shuttling, but lacks explicit 2D movement details.

31.6%

0.5

2018

[73] Quantum simulation with ions in micro-fabricated Penning traps Shreyansh Jain, ..., and J. Home arXiv: Quantum Physics 2018 - 3 citations - Show abstract - Cite - PDF 31.6% topic match

Proposes 2D Penning trap arrays for quantum simulation. Shows high-rate ion dipolar coupling outperforming decoherence in scalable arrays. Focuses on theoretical setup rather than experimental routing/shuttling in 2D.

Proposes 2D Penning trap arrays for quantum simulation. Shows high-rate ion dipolar coupling outperforming decoherence in scalable arrays. Focuses on theoretical setup rather than experimental routing/shuttling in 2D.

30.0%

3.3

2016

[74] Two-dimensional ion crystals in radio-frequency traps for quantum simulation P. Richerme Physical Review A 2016 - 27 citations - Show abstract - Cite - PDF 30.0% topic match

Explores extension of ion-trap quantum simulation to 2D. Demonstrates theoretical viability of a 2D ion crystal in an rf trap for quantum simulations. Lacks specific experimental details on routing/shuttling ions in 2D.

Explores extension of ion-trap quantum simulation to 2D. Demonstrates theoretical viability of a 2D ion crystal in an rf trap for quantum simulations. Lacks specific experimental details on routing/shuttling ions in 2D.

29.9%

0.7

2011

[75] 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. 29.9% topic match

Demonstrates surface-electrode ion trap fabrication and operation. Focuses on trapping 40Ca+ ions, controlling micromotion, and investigating electric field noise. Lacks explicit detail on 2D routing/shuttling of trapped ions.

Demonstrates surface-electrode ion trap fabrication and operation. Focuses on trapping 40Ca+ ions, controlling micromotion, and investigating electric field noise. Lacks explicit detail on 2D routing/shuttling of trapped ions.

29.3%

2.0

2021

[76] An open-endcap blade trap for radial-2D ion crystals Yu-Xia Xie, ..., and P. Richerme Quantum Science & Technology 2021 - 6 citations - Show abstract - Cite - PDF 29.3% topic match

Demonstrates an open-endcap blade trap for radial-2D ion confining. Details design, fabrication, and validation of confining ions in a 2D lattice. Focuses on ion confining mechanism rather than routing or shuttling in 2D.

Demonstrates an open-endcap blade trap for radial-2D ion confining. Details design, fabrication, and validation of confining ions in a 2D lattice. Focuses on ion confining mechanism rather than routing or shuttling in 2D.

26.9%

4.4

2006

[77] Quantum manipulation of trapped ions in two dimensional coulomb crystals. Diego Porras and J. Cirac Physical review letters 2006 - 81 citations - Show abstract - Cite - PDF 26.9% topic match

Demonstrates quantum gate implementations in 2D ion crystals. Focuses on coupling internal ion states with motion for two-qubit gates. Discusses decoherence due to anharmonic couplings and achievable gate fidelities.

Demonstrates quantum gate implementations in 2D ion crystals. Focuses on coupling internal ion states with motion for two-qubit gates. Discusses decoherence due to anharmonic couplings and achievable gate fidelities.

25.8%

1.8

2018

[78] 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 25.8% topic match

Presents a surface-electrode Paul trap with adjustable ion height. Demonstrates trapping and laser-cooling of 40Ca+ ions at various heights. May support vertical ion string trapping for scalable quantum computing.

Presents a surface-electrode Paul trap with adjustable ion height. Demonstrates trapping and laser-cooling of 40Ca+ ions at various heights. May support vertical ion string trapping for scalable quantum computing.

25.6%

0.0

2021

[79] Coupling the motional quantum states of spatially distant ions using a conducting wire N. V. Horne and M. Mukherjee Journal Not Provided 2021 - 0 citations - Show abstract - Cite - PDF 25.6% topic match

Develops a theoretical model for coupling ions in 2D traps. Utilizes a conducting wire to facilitate quantum state interfacing between spatially distant ions without lasers. Focuses on theoretical advancements and noise impact evaluation; lacks direct experimental data on 2D ion shuttling.

Develops a theoretical model for coupling ions in 2D traps. Utilizes a conducting wire to facilitate quantum state interfacing between spatially distant ions without lasers. Focuses on theoretical advancements and noise impact evaluation; lacks direct experimental data on 2D ion shuttling.

24.9%

0.3

2018

[80] Towards high-fidelity microwave driven multi-qubit gates on microfabricated surface ion traps T. Navickas Journal Not Provided 2018 - 2 citations - Show abstract - Cite 24.9% topic match

Focuses on technologies for high-fidelity logic gates. Describes development of surface ion traps for scalable quantum computing. Lacks explicit detail on 2D routing or shuttling experimental work.

Focuses on technologies for high-fidelity logic gates. Describes development of surface ion traps for scalable quantum computing. Lacks explicit detail on 2D routing or shuttling experimental work.

23.3%

4.5

2020

[81] 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 23.3% topic match

Introduces TILT, a linear-tape trapped-ion architecture. Focuses on minimizing ion movement and optimizing operation scheduling. Does not address 2D ion routing or shuttling explicitly.

Introduces TILT, a linear-tape trapped-ion architecture. Focuses on minimizing ion movement and optimizing operation scheduling. Does not address 2D ion routing or shuttling explicitly.

22.9%

1.9

2017

[82] Optimised surface-electrode ion-trap junctions for experiments with cold molecular ions A. Mokhberi, ..., and Stefan Willitsch New Journal of Physics 2017 - 14 citations - Show abstract - Cite - PDF 22.9% topic match

Optimizes ion-trap junctions for cold molecular ion experiments. Focuses on the design of cross and quadrupole-to-octupole junctions for ion trapping on chips. Primarily discusses molecular ions and cooling techniques, not explicitly 2D ion routing or shuttling in quantum computing.

Optimizes ion-trap junctions for cold molecular ion experiments. Focuses on the design of cross and quadrupole-to-octupole junctions for ion trapping on chips. Primarily discusses molecular ions and cooling techniques, not explicitly 2D ion routing or shuttling in quantum computing.

21.2%

15.0

2012

[83] Controlling fast transport of cold trapped ions. A. Walther, ..., and U. Poschinger Physical review letters 2012 - 182 citations - Show abstract - Cite - PDF 21.2% topic match

Demonstrates fast ion transport in a microstructured Paul trap. Achieves shuttling over 280 μm in 3.6 μs while maintaining low energy increase. Focuses on 1D shuttling; preserves quantum information during transport.

Demonstrates fast ion transport in a microstructured Paul trap. Achieves shuttling over 280 μm in 3.6 μs while maintaining low energy increase. Focuses on 1D shuttling; preserves quantum information during transport.

20.9%

5.8

2021

[84] Hybrid MEMS-CMOS ion traps for NISQ computing M. Blain, ..., and D. Stick Quantum Science & Technology 2021 - 18 citations - Show abstract - Cite 20.9% topic match

Explores advancements in MEMS-CMOS ion trap technologies. Discusses overcoming limitations for scaling ion traps in NISQ computing. No specific mention of 2D ion routing or shuttling experimental work.

Explores advancements in MEMS-CMOS ion trap technologies. Discusses overcoming limitations for scaling ion traps in NISQ computing. No specific mention of 2D ion routing or shuttling experimental work.

19.2%

1.6

2014

[85] Design of a surface electrode trap for parallel ion strings U. Tanaka, ..., and S. Urabe Journal of Physics B: Atomic, Molecular and Optical Physics 2014 - 17 citations - Show abstract - Cite 19.2% topic match

Demonstrates linear surface-electrode trap for parallel ion shuttling. Switches RF voltages to manipulate ion positions between single and double-well potentials. Focuses on one-dimensional configurations, indirectly relevant to 2D shuttling needs.

Demonstrates linear surface-electrode trap for parallel ion shuttling. Switches RF voltages to manipulate ion positions between single and double-well potentials. Focuses on one-dimensional configurations, indirectly relevant to 2D shuttling needs.

18.7%

1.5

2006

[86] A microfabricated surface-electrode ion trap in silicon J. Britton, ..., and D. Wineland arXiv: Quantum Physics 2006 - 28 citations - Show abstract - Cite - PDF 18.7% topic match

Demonstrates a microfabricated ion trap using MEMS techniques. Confines 24Mg+ ions in a single-plane electrode geometry above the surface. Focuses on trap fabrication and potential for scaling, not explicit 2D ion routing.

Demonstrates a microfabricated ion trap using MEMS techniques. Confines 24Mg+ ions in a single-plane electrode geometry above the surface. Focuses on trap fabrication and potential for scaling, not explicit 2D ion routing.

17.8%

0.0

2019

[87] 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 17.8% topic match

Introduces a novel surface ion trap design. Enables efficient cooling and manipulation of ions using principle-axes rotation. Focuses on trap design for large-scale quantum processors, not explicitly on 2D routing/shuttling experiments.

Introduces a novel surface ion trap design. Enables efficient cooling and manipulation of ions using principle-axes rotation. Focuses on trap design for large-scale quantum processors, not explicitly on 2D routing/shuttling experiments.

16.3%

0.0

2024

[88] Scalable Multispecies Ion Transport in a Grid Based Surface-Electrode Trap Robert D. Delaney, ..., and William Cody Burton Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 16.3% topic match

15.8%

0.2

2012

[89] 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 15.8% topic match

Introduces a grooved surface-electrode ion trap design. Design enhances optical access and minimizes laser scattering, improving ion confinement control. Focus on trap design specifics, not explicitly on 2D ion routing/shuttling experiments.

Introduces a grooved surface-electrode ion trap design. Design enhances optical access and minimizes laser scattering, improving ion confinement control. Focus on trap design specifics, not explicitly on 2D ion routing/shuttling experiments.

15.4%

4.6

2020

[90] Phoenix and Peregrine Ion Traps M. Revelle arXiv: Applied Physics 2020 - 18 citations - Show abstract - Cite - PDF 15.4% topic match

14.7%

5.6

2012

[91] 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 14.7% topic match

14.2%

0.2

2019

[92] 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 14.2% topic match

Introduces 3D architecture with TSVs for scalable ion traps. Uses microbump technology and TSV for better connectivity and reduced form factor. Focuses on TSV integration in surface electrodes, lacks explicit data on 2D ion shuttling.

Introduces 3D architecture with TSVs for scalable ion traps. Uses microbump technology and TSV for better connectivity and reduced form factor. Focuses on TSV integration in surface electrodes, lacks explicit data on 2D ion shuttling.

13.0%

0.1

2010

[93] 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 13.0% topic match

Demonstrates ion shuttling with integrated fluorescence optics. Focuses on ion trap design with no modification to shuttling voltage levels. Lacks a specific emphasis on 2D routing or experimental detail in two dimensions.

Demonstrates ion shuttling with integrated fluorescence optics. Focuses on ion trap design with no modification to shuttling voltage levels. Lacks a specific emphasis on 2D routing or experimental detail in two dimensions.

12.3%

0.0

2021

[94] Towards quantum simulation with two-dimensional trapped ion crystals Zhen-xing Wu and R. Lous Journal Not Provided 2021 - 0 citations - Show abstract - Cite 12.3% topic match

12.2%

1.3

2008

[95] Ideal intersections for radio-frequency trap networks J. Wesenberg Physical Review A 2008 - 21 citations - Show abstract - Cite - PDF 12.2% topic match

11.4%

0.5

2011

[96] 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 11.4% topic match

10.7%

0.0

2013

[97] 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 10.7% topic match

10.0%

1.8

2021

[98] 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 10.0% topic match

Demonstrates a silicon-based ion trap for quantum computing. The paper reveals reduced RF loss in a through-silicon-via (TSV) integrated trap. Involves comparisons of RF performances, enhancing ion trap efficiency but lacks explicit mention of 2D ion routing or shuttling.

Demonstrates a silicon-based ion trap for quantum computing. The paper reveals reduced RF loss in a through-silicon-via (TSV) integrated trap. Involves comparisons of RF performances, enhancing ion trap efficiency but lacks explicit mention of 2D ion routing or shuttling.

9.9%

0.1

2009

[99] Designing an ion trap for quantum simulation I. Buluta and S. Hasegawa Quantum Inf. Comput. 2009 - 1 citations - Show abstract - Cite 9.9% topic match

9.6%

0.0

2019

[100] 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. 9.6% topic match

Introduces holographic optical manipulation for trapped ions. Utilizes digital micro-mirror device (DMD) for precise ion addressing. Focuses on single qubit operation, lacks explicit 2D routing or shuttling details.

Introduces holographic optical manipulation for trapped ions. Utilizes digital micro-mirror device (DMD) for precise ion addressing. Focuses on single qubit operation, lacks explicit 2D routing or shuttling details.

9.4%

1.9

2020

[101] Trapped Ion Architecture for Multi‐Dimensional Quantum Simulations U. Warring, ..., and T. Schaetz Advanced Quantum Technologies 2020 - 8 citations - Show abstract - Cite 9.4% topic match

9.4%

0.0

2013

[102] 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 9.4% topic match

9.1%

4.5

2021

[103] 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 9.1% topic match

8.9%

0.4

2013

[104] 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 8.9% topic match

8.8%

0.0

2015

[105] Structural and energetic properties of molecular Coulomb crystals in a surface-electrode ion trap A. Dantan, ..., and T. Schaetz Journal Not Provided 2015 - 0 citations - Show abstract - Cite 8.8% topic match

8.8%

0.0

2009

[106] 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 8.8% topic match

8.4%

0.2

2019

[107] Design and construction of an ion trapping apparatus for quantum simulation experiments Nikhil Kotibhaskar Journal Not Provided 2019 - 1 citations - Show abstract - Cite 8.4% topic match

8.3%

0.3

2002

[108] 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 8.3% topic match

Demonstrates ion shuttling in a dual linear ion trap. Ions transferred between traps 1.2 mm apart with high efficiency and coherence. Focuses on 1D ion movement, not explicitly on 2D routing or shuttling.

Demonstrates ion shuttling in a dual linear ion trap. Ions transferred between traps 1.2 mm apart with high efficiency and coherence. Focuses on 1D ion movement, not explicitly on 2D routing or shuttling.

8.1%

0.0

2019

[109] Integrated optical trapped-ion quantum logic K. Mehta Journal Not Provided 2019 - 0 citations - Show abstract - Cite 8.1% topic match

8.0%

0.0

2008

[110] Microfabrication of a Planar Paul Trap A. Salvador and P. Ziemann Journal Not Provided 2008 - 0 citations - Show abstract - Cite 8.0% topic match

8.0%

0.5

2022

[111] Geometries and fabrication methods for 3D printing ion traps A. Quinn, ..., and D. Allcock Journal Not Provided 2022 - 1 citations - Show abstract - Cite - PDF 8.0% topic match

8.0%

4.7

2007

[112] 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 8.0% topic match

7.9%

4.1

2007

[113] 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 7.9% topic match

7.9%

0.0

2015

[114] 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 7.9% topic match

7.7%

2.5

2010

[115] Surface-electrode point Paul trap T. H. Kim, ..., and I. Chuang Physical Review A 2010 - 35 citations - Show abstract - Cite - PDF 7.7% topic match

7.5%

0.0

2023

[116] 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 7.5% topic match

7.5%

0.4

2011

[117] 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. 7.5% topic match

7.5%

15.2

2012

[118] 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 7.5% topic match

7.3%

1.7

2016

[119] 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 7.3% topic match

7.3%

0.5

2009

[120] 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 7.3% topic match

7.3%

0.0

2019

[121] Surface Ion Trap Designs for Vertical Ion Shuttling Muhammad Yousif Channa, ..., and M. Y. Soomro Journal Not Provided 2019 - 0 citations - Show abstract - Cite 7.3% topic match

7.2%

1.4

2020

[122] Design of a novel monolithic parabolic-mirror ion-trap to precisely align the RF null point with the optical focus Zhao Wang, ..., and L. Luo arXiv: Quantum Physics 2020 - 6 citations - Show abstract - Cite - PDF 7.2% topic match

7.1%

0.9

2008

[123] 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.) 7.1% topic match

7.1%

0.1

2015

[124] Scalable trap technology for quantum computing with ions A. Eltony Journal Not Provided 2015 - 1 citations - Show abstract - Cite 7.1% topic match

7.0%

0.6

2021

[125] 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 7.0% topic match

6.9%

0.0

2013

[126] 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 6.9% topic match

6.8%

0.3

2013

[127] 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 … 6.8% topic match

6.8%

0.0

2015

[128] IN SITU PLASMA REMOVAL OF SURFACE CONTAMINANTS FROM ION TRAP ELECTRODES R. Haltli Journal Not Provided 2015 - 0 citations - Show abstract - Cite 6.8% topic match

6.8%

0.0

2024

[129] Superconducting NbTi Radiofrequency Resonator for Surface ion Traps M. Schubert, ..., and B. Hampel IEEE Transactions on Applied Superconductivity 2024 - 0 citations - Show abstract - Cite 6.8% topic match

6.7%

17.5

2020

[130] Demonstration of the QCCD trapped-ion quantum computer architecture S. Moses, ..., and B. Neyenhuis arXiv: Quantum Physics 2020 - 77 citations - Show abstract - Cite - PDF 6.7% topic match

6.7%

11.5

2009

[131] 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 6.7% topic match

6.6%

3.4

2012

[132] Photon-assisted-tunneling toolbox for quantum simulations in ion traps A. Bermudez, ..., and D. Porras New Journal of Physics 2012 - 43 citations - Show abstract - Cite - PDF 6.6% topic match

6.6%

0.6

2021

[133] Controlling the Surface Roughness of Surface-Electrode Ion Trap Based on Micro-Nano Fabrication Yizhu Hou, ..., and Zhijiao Deng Coatings 2021 - 2 citations - Show abstract - Cite 6.6% topic match

6.6%

0.0

2022

[134] 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 6.6% topic match

6.5%

0.1

2008

[135] 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. 6.5% topic match

6.5%

5.9

2016

[136] 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 6.5% topic match

6.4%

None

[137] 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 6.4% topic match

6.4%

1.4

2023

[138] 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 6.4% topic match

6.3%

5.7

2022

[139] Industrially microfabricated ion trap with 1 eV trap depth S. Auchter, ..., and Jonathan Home Quantum Science & Technology 2022 - 14 citations - Show abstract - Cite - PDF 6.3% topic match

6.3%

0.4

2022

[140] 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 6.3% topic match

6.3%

0.2

2013

[141] 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 6.3% topic match

6.3%

0.0

2013

[142] 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 6.3% topic match

6.3%

0.3

2012

[143] Architecture for a scalable ion-trap quantum computer M. Harlander Journal Not Provided 2012 - 4 citations - Show abstract - Cite 6.3% topic match

6.2%

0.0

2011

[144] Manipulating the structure of ion coulomb crystals with light P. Horák, ..., and M. Drewsen 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC) 2011 - 0 citations - Show abstract - Cite 6.2% topic match

6.2%

2.5

2022

[145] 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 6.2% topic match

6.1%

0.0

2011

[146] Demonstration of integrated reflective optics in microfabricated ion traps J. Merrill, ..., and R. Slusher Journal Not Provided 2011 - 0 citations - Show abstract - Cite 6.1% topic match

6.1%

0.0

2010

[147] Scaling ion traps for quantum computing H. Uys, ..., and D. Wineland Journal Not Provided 2010 - 0 citations - Show abstract - Cite 6.1% topic match

6.0%

None

[148] Imaging of trapped ions with a microfab-7 No author found Journal Not Provided None - 0 citations - Show abstract - Cite 6.0% topic match

6.0%

2.0

2006

[149] 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 6.0% topic match

6.0%

0.4

2012

[150] Microscopic Surface-Electrode Ion Trap for Scalable Quantum Information Processing Liang Chen, ..., and M. Feng Chinese Physics Letters 2012 - 5 citations - Show abstract - Cite 6.0% topic match

5.9%

0.0

2024

[151] Non-Abelian vibron dynamics in trapped-ion arrays L. Timm, ..., and L. Santos Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 5.9% topic match

5.8%

0.0

2004

[152] 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 5.8% topic match

5.8%

2.5

2012

[153] 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 5.8% topic match

5.8%

0.0

2013

[154] Fast ion shuttling methods for segmented ion traps 1 LUDWIG De Clercq, ..., and Frieder Linden Journal Not Provided 2013 - 0 citations - Show abstract - Cite 5.8% topic match

5.7%

0.2

2006

[155] Quantum leap for quantum computing J. Minkel IEEE Spectrum 2006 - 4 citations - Show abstract - Cite 5.7% topic match

5.7%

5.3

2007

[156] 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 5.7% topic match

5.7%

0.0

2024

[157] Shuttling for Scalable Trapped-Ion Quantum Computers Daniel Schoenberger, ..., and R. Wille Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 5.7% topic match

5.7%

0.0

2012

[158] 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 5.7% topic match

5.6%

1.2

2013

[159] Two-dimensional ion trap lattice on a microchip for quantum simulation R. C. Sterling, ..., and W. Hensinger https://doi.org/10.1038/ncomms4637 2013 - 14 citations - Show abstract - Cite - PDF 5.6% topic match

5.5%

0.2

2012

[160] 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. 5.5% topic match

5.4%

0.2

2007

[161] 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 5.4% topic match

5.4%

2.0

2021

[162] 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 5.4% topic match

5.4%

4.5

2014

[163] Cryogenic surface ion trap based on intrinsic silicon M. Niedermayr, ..., and R. Blatt New Journal of Physics 2014 - 44 citations - Show abstract - Cite 5.4% topic match

5.4%

2.2

2019

[164] Two-Dimensional Arrays of RF Ion Traps with Addressable Interactions M. Kumph, ..., and R. Blatt Journal Not Provided 2019 - 12 citations - Show abstract - Cite 5.4% topic match

5.3%

6.6

2005

[165] Experimental investigation of planar ion traps C. Pearson, ..., and I. Chuang Physical Review A 2005 - 124 citations - Show abstract - Cite - PDF 5.3% topic match

5.3%

1.9

2018

[166] 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 5.3% topic match

5.3%

6.5

2013

[167] 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 5.3% topic match

5.2%

0.0

2023

[168] Bilayer crystals of trapped ions for quantum information processing S. Hawaldar, ..., and Athreya Shankar Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 5.2% topic match

5.2%

0.4

2010

[169] 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 5.2% topic match

5.2%

0.3

2006

[170] 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 5.2% topic match

5.2%

5.4

2017

[171] Trapping ions and atoms optically T. Schaetz Journal of Physics B: Atomic, Molecular and Optical Physics 2017 - 39 citations - Show abstract - Cite - PDF 5.2% topic match

5.2%

0.0

2006

[172] 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 5.2% topic match

5.2%

1.4

2007

[173] Planar geometry for trapping and separating ions and charged particles. S. Pau, ..., and J. Ramsey Analytical chemistry 2007 - 23 citations - Show abstract - Cite 5.2% topic match

5.1%

4.0

2008

[174] 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 5.1% topic match

5.1%

4.7

2014

[175] Ion traps fabricated in a CMOS foundry K. Mehta, ..., and J. Chiaverini Applied Physics Letters 2014 - 48 citations - Show abstract - Cite - PDF 5.1% topic match

5.1%

3.5

2023

[176] 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 5.1% topic match

5.0%

2.6

2021

[177] Micromotion minimisation by synchronous detection of parametrically excited motion D. P. Nadlinger, ..., and D. Lucas Journal Not Provided 2021 - 8 citations - Show abstract - Cite - PDF 5.0% topic match

5.0%

4.1

2013

[178] 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 5.0% topic match

4.9%

0.0

2015

[179] Quantum simulator for many-body electron-electron Coulomb interaction with ion traps Da-Wei Luo, ..., and Lian-Ao Wu arXiv: Quantum Physics 2015 - 0 citations - Show abstract - Cite - PDF 4.9% topic match

4.9%

0.0

2007

[180] 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 4.9% topic match

4.9%

43.8

2015

[181] Quantum spin dynamics and entanglement generation with hundreds of trapped ions J. Bohnet, ..., and J. Bollinger Science 2015 - 378 citations - Show abstract - Cite - PDF 4.9% topic match

4.8%

4.3

2020

[182] 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 4.8% topic match

4.7%

9.0

2020

[183] Integrated Optical Addressing of a Trapped Ytterbium Ion M. Ivory, ..., and L. Parazzoli Physical Review X 2020 - 33 citations - Show abstract - Cite - PDF 4.7% topic match

4.7%

3.0

2009

[184] Scalable arrays of rf Paul traps in degenerate Si J. Britton, ..., and D. Wineland Applied Physics Letters 2009 - 45 citations - Show abstract - Cite - PDF 4.7% topic match

4.7%

1.4

2023

[185] 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 4.7% topic match

4.7%

0.1

2013

[186] Optimization of double-plane surface electrode ion trap lattices F. Krauth Journal Not Provided 2013 - 1 citations - Show abstract - Cite 4.7% topic match

4.6%

0.3

2011

[187] 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 4.6% topic match

4.5%

3.4

2018

[188] 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 4.5% topic match

4.5%

0.0

2001

[189] Quantum information processing in a Penning ion trap J. Bollinger, ..., and T. Mitchell Optical Fiber Communications Conference and Exhibition 2001 - 0 citations - Show abstract - Cite 4.5% topic match

4.3%

6.3

2009

[190] 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 4.3% topic match

4.3%

3.1

2014

[191] 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 4.3% topic match

4.3%

1.3

2022

[192] 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 4.3% topic match

4.3%

21.6

2006

[193] 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 4.3% topic match

4.2%

0.8

2019

[194] 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 4.2% topic match

4.2%

0.0

2019

[195] NISQ Applications on Trapped Ion Quantum Computers C. Herold Bulletin of the American Physical Society 2019 - 0 citations - Show abstract - Cite 4.2% topic match

4.2%

0.0

2011

[196] Design of superconducting transmission line integrated surface-electrode ion-traps D. T. Meyer Journal Not Provided 2011 - 0 citations - Show abstract - Cite 4.2% topic match

4.2%

0.0

2014

[197] 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

4.1%

0.0

2012

[198] 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 4.1% topic match

4.1%

1.6

2007

[199] Planar multipole ion trap M. Debatin, ..., and M. Weidemüller Physical Review A 2007 - 27 citations - Show abstract - Cite - PDF 4.1% topic match

4.1%

1.2

2022

[200] Fabrication of surface ion traps with integrated current carrying wires enabling high magnetic field gradients M. Siegele-Brown, ..., and W. Hensinger Quantum Science & Technology 2022 - 3 citations - Show abstract - Cite - PDF 4.1% topic match

3.9%

0.0

2008

[201] 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 3.9% topic match

3.8%

3.9

2015

[202] 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 3.8% topic match

3.8%

0.0

2023

[203] Optical engineering for trapped ion quantum computing S. Mouradian https://doi.org/10.1117/12.2671668 2023 - 0 citations - Show abstract - Cite 3.8% topic match

3.8%

0.0

2015

[204] Atomic and molecular ions with photon resonators for quantum information science M. Shi Journal Not Provided 2015 - 0 citations - Show abstract - Cite 3.8% topic match

3.8%

0.6

2016

[205] 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. 3.8% topic match

3.8%

0.0

2009

[206] 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 3.8% topic match

3.7%

0.0

2021

[207] 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 3.7% topic match

3.7%

0.7

2020

[208] 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 3.7% topic match

3.7%

3.7

2006

[209] 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 3.7% topic match

3.7%

0.0

2012

[210] 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 3.7% topic match

3.6%

5.7

2020

[211] Quantum Simulations with Complex Geometries and Synthetic Gauge Fields in a Trapped Ion Chain T. Manovitz, ..., and R. Ozeri PRX Quantum 2020 - 23 citations - Show abstract - Cite - PDF 3.6% topic match

3.6%

0.1

1998

[212] Trapped ions, entanglement, and quantum computing C. Myatt, ..., and D. Wineland https://doi.org/10.1117/12.308371 1998 - 2 citations - Show abstract - Cite 3.6% topic match

3.6%

0.0

2022

[213] Doppler Cooling Considerations for Radial Trapped-Ion Crystals in Two Dimensions A. Kato, ..., and B. Blinov Quantum 2.0 Conference and Exhibition 2022 - 0 citations - Show abstract - Cite 3.6% topic match

3.6%

0.0

2018

[214] 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 3.6% topic match

3.5%

0.6

2021

[215] 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 3.5% topic match

3.5%

0.8

2015

[216] 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 3.5% topic match

3.5%

0.0

2015

[217] 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 3.5% topic match

3.5%

0.0

2016

[218] 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 3.5% topic match

3.4%

1.1

1998

[219] Simple experimental methods for trapped-ion quantum processors D. Stevens, ..., and Andrew Steane Physical Review A 1998 - 28 citations - Show abstract - Cite - PDF 3.4% topic match

3.4%

0.0

2015

[220] 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 3.4% topic match

3.4%

2.4

2019

[221] 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 3.4% topic match

3.4%

0.1

2016

[222] Scalable microchip ion traps and guides for cold molecular ions A. Mokhberi https://doi.org/10.5451/UNIBAS-006656237 2016 - 1 citations - Show abstract - Cite 3.4% topic match

3.4%

0.0

2023

[223] Simplified Assembly of Through-Silicon-Via Integrated Ion Traps P. Zhao, ..., and C. S. Tan IEEE Transactions on Components, Packaging and Manufacturing Technology 2023 - 0 citations - Show abstract - Cite 3.4% topic match

3.3%

0.0

2011

[224] 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 3.3% topic match

3.3%

1.9

2023

[225] 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 3.3% topic match

3.3%

2.2

2021

[226] 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 3.3% topic match

3.3%

0.1

2014

[227] 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. 3.3% topic match

3.3%

1.3

2009

[228] 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 3.3% topic match

3.1%

1.5

2013

[229] A Lithographically Patterned Discrete Planar Electrode Linear Ion Trap Mass Spectrometer B. J. Hansen, ..., and D. Austin Journal of Microelectromechanical Systems 2013 - 17 citations - Show abstract - Cite 3.1% topic match

3.0%

1.7

2021

[230] 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 3.0% topic match

3.0%

0.0

2023

[231] MODELING AND FABRICATING ION TRAPS FOR QUANTUM COMPUTING Adam Masters, ..., and Dr. Sylvain Marsillac Journal Not Provided 2023 - 0 citations - Show abstract - Cite 3.0% topic match

3.0%

6.2

2009

[232] 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 3.0% topic match

3.0%

4.3

2023

[233] Qubits on programmable geometries with a trapped-ion quantum processor Qiming Wu, ..., and Jiehang Zhang Journal Not Provided 2023 - 4 citations - Show abstract - Cite - PDF 3.0% topic match

3.0%

3.6

2016

[234] 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 3.0% topic match

2.9%

0.0

2015

[235] CMOS fabrication for scalable trapped-ion quantum information processing J. Alonso Journal Not Provided 2015 - 0 citations - Show abstract - Cite 2.9% topic match

2.9%

0.0

2013

[236] 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 2.9% topic match

2.9%

1.3

2012

[237] 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 2.9% topic match

2.9%

0.6

2016

[238] Novel Ion Trap Design for Strong Ion-Cavity Coupling A. M. Seco, ..., and M. Keller Atoms 2016 - 5 citations - Show abstract - Cite 2.9% topic match

2.9%

0.0

2023

[239] Research progress of ion trap quantum computing Yu-Kai Wu and Lu-Ming Duan Acta Physica Sinica 2023 - 0 citations - Show abstract - Cite 2.9% topic match

2.9%

0.7

2007

[240] Towards scaling up trapped ion quantum information processing D. Leibfried, ..., and J. Wesenberg Hyperfine Interactions 2007 - 12 citations - Show abstract - Cite 2.9% topic match

2.9%

0.5

2015

[241] Structural and energetic properties of molecular Coulomb crystals in a surface-electrode ion trap Athar Mokhberi and Stefan Willitsch New Journal of Physics 2015 - 5 citations - Show abstract - Cite 2.9% topic match

2.9%

3.9

2015

[242] Versatile microwave-driven trapped ion spin system for quantum information processing C. Piltz, ..., and C. Wunderlich Science Advances 2015 - 35 citations - Show abstract - Cite - PDF 2.9% topic match

2.9%

5.9

2007

[243] Individual addressing of trapped ions and coupling of motional and spin states using RF radiation. M. Johanning, ..., and C. Wunderlich Physical review letters 2007 - 97 citations - Show abstract - Cite - PDF 2.9% topic match

2.9%

2.1

2012

[244] 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 2.9% topic match

2.9%

4.6

2021

[245] 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 2.9% topic match

2.8%

0.1

2012

[246] Trapping of Yb+ Loaded through Photoionization in RF Ion Trap Yugo Onoda https://doi.org/10.14989/doctor.k16503 2012 - 1 citations - Show abstract - Cite Abstract: In this thesis, we present our study on loading of Yb ions produced by photoionization into a radio frequency (RF) trap. Yb is one of the attractive ion species for use in optical frequency standards and quantum information processing. Photoionization is recently applied as a method of loading of ions into the ion trap, because it has some advantages such as high e ciency and isotope-selectivity. Photoionization loading of Yb ions has been already used in several studies. However, a detailed investigation of the loading has not been conducted so far. We measure the loading rate by using the electric resonance detection of the secular motion of the trapped Yb ions. They are cooled with a helium bu er gas. Unlike the measurement using the ions trapped with help of laser cooling, we remove the e ect of the cooling e ciency from the loading rate owing to high e ciency of bu er-gas cooling. From the electric resonance signal, one can estimate the number of trapped ions. We can determine the loading cross section by using the estimated ion number. The loading cross section enables us to compare the results with those obtained in other systems. Before we measure the loading rate, we improve the method of number estimation from the electric resonance signal, and we prepare light sources for photoionization. As the improvement of the number estimation, we decrease the uncertainty in the number estimation to be approximately 10% even in the presence of anharmonicity, when the relative signal height is smaller than 0.3. This is essential because the anharmonicity accompanies the usual trap design and causes a hysteresis in the electric resonance signal. For the light source, we obtain the results not only useful for our investigation of the loading rate but also applicable to other studies using various atoms and ions. We need to develop a single-frequency and continuously frequency tunable light source at 399 nm, with which the S0 − P1 transition in Yb atoms is driven as the rst-excitation of the photoionization, in order to use the light source in a future application of the 2.8% topic match

2.8%

0.0

2020

[247] Surface Electrode Ion Trap Developed and Improvement by Oxide- First- Metal-Last Approach for High Performance Quantum Computing H.Y. Li, ..., and C. S. Tan 2020 IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits (IPFA) 2020 - 0 citations - Show abstract - Cite 2.8% topic match

2.8%

1.1

2021

[248] A microfabricated ion trap chip with a sloped loading slot to minimize exposing trapped ions to stray charges Changhyun Jung, ..., and Dong-II "Dan" Cho Quantum Science & Technology 2021 - 4 citations - Show abstract - Cite 2.8% topic match

2.6%

4.1

2012

[249] A microfabricated ion trap with integrated microwave circuitry D. Allcock, ..., and D. Lucas Applied Physics Letters 2012 - 48 citations - Show abstract - Cite - PDF 2.6% topic match

2.6%

1.9

2023

[250] 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 2.6% topic match

2.6%

0.0

2007

[251] 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 2.6% topic match

2.6%

0.1

2016

[252] Near-field microwave addressing of trapped-ion qubits for scalable quantum computation D. P. L. A. Craik Journal Not Provided 2016 - 1 citations - Show abstract - Cite Abstract: This thesis reports high-fidelity near-field spatial microwave addressing of long-lived 43 Ca + "atomic clock" qubits performed in a two-zone single-layer surface-electrode ion trap. Addressing is implemented by using two of the trap's integrated microwave electrodes, one in each zone, to drive single-qubit rotations in the zone we choose to address whilst interferometrically cancelling the microwave field at the neighbour (non-addressed) zone. Using this field-nulling scheme, we measure a Rabi frequency ratio between addressed and non-addressed zones of up to 1400, from which we calculate an addressing error (or a spin-flip probability on the qubit transition) of 1e-6. Off-resonant excitation out of the qubit state is a more significant source of error in this experiment, but we also demonstrate polarisation control of the microwave field at an error level of 2e-5, which, if combined with individual-ion addressing, would be sufficient to suppress off-resonant excitation errors to the 1e-9 level. Further, this thesis presents preliminary results obtained with a micron-scale coupled-microstrip differential antenna probe that can be scanned over an ion-trap chip to map microwave magnetic near fields. The probe is designed to enable the measurement of fields at tens of microns above electrode surfaces and to act as an effective characterisation tool, speeding up design-fabrication-characterisation cycles in the production of new prototype microwave ion-trap chips. Finally, a new multi-layer design for an ion-trap chip which displays, in simulations, a 100-fold improvement in addressing performance, is presented. The chip electrode structure is designed to use the cancelling effect of microwave return currents to produce Rabi frequency ratios of order 1000 between trap zones using a single microwave electrode (i.e. without the need for nulling fields). If realised, this chip could be used to drive individually addressed single-qubit operations on arrays of memory qubits in parallel and with high fidelity. 2.6% topic match

2.5%

0.0

2023

[253] 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 2.5% topic match

2.5%

0.0

2014

[254] 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 2.5% topic match

2.5%

0.0

2019

[255] Interacting Rydberg Ions Chi Zhang, ..., and M. Hennrich 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) 2019 - 0 citations - Show abstract - Cite 2.5% topic match

2.5%

0.0

2006

[256] Semiconductor Traps for Laser-Cooled Atomic Ions and Scalable Quantum D. Stick, ..., and C. Monroe Journal Not Provided 2006 - 0 citations - Show abstract - Cite 2.5% topic match

2.4%

0.0

2018

[257] Coherent dynamics of trapped ions within and outside the Lamb-Dicke regime M. Joshi Journal Not Provided 2018 - 0 citations - Show abstract - Cite 2.4% topic match

2.4%

0.0

2013

[258] Ion trap cavity system for strongly coupled cavity-QED E. Brama Journal Not Provided 2013 - 0 citations - Show abstract - Cite 2.4% topic match

2.4%

0.9

1998

[259] INDIVIDUAL ADDRESSING AND STATE READOUT OF TRAPPED IONS UTILIZING RF MICROMOTION Dietrich Leibfried Physical Review A 1998 - 24 citations - Show abstract - Cite - PDF 2.4% topic match

2.4%

0.0

1999

[260] Atomic ion crystals in non-neutral plasmas J. Bollinger, ..., and D. Wineland https://doi.org/10.1063/1.59373 1999 - 0 citations - Show abstract - Cite 2.4% topic match

2.4%

23.3

2021

[261] 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 2.4% topic match

2.4%

1.4

2018

[262] 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 2.4% topic match

2.3%

0.6

2019

[263] Design, Fabrication and Characterization of Surface Electrode Ion Trap Integrated with TSV P. Zhao, ..., and C. S. Tan 2019 IEEE 21st Electronics Packaging Technology Conference (EPTC) 2019 - 3 citations - Show abstract - Cite 2.3% topic match

2.3%

6.2

1997

[264] A Gated Electrostatic Ion Trap To Repetitiously Measure the Charge and m/z of Large Electrospray Ions W. Benner Analytical Chemistry 1997 - 165 citations - Show abstract - Cite 2.3% topic match

2.3%

5.3

2013

[265] Surface science for improved ion traps D. A. Hite, ..., and D. Pappas MRS Bulletin 2013 - 57 citations - Show abstract - Cite 2.3% topic match

2.3%

9.7

2021

[266] Engineering an effective three-spin Hamiltonian in trapped-ion systems for applications in quantum simulation Bárbara Andrade, ..., and Alireza Seif Quantum Science & Technology 2021 - 29 citations - Show abstract - Cite - PDF 2.3% topic match

2.3%

1.9

2007

[267] Design, microfabrication, and analysis of micrometer-sized cylindrical ion trap arrays. D. Cruz, ..., and M. Blain The Review of scientific instruments 2007 - 33 citations - Show abstract - Cite 2.3% topic match

2.2%

2.3

2019

[268] 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 2.2% topic match

2.2%

0.8

2009

[269] 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 2.2% topic match

2.1%

5.6

2017

[270] Distance scaling of electric-field noise in a surface-electrode ion trap J. Sedlacek, ..., and J. Chiaverini Physical Review A 2017 - 37 citations - Show abstract - Cite - PDF 2.1% topic match

2.1%

0.6

2014

[271] Design of an ion trap for trapping single Yb-171(+) S. De, ..., and A. Gupta Journal Not Provided 2014 - 6 citations - Show abstract - Cite 2.1% topic match

2.1%

24.6

2013

[272] A quantum information processor with trapped ions P. Schindler, ..., and R. Blatt New Journal of Physics 2013 - 269 citations - Show abstract - Cite - PDF 2.1% topic match

2.0%

0.0

2019

[273] Progress on a Surface-Electrode Ion Trap for Optical Frequency Metrology M. Delehaye, ..., and C. Lacroûte 2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC) 2019 - 0 citations - Show abstract - Cite 2.0% topic match

2.0%

0.0

2020

[274] Functional surface ion traps on a 12-inch glass wafer for quantum applications J. Tao, ..., and C. Tan arXiv: Atomic Physics 2020 - 0 citations - Show abstract - Cite - PDF 2.0% topic match

2.0%

0.0

2024

[275] 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 2.0% topic match

2.0%

0.6

2019

[276] Motional states of laser cooled Yb ions in an optimized radiofrequency trap A. Borisenko, ..., and N. Kolachevsky Laser Physics 2019 - 3 citations - Show abstract - Cite 2.0% topic match

2.0%

0.8

2014

[277] 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 2.0% topic match

2.0%

0.0

2022

[278] 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 2.0% topic match

2.0%

0.2

2010

[279] High-Q superconducting coplanar waveguide resonators for integration into molecule ion traps A. McCaughan Journal Not Provided 2010 - 3 citations - Show abstract - Cite 2.0% topic match

2.0%

0.8

2019

[280] Many-body physics and quantum simulations with strongly interacting photons J. Tangpanitanon and D. Angelakis arXiv: Quantum Physics 2019 - 4 citations - Show abstract - Cite - PDF 2.0% topic match

2.0%

1.5

1991

[281] Dynamics of charged particles in a Paul radio-frequency quadrupole trap. Prestage, ..., and Harabetian Physical review letters 1991 - 50 citations - Show abstract - Cite 2.0% topic match

1.9%

2.2

2022

[282] Quantum simulation of quantum many-body systems with ultracold two-electron atoms in an optical lattice Y. Takahashi Proceedings of the Japan Academy. Series B, Physical and Biological Sciences 2022 - 5 citations - Show abstract - Cite 1.9% topic match

1.9%

0.0

2018

[283] A circular solution for quantum simulation J. Stajic Science 2018 - 0 citations - Show abstract - Cite 1.9% topic match

1.9%

6.3

2024

[284] 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 1.9% topic match

1.9%

0.0

2007

[285] 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

1.8%

0.3

2002

[286] A tutorial review: Cold trapped ions as quantum information processors Marek Šašura and V. Buzek Journal Not Provided 2002 - 6 citations - Show abstract - Cite 1.8% topic match

1.8%

0.1

2007

[287] Simulation, Design and Test of a Novel Planar RF Micro Ion Trap M. Kroner, ..., and P. Woias TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference 2007 - 1 citations - Show abstract - Cite 1.8% topic match

1.8%

2.9

2014

[288] Fast shuttling of a trapped ion in the presence of noise Xiao-Jing Lu, ..., and A. Ruschhaupt Physical Review A 2014 - 30 citations - Show abstract - Cite - PDF 1.8% topic match

1.8%

0.3

2014

[289] Simulation and Optimization of Miniature Ring-Endcap Ion Traps Cao Jian, ..., and Huang Xueren Chinese Physics Letters 2014 - 3 citations - Show abstract - Cite 1.8% topic match

1.8%

0.1

2004

[290] 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 1.8% topic match

1.8%

2.8

2022

[291] Quantum Simulations of Interacting Systems with Broken Time-Reversal Symmetry Yotam Shapira, ..., and R. Ozeri Physical Review X 2022 - 6 citations - Show abstract - Cite - PDF 1.8% topic match

1.8%

0.0

2018

[292] 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. 1.8% topic match

1.8%

0.3

2009

[293] Three-dimensional lattice of ion traps K. Ravi, ..., and S. Rangwala Physical Review A 2009 - 4 citations - Show abstract - Cite - PDF 1.8% topic match

1.7%

0.0

2015

[294] 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 1.7% topic match

1.7%

0.0

2015

[295] 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. 1.7% topic match

1.7%

3.3

2012

[296] Techniques for Microwave Near-Field Quantum Control of Trapped Ions U. Warring, ..., and D. Wineland Physical Review A 2012 - 38 citations - Show abstract - Cite - PDF 1.7% topic match

1.6%

0.2

2005

[297] Micro mass spectrometer on a chip. D. Cruz, ..., and J. Fleming https://doi.org/10.2172/876340 2005 - 4 citations - Show abstract - Cite Abstract: The design, simulation, fabrication, packaging, electrical characterization and testing analysis of a microfabricated a cylindrical ion trap ({mu}CIT) array is presented. Several versions of microfabricated cylindrical ion traps were designed and fabricated. The final design of the individual trap array element consisted of two end cap electrodes, one ring electrode, and a detector plate, fabricated in seven tungsten metal layers by molding tungsten around silicon dioxide (SiO{sub 2}) features. Each layer of tungsten is then polished back in damascene fashion. The SiO{sub 2} was removed using a standard release processes to realize a free-hung structure. Five different sized traps were fabricated with inner radii of 1, 1.5, 2, 5 and 10 {micro}m and heights ranging from 3-24 {micro}m. Simulations examined the effects of ion and neutral temperature, the pressure and nature of cooling gas, ion mass, trap voltage and frequency, space-charge, fabrication defects, and other parameters on the ability of micrometer-sized traps to store ions. The electrical characteristics of the ion trap arrays were determined. The capacitance was 2-500 pF for the various sized traps and arrays. The resistance was in the order of 1-2 {Omega}. The inductance of the arrays was calculated to be 10-1500 pH, depending on themore » trap and array sizes. The ion traps' field emission characteristics were assessed. It was determined that the traps could be operated up to 125 V while maintaining field emission currents below 1 x 10{sup -15} A. The testing focused on using the 5-{micro}m CITs to trap toluene (C{sub 7}H{sub 8}). Ion ejection from the traps was induced by termination of the RF voltage applied to the ring electrode and current measured on the collector electrode suggested trapping of ions in 1-10% of the traps. Improvements to the to the design of the traps were defined to minimize voltage drop to the substrate, thereby increasing trapping voltage applied to the ring electrode, and to allow for electron injection into, ion ejection from, and optical access to the trapping region.« less 1.6% topic match

1.6%

0.1

2017

[298] 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 1.6% topic match

1.6%

0.6

2010

[299] Isotope-selective trapping of doubly charged Yb ions M. Schauer, ..., and J. Torgerson Physical Review A 2010 - 8 citations - Show abstract - Cite 1.6% topic match

1.6%

0.0

2007

[300] 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 1.6% topic match

1.6%

0.6

2008

[301] Simulating the Quantum Magnet A. Friedenauer, ..., and T. Schatz arXiv: Quantum Physics 2008 - 10 citations - Show abstract - Cite - PDF 1.6% topic match

1.6%

1.3

2021

[302] Coupling Two Laser-Cooled Ions via a Room-Temperature Conductor. Da An, ..., and H. Häffner Physical review letters 2021 - 4 citations - Show abstract - Cite - PDF 1.6% topic match

1.5%

3.2

2007

[303] Integrated optical approach to trapped ion quantum computation Jungsang Kim and Changsoon Kim Quantum Inf. Comput. 2007 - 54 citations - Show abstract - Cite - PDF 1.5% topic match

1.5%

0.0

2012

[304] Sisyphus cooling of polyatomic molecules M. Zeppenfeld, ..., and G. Rempe Journal Not Provided 2012 - 0 citations - Show abstract - Cite 1.5% topic match

1.5%

0.0

2017

[305] Ion microtrap technology for quantum information and precision spectroscopy J. Likforman, ..., and L. Guidoni https://doi.org/10.1364/QIM.2017.QW6A.3 2017 - 0 citations - Show abstract - Cite 1.5% topic match

1.5%

0.1

1989

[306] New ion trap for atomic frequency standard applications J. Prestage, ..., and L. Maleki Journal Not Provided 1989 - 4 citations - Show abstract - Cite 1.5% topic match

1.5%

5.2

2014

[307] Ball-grid array architecture for microfabricated ion traps N. Guise, ..., and D. Youngner arXiv: Atomic Physics 2014 - 50 citations - Show abstract - Cite - PDF 1.5% topic match

1.5%

1.0

2010

[308] 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. 1.5% topic match

1.5%

2.8

2007

[309] Transport quantum logic gates for trapped ions D. Leibfried, ..., and D. Wineland Physical Review A 2007 - 47 citations - Show abstract - Cite - PDF 1.5% topic match

1.5%

0.0

2007

[310] Building A Magnesium Ion Trap For Quantum Computation Jiajia Zhou Journal Not Provided 2007 - 0 citations - Show abstract - Cite 1.5% topic match

1.4%

1.1

2022

[311] 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 1.4% topic match

1.4%

0.4

1990

[312] Linear ion trap for second order Doppler shift reduction in frequency standard applications J. Prestage, ..., and L. Maleki Proceedings of the 43rd Annual Symposium on Frequency Control 1990 - 14 citations - Show abstract - Cite 1.4% topic match

1.4%

2.0

2018

[313] 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. 1.4% topic match

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0.4

2013

[314] Demonstration of Cold 40 Ca + Ions Confined in a Microscopic Surface-Electrode Ion Trap Chen Liang, ..., and F. Mang Chinese Physics Letters 2013 - 5 citations - Show abstract - Cite 1.4% topic match

1.4%

0.1

2015

[315] Single photons from single ions : quantum interference and distant ion interaction M. Schug https://doi.org/10.22028/D291-23094 2015 - 1 citations - Show abstract - Cite 1.4% topic match

1.4%

0.1

2008

[316] QUANTUM COMPUTATION WITH TRAPPED IONS H. Häffner, ..., and R. Blatt https://doi.org/10.1142/9789812814623_0064 2008 - 2 citations - Show abstract - Cite 1.4% topic match

1.4%

1.5

2023

[317] Rapid cooling of the in-plane motion of two-dimensional ion crystals in a Penning trap to millikelvin temperatures Wes Johnson, ..., and Scott E. Parker Physical Review A 2023 - 1 citations - Show abstract - Cite - PDF 1.4% topic match

1.4%

0.3

2014

[318] An Introduction to Trapped Ions, Scalability and Quantum Metrology A. Sinclair https://doi.org/10.1007/978-3-319-04063-9_9 2014 - 3 citations - Show abstract - Cite 1.4% topic match

1.4%

0.2

2018

[319] Nonlinear effects induced in the normalized ion density in a linear trap system for a large ion cloud. L. Pedrosa-Rodriguez, ..., and F. Diaz-Otero Journal of mass spectrometry : JMS 2018 - 1 citations - Show abstract - Cite 1.4% topic match

1.4%

0.0

2000

[320] 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. 1.4% topic match

1.3%

0.0

2010

[321] Planar Electrode Quadrupole Ion Traps B. J. Hansen, ..., and D. Austin Journal Not Provided 2010 - 0 citations - Show abstract - Cite 1.3% topic match

1.3%

0.0

1994

[322] Electric and Optical Detection of Ions Trappedin a RF Ion Trap. J. Yoda and K. Sugiyama The Review of Laser Engineering 1994 - 0 citations - Show abstract - Cite 1.3% topic match

1.3%

2.3

2003

[323] Scalable quantum processor with trapped electrons. G. Ciaramicoli, ..., and P. Tombesi Physical review letters 2003 - 49 citations - Show abstract - Cite 1.3% topic match

1.3%

1.6

2017

[324] 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 1.3% topic match

1.3%

2.2

2023

[325] 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 1.3% topic match

1.3%

0.0

2024

[326] Hamiltonian Engineering of collective XYZ spin models in an optical cavity: From one-axis twisting to two-axis counter twisting models Chengyi Luo, ..., and J. K. Thompson Journal Not Provided 2024 - 0 citations - Show abstract - Cite - PDF 1.3% topic match

1.3%

0.0

2016

[327] Experiments Towards Mitigation of Motional Heating in Trapped Ion Quantum Information Processing A. Greene Journal Not Provided 2016 - 0 citations - Show abstract - Cite 1.3% topic match

1.2%

0.0

1975

[328] Nonresonant ion trap G. Brink Review of Scientific Instruments 1975 - 2 citations - Show abstract - Cite 1.2% topic match

1.2%

0.0

2005

[329] Dual optical lattice for the study of controlled cold-atom collisions and quantum computation T. Eichler, ..., and F. Shimizu International Quantum Electronics Conference, 2005. 2005 - 0 citations - Show abstract - Cite Abstract: An optical lattice system, that traps two species of neutral atoms independently with accurate control of their mutual positions, will be used to study collisions and quantum computations with neutral atoms. A three dimensional array of ultracold atoms trapped in an optical array is a promising candidate of qubits for a quantum computer. Internal states of an atom are coupled by light, and their amplitudes can be controlled accurately by using coherent monochromatic light. All qubits are equivalent and very densely packed. Therefore, it is relatively easy to scale up the system. However, the atom in the optical lattice is difficult to move, which is necessary to execute two-qubit quantum operation. In addition it is difficult to distinguish individual atom in the lattice point, because their separation is usually less that the optical wavelength. To solve these problems one of the author proposed to use two species of atoms where two species are trapped and manipulated independently[1]. Each atomic species is controlled independently by using the optical frequency for the lattice that is relatively close to the frequency of the resonant transition of each species. The frequency of the resonant transition is different for two species, and therefore, the lattice constant is different. However, they can be equalized by using angled optical beams as shown in Fig.1 and 2. We plan to use this system to study interaction between two atoms under controlled external motion. The advantage of using this system is that all atomic pairs are always in identical condition. Therefore, it is not necessary to detect the state of single atom. We analysed also the feasibility of using this system as a quantum computer. For quantum-computer application we use one species (red atoms in Fig. 1) as memory qubits. The lattice points of this species are filled 100% from a BEC by slowly increasing the lattice potential from zero. The other lattice (blue atoms in Fig. 1) is filled from a dilute MOT, and the lattice points are sparsely filled. We use the second atom as a control unit of the computation. 1.2% topic match

1.2%

39.5

2009

[330] Quantum Computing with Trapped Ions W. Lange https://doi.org/10.1007/978-0-387-30440-3_430 2009 - 601 citations - Show abstract - Cite 1.2% topic match

1.2%

1.2

2008

[331] Two-ion Coulomb crystals of Ca + in a Penning trap. D. Crick, ..., and D. M. Segal Optics express 2008 - 19 citations - Show abstract - Cite 1.2% topic match

1.2%

1.5

2021

[332] Resolved-sideband micromotion sensing in Yb+ on the 935 nm repump transition Connor J. B. Goham and J. Britton AIP Advances 2021 - 4 citations - Show abstract - Cite - PDF 1.2% topic match

1.2%

2.4

2017

[333] A Quantum von Neumann Architecture for Large-Scale Quantum Computing in Systems with Long Coherence Times, such as Trapped Ions M. F. Brandl arXiv: Quantum Physics 2017 - 18 citations - Show abstract - Cite - PDF 1.2% topic match

1.2%

3.5

2018

[334] Fault-tolerant protection of near-term trapped-ion topological qubits under realistic noise sources A. Bermudez, ..., and Markus Müller Physical Review A 2018 - 20 citations - Show abstract - Cite - PDF 1.2% topic match

1.2%

3.0

2019

[335] Efficient isotope-selective pulsed laser ablation loading of 174Yb+ ions in a surface electrode trap. Geert Vrijsen, ..., and Jungsang Kim Optics express 2019 - 14 citations - Show abstract - Cite 1.2% topic match

1.2%

0.0

2022

[336] Interplay of Pauli blockade with electron-photon coupling in quantum dots Florian Ginzel and G. Burkard Physical Review B 2022 - 0 citations - Show abstract - Cite - PDF 1.2% topic match

1.1%

14.2

2006

[337] Scaling and suppression of anomalous heating in ion traps. L. Deslauriers, ..., and C. Monroe Physical review letters 2006 - 262 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

11.2

2009

[338] Quantum simulations with cold trapped ions M. Johanning, ..., and C. Wunderlich Journal of Physics B: Atomic, Molecular and Optical Physics 2009 - 171 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

2.0

2015

[339] Technologies for trapped-ion quantum information systems A. Eltony, ..., and I. Chuang Quantum Information Processing 2015 - 19 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

0.3

2021

[340] Shortcuts to adiabatic rotation of a two-ion chain A. Tobalina, ..., and M. Palmero Quantum Science & Technology 2021 - 1 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

0.1

2006

[341] 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 1.1% topic match

1.1%

13.3

2005

[342] Surface-electrode architecture for ion-trap quantum information processing J. Chiaverini, ..., and D. Wineland Quantum Inf. Comput. 2005 - 260 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

1.4

2023

[343] 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 1.1% topic match

1.1%

2.5

2023

[344] 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 1.1% topic match

1.1%

4.4

2023

[345] Multi-site Integrated Optical Addressing of Trapped Ions Joonhyuk Kwon, ..., and H. McGuinness Journal Not Provided 2023 - 4 citations - Show abstract - Cite - PDF 1.1% topic match

1.1%

0.9

2018

[346] 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 1.1% topic match

1.0%

0.0

2019

[347] Capture of highly charged ions in a pseudo-hyperbolic Paul trap J. Dreiling, ..., and S. Brewer Journal of Applied Physics 2019 - 0 citations - Show abstract - Cite Abstract: The confinement of ions in a radio-frequency (RF) trap (also known as a Paul trap) has proven to be advantageous in many applications. In nearly all cases, singly- or few-times-ionized atoms are created in situ within the RF trap. Highly charged ions, on the other hand, are produced more efficiently in dedicated external sources; hence, the isolation of single highly charged species in an RF trap is more involved. In this work, highly charged ions produced by an electron beam ion trap/source are extracted in bunches via an ∼7 m long beamline, which is tuned to minimize the phase-space volume of the ion bunch. The charge-state-selected ion bunch is then captured in an RF trap constructed from cylindrically symmetric electrodes with pseudohyperbolic surfaces. The RF drive parameter space is surveyed both experimentally and computationally to investigate the dynamics and map out those regions favorable for ion capture. We find that an appreciable number of Ne10+ ions are captured using an RF frequency of 2.4 MHz and an amplitude range of 120 V–220 V, with an efficiency highly dependent on the RF field phase. An experimental capture efficiency of >20% was attained, with at least 500 ions being captured by the RF trap. This is slightly higher (∼135%) than that captured by a contiguous, compact Penning trap. However, in the absence of any cooling mechanism, the observed ion-storage lifetime in the RF trap is 69 ms, a factor of ∼30 shorter than in the Penning trap; potential improvements are discussed.The confinement of ions in a radio-frequency (RF) trap (also known as a Paul trap) has proven to be advantageous in many applications. In nearly all cases, singly- or few-times-ionized atoms are created in situ within the RF trap. Highly charged ions, on the other hand, are produced more efficiently in dedicated external sources; hence, the isolation of single highly charged species in an RF trap is more involved. In this work, highly charged ions produced by an electron beam ion trap/source are extracted in bunches via an ∼7 m long beamline, which is tuned to minimize the phase-space volume of the ion bunch. The charge-state-selected ion bunch is then captured in an RF trap constructed from cylindrically symmetric electrodes with pseudohyperbolic surfaces. The RF drive parameter space is surveyed both experimentally and computationally to investigate the dynamics and map out those regions favorable for ion capture. We find that an appreciable number of Ne10+ ions are captured using an RF frequency of 2.4... 1.0% topic match

1.0%

53.8

2013

[348] Scaling the Ion Trap Quantum Processor C. Monroe and Jungsang Kim Science 2013 - 613 citations - Show abstract - Cite 1.0% topic match

1.0%

0.9

1996

[349] Dark times in the resonance fluorescence of trapped 171Yb ions caused by spontaneous quantum jumps to the 2D3/2 (F = 2) state D. Engelke and C. Tamm EPL 1996 - 25 citations - Show abstract - Cite 1.0% topic match

1.0%

0.0

1988

[350] OBSERVATION OF COMPLETE POPULATION TRAPPING IN AN EXCITED STATE OF Yb IONS H. Lehmitz, ..., and H. Harde Journal Not Provided 1988 - 0 citations - Show abstract - Cite 1.0% topic match

1.0%

0.1

2005

[351] Quantum computing with trapped ions Hartmut Häffner, ..., and Rainer Blatt EQEC '05. European Quantum Electronics Conference, 2005. 2005 - 1 citations - Show abstract - Cite 1.0% topic match

1.0%

0.0

2012

[352] Design Of a Tunable Penning Trap Anwit Roy Journal Not Provided 2012 - 0 citations - Show abstract - Cite 1.0% topic match

1.0%

0.5

2004

[353] Transmission spectra of two-dimensional quantum structures K. Manouchehri and J. B. Wang arXiv: Quantum Physics 2004 - 9 citations - Show abstract - Cite - PDF 1.0% topic match

1.0%

0.0

2016

[354] Fibre-tip microcavities for enhanced ion-photon coupling in scalable quantum information networks P. Horák, ..., and M. Keller Journal Not Provided 2016 - 0 citations - Show abstract - Cite 1.0% topic match

1.0%

0.0

2023

[355] 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 1.0% topic match

1.0%

1.8

2018

[356] 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 1.0% topic match

0.9%

2.6

2017

[357] 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 0.9% topic match

0.9%

1.5

2018

[358] Active energy transport and the role of symmetry breaking in microscopic power grids J. Huber and P. Rabl Physical Review A 2018 - 9 citations - Show abstract - Cite - PDF 0.9% topic match

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6.1

2007

[359] Simplified motional heating rate measurements of trapped ions R. Epstein, ..., and D. Wineland Physical Review A 2007 - 104 citations - Show abstract - Cite - PDF 0.9% topic match

0.9%

14.2

2018

[360] Verification of a Many-Ion Simulator of the Dicke Model Through Slow Quenches across a Phase Transition. A. Safavi-Naini, ..., and J. J. Bollinger Physical review letters 2018 - 86 citations - Show abstract - Cite - PDF 0.9% topic match

0.9%

3.9

2012

[361] Digital atom interferometer with single particle control on a discretized space-time geometry Andreas Steffen, ..., and D. Meschede Proceedings of the National Academy of Sciences 2012 - 47 citations - Show abstract - Cite - PDF 0.9% topic match

0.9%

0.0

2022

[362] 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 0.9% topic match

0.9%

0.7

2019

[363] ILP-Based Scheduling for Linear-Tape Model Trapped-Ion Quantum Computers Xin-Chuan Wu Journal Not Provided 2019 - 4 citations - Show abstract - Cite 0.9% topic match

0.9%

0.5

2008

[364] The 'hybrid cell': a new compensated infinity cell for larger radius ion excitation in Fourier transform ion cyclotron resonance mass spectrometry. Sunghwan Kim, ..., and A. Marshall Rapid communications in mass spectrometry : RCM 2008 - 8 citations - Show abstract - Cite 0.9% topic match

0.9%

0.0

2019

[365] Networking Trapped-ion Quantum Computers C. Ballance, ..., and D. Lucas Quantum Information and Measurement (QIM) V: Quantum Technologies 2019 - 0 citations - Show abstract - Cite 0.9% topic match

0.9%

0.0

2017

[366] 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). 0.9% topic match

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0.4

2014

[367] Quantum simulation of pairing Hamiltonians with nearest-neighbor-interacting qubits Zhixin Wang, ..., and Yu-xi Liu Physical Review A 2014 - 4 citations - Show abstract - Cite - PDF 0.9% topic match

0.8%

0.3

2016

[368] Semi-analytical model for quasi-double-layer surface electrode ion traps Jian Zhang, ..., and Yaohua Wang Chinese Physics B 2016 - 2 citations - Show abstract - Cite 0.8% topic match

0.8%

1.3

2022

[369] Laser cooling of trapped ions in strongly inhomogeneous magnetic fields Richard Karl, ..., and S. Willitsch Molecular Physics 2022 - 2 citations - Show abstract - Cite - PDF 0.8% topic match

0.8%

0.7

2000

[370] Atom chips R. Folman, ..., and J. Schmiedmayer Conference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504) 2000 - 17 citations - Show abstract - Cite 0.8% topic match

0.8%

10.6

2016

[371] Trapped-Ion Quantum Logic with Global Radiation Fields. S. Weidt, ..., and W. Hensinger Physical review letters 2016 - 89 citations - Show abstract - Cite - PDF 0.8% topic match

0.8%

0.0

2017

[372] Noise sensing and quantum simulation with trapped atomic ions D. Gorman Journal Not Provided 2017 - 0 citations - Show abstract - Cite Abstract: Author(s): Gorman, Dylan J | Advisor(s): Haeffner, Hartmut | Abstract: In this work, we present a novel method to couple any two vibrational modes of a single trapped ion, allowing energy to be swapped between the two modes. We use the scheme to perform ground state cooling and heating rate measurements of vibrational modes without direct optical access. This lessens experimental design constraints in trapped ion experi- ments, particularly in surface trap apparatus where optical access can be difficult.We use a single ion as an electric-field noise sensor to study noise processes originating on the metallic surfaces of microfabricated ion traps. We show that realistic models of surface noise predict a specific polarization of the electric-field fluctuations relative to the trap geometry. In contrast, technical noise sources predict a different polarization direction and magnitude which can be inferred by electrostatic simulation of the trapping electrodes. We show that, by comparing heating rates of the two radial modes of a single trapped ion, one can determine whether technical noise sources are a significant contribution to heating. This is an important test for experiments aimed at studying surface noise effects. We also study dephasing due to surface noise, in which the electric potential curvature due to surface noise sources disturbs the phase of the ion motion. We measure the dephasing time for trapped ion motion. Using a noise model featuring dipolar noise sources, we probe the power spectrum of surface noise effects. These measurements, especially if repeated in a trap with smaller ion-electrode distances, may yield new insights as to the physical origin of surface noise effects.We demonstrate a two-ion quantum simulation of vibrationally-assisted energy transfer, an important phenomenon in biochemical energy transfer. We show that the quantum simulator performs well when benchmarked against exact numerical simulation. We believe that our approach can be scaled to more complicated systems beyond the reach of classical simulation, and discuss several methods for extending the simulation. 0.8% topic match

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0.4

2001

[373] 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 0.8% topic match

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1.8

2020

[374] Probing surface charge densities on optical fibers with a trapped ion F. Ong, ..., and T. Northup New Journal of Physics 2020 - 8 citations - Show abstract - Cite - PDF 0.8% topic match

0.8%

0.8

2018

[375] Correcting symmetry imperfections in linear multipole traps. J. Pedregosa-Gutierrez, ..., and M. Knoop The Review of scientific instruments 2018 - 5 citations - Show abstract - Cite - PDF 0.8% topic match

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0.5

2022

[376] Control of dephasing in spin qubits during coherent transport in silicon M. Feng, ..., and A. Saraiva Physical Review B 2022 - 1 citations - Show abstract - Cite - PDF 0.8% topic match

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0.0

2012

[377] The Planar Electrode Linear Ion Trap B. J. Hansen, ..., and D. Austin Journal Not Provided 2012 - 0 citations - Show abstract - Cite 0.8% topic match

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12.5

2022

[378] Energy dynamics, heat production and heat–work conversion with qubits: toward the development of quantum machines L. Arrachea Reports on Progress in Physics 2022 - 27 citations - Show abstract - Cite - PDF 0.8% topic match

0.7%

0.0

2010

[379] A Rydberg Quantum Simulator for Dissipative Dynamics H. B. uchler Bulletin of the American Physical Society 2010 - 0 citations - Show abstract - Cite 0.7% topic match

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0.1

2011

[380] Ion Trap Quantum Computing Christos Tsampardoukas Journal Not Provided 2011 - 1 citations - Show abstract - Cite 0.7% topic match

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0.7

2023

[381] 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 0.7% topic match

0.7%

5.5

2011

[382] 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 0.7% topic match

0.7%

0.0

1994

[383] Hot-electron transport in quantum structures N Mori and C Hamaguchi Semiconductor Science and Technology 1994 - 0 citations - Show abstract - Cite 0.7% topic match

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0.0

2007

[384] Algorithms and Architectures for Quantum Computers I. Chuang, ..., and Kenan Diab Journal Not Provided 2007 - 0 citations - Show abstract - Cite 0.7% topic match

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0.2

1991

[385] Analytic potential in a linear radio-frequency quadrupole trap with cylindrical electrodes R. K. Melbourne, ..., and L. Maleki Journal of Applied Physics 1991 - 6 citations - Show abstract - Cite 0.7% topic match

0.7%

3.0

2017

[386] 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 0.7% topic match

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4.7

2017

[387] Optical Trapping of Ion Coulomb Crystals Julian Schmidt, ..., and T. Schaetz arXiv: Quantum Physics 2017 - 31 citations - Show abstract - Cite - PDF 0.7% topic match

0.7%

1.4

1992

[388] Planar ion microtraps. Richard G. Brewer, ..., and R. Kallenbach Physical review. A, Atomic, molecular, and optical physics 1992 - 45 citations - Show abstract - Cite 0.7% topic match

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1.6

2017

[389] In situ upgrade of quantum simulators to universal computers B. Dive, ..., and D. Burgarth Quantum 2017 - 12 citations - Show abstract - Cite - PDF 0.7% topic match

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4.0

2013

[390] 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 0.7% topic match

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5.1

2012

[391] A Viewpoint on : Microscopic model of electric-field-noise heating in ion traps A. Safavi-Naini, ..., and H. Sadeghpour Journal Not Provided 2012 - 64 citations - Show abstract - Cite Abstract: Considering how it affects science and technology, surprisingly little is known about the electric field noise generated near the surface of metals. Now, in a theoretical paper appearing in Physical Review A, Arghavan SafaviNaini at the Massachusetts Institute of Technology in Cambridge and colleagues have uncovered a source of noise from the surfaces of metals that has been a major headache for ion trapping experiments. They argue that electrical dipoles, formed by impurity atoms adsorbed on the metal electrodes of an ion trap, cause noise of just the right strength and characteristics to explain the noise that has been observed in ion trap experiments [1]. Their work provides a guideline for attacking electric field noise and could impact many fields, including surface and materials science, modern electronics, quantum information technology, and precision tests of fundamental physics. Scientists in all of these disciplines strive to have an electrically quiet environment for their measurements. Is there, however, a fundamental lower limit for electric noise generated by an ordinary conductor, such as a piece of gold? Although electric field (or voltage) noise from the thermal motion of the freely moving electrons inside a conductor is well understood, this so-called JohnsonNyquist noise is typically not the sole source. In practice, nonequilibrium noise mechanisms, such as flicker and shot noise, often dominate device performance. Controlling noise is particularly important for modern applications that use ion traps, such as ion-trap quantum computing. In ion traps, electrodes, usually metallic, generate electric fields that confine the ions to a small volume close by. When researchers started laser-cooling ions to the ground state of the trap, they expected that the ions would stay cold for many minutes. However, electric field noise from the trap electrodes heated up the ions within milliseconds, several orders of magnitude faster than what was expected from Johnson-Nyquist noise [2, 3]. The intensity of this unexpected noise appeared to drop with the ion’s distance d from the metal as 1/d4 and the noise appeared to be thermally activated [4]. Trying to piece the puzzle together, researchers tried a host of different metals and even tested traps with semiconducting and superconducting electrodes. Still, no clear picture of what was causing the excessive noise emerged and even initially promising models could not explain the size of the field noise [3]. Early on, researchers guessed that the 1/d4 scaling could be the result of a large number of uncorrelated electrical-dipole-type noise sources sitting on the metal surfaces. For example, in the so-called patch-potential model, dipolelike fields are caused by patches on the surface of a metal in which the electrons have a different work function compared to other regions on the surface. In this model, the noise arises because the patches fluctuate as impurities adsorbed on the trap electrodes diffuse around the surface, similar to the mechanism causing flicker noise in field-emission tips [3, 5]. The model seemed plausible, since even the electrode surfaces in an ultrahigh vacuum ion trap apparatus can be strongly contaminated [5]. It turned out, however, that the surface patch model predicted noise that was much lower in spectral densities than what was observed [3]. Researchers tried to think of mechanisms other than diffusing impurities that would lead to patches and increased noise. Grain boundaries, material interfaces, and the bulk of the material itself were suspected to contribute to the noise, but a clear mechanism to explain it was lacking. One reason researchers were reluctant to abandon the patch model was that scientists in other fields were also encountering problems related to patches, although in different frequency and distance regimes. For example, scanning probe microscopy [6], the detection of Casimir forces [7], measurements of free fall of charged particles [8], and tests of general relativity [9] all encounter patch-potential effects. In all of this work, one important aspect might have been underestimated: Impurity atoms adsorb on the surfaces and the individual adsorbed atoms form electrical dipoles (Fig. 1). The thermal motion of these adsorbed 0.7% topic match

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0.0

2016

[392] Semi-analytical model for quasi-double-layer surface electrode ion traps J. Zhang 张, ..., and Y. Wang 王 Chinese Physics B 2016 - 0 citations - Show abstract - Cite 0.7% topic match

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2.1

2016

[393] An Integrated Mirror and Surface Ion Trap with a Tunable Trap Location A. Rynbach, ..., and Jungsang Kim arXiv: Quantum Physics 2016 - 17 citations - Show abstract - Cite - PDF 0.7% topic match

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0.0

2014

[394] Cold molecular ions on a chip A. Mokhberi and S. Willitsch https://doi.org/10.1103/PhysRevA.90.023402 2014 - 0 citations - Show abstract - Cite - PDF 0.6% topic match

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0.0

2016

[395] 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 0.6% topic match

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1.2

2023

[396] Individually tunable tunnelling coefficients in optical lattices using local periodic driving Georgia M. Nixon, ..., and Ulrich Schneider Journal Not Provided 2023 - 1 citations - Show abstract - Cite - PDF 0.6% topic match

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1.4

2006

[397] Novel designs for Penning ion traps J. Castrejón-Pita, ..., and R. Thompson Journal of Modern Optics 2006 - 25 citations - Show abstract - Cite - PDF 0.6% topic match

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0.2

2019

[398] Design Considerations and Fabrication Challenges of Surface Electrode Ion Trap with TSV Integration J. Tao, ..., and C. S. Tan 2019 International 3D Systems Integration Conference (3DIC) 2019 - 1 citations - Show abstract - Cite 0.6% topic match

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1.7

2016

[399] Intrinsic errors in transporting a single-spin qubit through a double quantum dot Xiao Li, ..., and S. Sarma Physical Review A 2016 - 14 citations - Show abstract - Cite - PDF 0.6% topic match

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0.4

2020

[400] Spatial configurations and temperature profiles in nonequilibrium steady state of two-species trapped ion systems. A. Ruiz-García and Daniel Alonso Physical review. E 2020 - 2 citations - Show abstract - Cite 0.6% topic match

0.6%

8.1

2009

[401] Colloquium: Trapped ions as quantum bits: Essential numerical tools K. Singer, ..., and F. Schmidt-Kaler Reviews of Modern Physics 2009 - 119 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

2.9

2008

[402] Electric field noise above surfaces: A model for heating rate scaling law in ion traps R. Dubessy, ..., and L. Guidoni CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference 2008 - 45 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.6

2016

[403] Noise-induced transport in the motion of trapped ions C. Cormick and C. Schmiegelow Physical Review A 2016 - 5 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.0

1993

[404] A miniature linear RF ion trap J. Gilligan, ..., and D. Wineland Journal Not Provided 1993 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

0.7

2012

[405] Optically induced structural phase transitions in ion Coulomb crystals P. Horák, ..., and M. Drewsen Physical Review A 2012 - 8 citations - Show abstract - Cite 0.6% topic match

0.6%

0.6

2022

[406] Robust quantum control for higher order coupling term in trapped ions Jing-Bo Wang Journal Not Provided 2022 - 1 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

25.5

2014

[407] Ion-trap measurements of electric-field noise near surfaces M. Brownnutt, ..., and R. Blatt Reviews of Modern Physics 2014 - 251 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.0

2009

[408] Coherent coupling of ion Coulomb crystals to different transverse modes of an optical cavity M. Albert, ..., and M. Drewsen CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference 2009 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

5.6

2002

[409] Simulation of quantum dynamics with quantum optical systems E. Jané, ..., and J. Cirac Quantum Inf. Comput. 2002 - 123 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.0

2019

[410] Rydberg atoms, topological order and quantum magnets Sylvain de Léśleuc, ..., and S. Léséleuc Journal Club for Condensed Matter Physics 2019 - 0 citations - Show abstract - Cite 0.6% topic match

0.6%

4.1

2013

[411] One-dimensional array of ion chains coupled to an optical cavity M. Cetina, ..., and V. Vuletić New Journal of Physics 2013 - 47 citations - Show abstract - Cite - PDF 0.6% topic match

0.6%

0.4

2011

[412] Quantum information processing and metrology with trapped ions Astro Ltd Journal Not Provided 2011 - 6 citations - Show abstract - Cite 0.6% topic match

0.6%

0.9

1998

[413] Single atom experiments in cavities and traps H. Walther Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences 1998 - 25 citations - Show abstract - Cite 0.6% topic match

0.5%

0.8

2019

[414] 3D Integration of CMOS-Compatible Surface Electrode Ion Trap and Silicon Photonics for Scalable Quantum Computing J. Tao, ..., and C. S. Tan 2019 IEEE 69th Electronic Components and Technology Conference (ECTC) 2019 - 4 citations - Show abstract - Cite 0.5% topic match

0.5%

2.2

2020

[415] 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 0.5% topic match

0.5%

0.0

2018

[416] Initial Control Parameters Propagate Evaluate Fidelity Efficiently Update Control Parameters Target B. Dive, ..., and D. Burgarth Journal Not Provided 2018 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

2.2

2018

[417] Dynamic Hamiltonian engineering of 2D rectangular lattices in a one-dimensional ion chain F. Rajabi, ..., and R. Islam arXiv: Quantum Physics 2018 - 13 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

0.0

2013

[418] Development of a surface electrode trap for two-dimensional ion lattice U. Tanaka, ..., and S. Urabe 2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEOPR) 2013 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

0.9

2018

[419] A compact radiofrequency drive based on interdependent resonant circuits for precise control of ion traps. Amelia Detti, ..., and C. Sias The Review of scientific instruments 2018 - 5 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

0.0

2018

[420] A miniaturised hybrid ion-atom chip trap and the non-equilibrium statistical mechanics of trapped ions I. Rouse https://doi.org/10.5451/unibas-007057903 2018 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

0.2

2016

[421] Magnetic atom lattices for quantum information J. Naber Journal Not Provided 2016 - 2 citations - Show abstract - Cite 0.5% topic match

0.5%

0.1

2016

[422] Technologies for trapped-ion quantum information systems A. Eltony, ..., and I. Chuang Quantum Information Processing 2016 - 1 citations - Show abstract - Cite 0.5% topic match

0.5%

0.1

2016

[423] Optimisation of the coupling of ion strings to an optical cavity S. Begley Journal Not Provided 2016 - 1 citations - Show abstract - Cite 0.5% topic match

0.5%

0.0

2007

[424] A Point Paul Trap for Quantum Information Experiments R. Clark, ..., and I. Chuang Journal Not Provided 2007 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

0.1

1994

[425] Hot-electron transport in quantum structures N. Mori and C. Hamaguchi Semiconductor Science and Technology 1994 - 3 citations - Show abstract - Cite 0.5% topic match

0.5%

8.9

2012

[426] Quantum simulation of spin models on an arbitrary lattice with trapped ions S. Korenblit, ..., and C. Monroe New Journal of Physics 2012 - 112 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

0.8

2020

[427] Performance Comparison of High Resistivity Silicon, Silicon with Grounding Plane and Glass as Substrate of Ion Trap for Quantum Information Processing P. Zhao, ..., and C. S. Tan 2020 IEEE 8th Electronics System-Integration Technology Conference (ESTC) 2020 - 3 citations - Show abstract - Cite 0.5% topic match

0.5%

0.8

2014

[428] Sympathetic cooling of molecular ions in a surface-electrode ion trap Athar Mokhberi and S. Willitsch Physical Review A 2014 - 8 citations - Show abstract - Cite 0.5% topic match

0.5%

3.0

2008

[429] 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 0.5% topic match

0.5%

0.0

2020

[430] 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 0.5% topic match

0.5%

0.2

2011

[431] 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 0.5% topic match

0.5%

1.0

2015

[432] Quantum transport of energy in controlled synthetic quantum magnets A. Bermudez and T. Schaetz New Journal of Physics 2015 - 9 citations - Show abstract - Cite - PDF 0.5% topic match

0.5%

0.1

2005

[433] 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 0.5% topic match

0.5%

0.0

2011

[434] Ju n 20 11 Many-Body Physics with Trapped Ions Christian Schneider, ..., and T. Schaetz Journal Not Provided 2011 - 0 citations - Show abstract - Cite 0.5% topic match

0.5%

None

[435] Light-induced Gauge Fields for Ultracold Atoms Experimental Quantum Simulations of Many-body Physics with Trapped Ions Preparing Topologically Ordered States by Hamiltonian Interpolation Photon-assisted-tunneling Toolbox for Quantum Simulations in Ion Traps Interaction-dependent Photon-assisted Tunn T. Grass, ..., and Juan José García-Ripoll Journal Not Provided None - 0 citations - Show abstract - Cite 0.5% topic match

0.4%

1.3

2008

[436] Experimental and theoretical challenges for the trapped electron quantum computer I. Marzoli, ..., and A. Walaszyk Journal of Physics B: Atomic, Molecular and Optical Physics 2008 - 21 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.0

2016

[437] Hundreds of ions simulate magnetism J. Stajic Science 2016 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.4

2016

[438] Fast Gates Allow Large-Scale Quantum Simulation with Trapped Ions R. Taylor, ..., and J. Hope arXiv: Quantum Physics 2016 - 3 citations - Show abstract - Cite 0.4% topic match

0.4%

0.1

2003

[439] Quantum theory of heating of a single trapped ion S. Maniscalcoa, ..., and A. Messinaa Journal Not Provided 2003 - 2 citations - Show abstract - Cite Abstract: The heating of trapped ions due to the interaction with a qu ntized environment is studiedwithout performing the Born– Markov approximation . A generalized master equation local in time is derived and a novel theoretical approach to solve it analytically is proposed. Our master equation is in the Lindblad form with time dependent coefficients, thus allowing the simulation of the dynamics by means of the Monte Carlo Wave Function (MCWF) method.  2003 Elsevier Science B.V. All rights reserved. Single ions confined in miniaturized radio frequency traps can be cooled down by means of laser cooling techniques very efficiently [1]. Experiments have shown that the center of mass of a single cooled trapped ion undergoes a quantized harmonic oscillatory motion [2]. During the last decade a great deal of attention has been devoted to such systems since they turn out to be very weakly coupled to external environment, thus allowing the manipulation and observation of the coherent dynamics of a single quantum system [3]. Indeed, by irradiating the ion with properly configured laser beams, it is possible to manipulate the vibronic state of the ion. The easiness to engineer at will the interaction between the motional and internal degrees of freedom of the ion makes it possible to perform experimental tests of fundamental features of quantum mechanics. For example, many non-classical * Corresponding author. E-mail address:sabrina@fisica.unipa.it (S. Maniscalco). states of the oscillatory motion of the ion have been prepared and measured [4]. By using multiple ions in a linear Paul trap, experiments on quantum non-locality have been performed [5] and many-particle entangled states have been realized [6]. Furthermore cold trapped ions have been recently proposed as a physical implementation for quantum computation [7]. Both for fundamental studies and for technological applications it is of great interest to understand and study those factors limiting the fidelity of the operations performed to manipulate coherently the quantum state of the ion. Heating of the center of mass oscillatory motion of one or more trapped ions seems to be one of the major practical sources of decoherence [8]. The process of heating of a single trapped ion is due to the electromagnetic coupling between noisy electric fields and the ion. Such fields give rise to fluctuating forces acting on the ion which can cause an increase in its motional energy. The physical origin of the noisy electric fields in the center of the trap has not yet been unambiguously identified. In fact, measure0375-9601/03/$ – see front matter  2003 Elsevier Science B.V. All rights reserved. doi:10.1016/S0375-9601(02)01778-4 F. Intravaia et al. / Physics Letters A 308 (2003) 6–10 7 ments of the heating rate are very difficult to perform since they require high sensitivity and they may depend on parameters related to the specific trap geometry used [8]. For this reason a general theory of heating would help in identifying and possibly reduce the up to now unknown sources of noise. Most of the theoretical studies on the heating of trapped ions deal with the interaction between a single harmonic oscillator and a reservoir which is either described as a classical stochastic field [9–12] or as an infinite chain of quantum harmonic oscillators. In the first case an analytic solution for the dynamics of the system can be found without performing the Born–Markov approximation [9,11]. In other words, it is possible to study the short time evolution of the heating function when the field noise spectrum is not flat, as it is indeed in any real experimental situation. However, the analytical treatments, in this case, cannot describe the thermalization process, i.e., the long time behavior, since the stochastic field continuously feeds energy in the system, leading to an infinite growth of the heating function. On the other hand, modelling a thermal reservoir as an infinite chain of harmonic oscillators at temperatureT allows, under certain approximations, to describe the dynamics of the system in terms of a master equation of the form [13] 0.4% topic match

0.4%

0.0

2009

[440] Three-Dimensional Array for 40Ca+ Ion Trapping Wan Jin-Yin and Liu Liang Chinese Physics Letters 2009 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.4

2004

[441] 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 0.4% topic match

0.4%

0.9

2015

[442] Universal digital photonic single-qubit quantum channel simulator He Lu, ..., and Jian-Wei Pan arXiv: Quantum Physics 2015 - 8 citations - Show abstract - Cite 0.4% topic match

0.4%

1.0

2018

[443] Modeling near ground-state cooling of two-dimensional ion crystals in a Penning trap using electromagnetically induced transparency Athreya Shankar, ..., and M. Holland Physical Review A 2018 - 6 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.0

2020

[444] Single Ion Addressing Lukas Falko Pernthaler and C. Roos Journal Not Provided 2020 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

4.6

2020

[445] Quantum Ising Hamiltonian Programming in Trio, Quartet, and Sextet Qubit Systems Minhyuk Kim, ..., and Jaewook Ahn PRX Quantum 2020 - 18 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

4.4

2021

[446] 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 0.4% topic match

0.4%

0.0

2002

[447] An ion tunnel ion trap R. Bateman, ..., and S. Pringle Journal Not Provided 2002 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

4.3

2018

[448] Evidence for multiple mechanisms underlying surface electric-field noise in ion traps J. Sedlacek, ..., and J. Chiaverini Physical Review A 2018 - 25 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

1.2

1991

[449] Demonstration of new Paul–Straubel trap for trapping single ions Nan Yu, ..., and H. Dehmelt Journal of Applied Physics 1991 - 41 citations - Show abstract - Cite 0.4% topic match

0.4%

0.8

2023

[450] 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 0.4% topic match

0.4%

0.7

2021

[451] 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%

0.0

2020

[452] Issues using equivalent circuit elements to describe trapped ions N. V. Horne and M. Mukherjee arXiv: Quantum Physics 2020 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

4.3

2012

[453] Single ions trapped in a one-dimensional optical lattice. M. Enderlein, ..., and T. Schaetz Physical review letters 2012 - 51 citations - Show abstract - Cite - PDF 0.4% topic match

0.4%

0.2

2019

[454] An Atomtronic Study of Two-Dimensional Transport in Disordered Waveguides T. Haase Journal Not Provided 2019 - 1 citations - Show abstract - Cite 0.4% topic match

0.4%

0.0

2009

[455] Linear ion trap analyzer 丁力, ..., and 蒋公羽 Journal Not Provided 2009 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.8

2010

[456] Scalable Microchip Ion Traps for Quantum Computation S. Schulz Journal Not Provided 2010 - 11 citations - Show abstract - Cite 0.4% topic match

0.4%

1.2

2005

[457] Proposal for a planar Penning ion trap J. Castrejón-Pita and R. Thompson Physical Review A 2005 - 22 citations - Show abstract - Cite 0.4% topic match

0.4%

18.1

2000

[458] A scalable quantum computer with ions in an array of microtraps J. Cirac and P. Zoller Nature 2000 - 441 citations - Show abstract - Cite 0.4% topic match

0.4%

0.0

2011

[459] Proton traps for multi-nuclear RF coils: design analysis and practical implementation for 13C MRS in humans at 7T M. Meyerspeer, ..., and A. Magill Journal Not Provided 2011 - 0 citations - Show abstract - Cite 0.4% topic match

0.4%

0.1

2013

[460] Viewpoint Two Traps are Better than One A. Bylinskii, ..., and M. Cetina Journal Not Provided 2013 - 1 citations - Show abstract - Cite 0.4% topic match

0.4%

0.3

2010

[461] 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). 0.4% topic match

0.3%

0.0

2014

[462] Building quantum networks with ions in optical cavities T. Northup, ..., and R. Blatt 2014 Conference on Lasers and Electro-Optics (CLEO) - Laser Science to Photonic Applications 2014 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

0.3

2006

[463] 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 0.3% topic match

0.3%

2.9

2021

[464] 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 0.3% topic match

0.3%

0.1

2015

[465] Fused Silica Ion Trap Chip with Efficient Optical Collection System for Timekeeping, Sensing, and Emulation P. Bado, ..., and W. Campbell Journal Not Provided 2015 - 1 citations - Show abstract - Cite 0.3% topic match

0.3%

0.0

2018

[466] 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 0.3% topic match

0.3%

13.8

2010

[467] Optimal energy quanta to current conversion R. S'anchez and M. Buttiker Physical Review B 2010 - 193 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

2.9

2018

[468] 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. 0.3% topic match

0.3%

0.1

2014

[469] Modular Entanglement of Trapped Ion Qubits Using both Phonons and Photons No author found Bulletin of the American Physical Society 2014 - 1 citations - Show abstract - Cite 0.3% topic match

0.3%

0.0

2003

[470] 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 0.3% topic match

0.3%

0.7

2007

[471] Adiabatic information transport in the presence of decoherence I. Kamleitner, ..., and J. Twamley Physical Review A 2007 - 11 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

2.9

2010

[472] 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 0.3% topic match

0.3%

0.8

2009

[473] Feedback-optimized operations with linear ion crystals J. Eble, ..., and K. Singer Journal of The Optical Society of America B-optical Physics 2009 - 11 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2023

[474] High-fidelity spin qubit shuttling via large spin-orbit interaction S. Bosco, ..., and Daniel Loss Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

6.3

2011

[475] Quantum information processing and metrology with trapped ions D. Wineland and D. Leibfried Laser Physics Letters 2011 - 84 citations - Show abstract - Cite 0.3% topic match

0.3%

0.0

2011

[476] 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. 0.3% topic match

0.3%

0.0

2014

[477] Recent progress in quantum simulation with trapped ions J. Freericks Bulletin of the American Physical Society 2014 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

0.9

2011

[478] Many-Body Physics with Trapped Ions Christian Schneider, ..., and T. Schaetz arXiv: Quantum Physics 2011 - 12 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

4.4

2021

[479] High-Stability Cryogenic System for Quantum Computing With Compact Packaged Ion Traps Robert F. Spivey, ..., and Jungsang Kim IEEE Transactions on Quantum Engineering 2021 - 13 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.6

2011

[480] Reduction of anomalous heating in an in-situ-cleaned ion trap D. A. Hite, ..., and D. Wineland https://doi.org/10.1103/PhysRevLett.109.103001 2011 - 7 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.0

2022

[481] Chip integrated photonics for ion based quantum computing Steffen Sauer, ..., and S. Kroker EPJ Web of Conferences 2022 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

1.8

2016

[482] Motional-mode analysis of trapped ions H. Kalis, ..., and T. Schaetz Physical Review A 2016 - 15 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

0.4

2017

[483] 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. 0.3% topic match

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0.0

2009

[484] Three-Dimensional Array for Ca-40(+) Ion Trapping 万金银 and 刘亮 Journal Not Provided 2009 - 0 citations - Show abstract - Cite 0.3% topic match

0.3%

0.5

2020

[485] 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 0.3% topic match

0.3%

2.1

2013

[486] Quantum information processing with trapped ions J. Gaebler Bulletin of the American Physical Society 2013 - 24 citations - Show abstract - Cite 0.3% topic match

0.3%

0.0

2023

[487] 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 0.3% topic match

0.3%

0.7

2023

[488] Time-orbiting-potential chip trap for cold atoms C. Sackett and J. Stickney Physical Review A 2023 - 1 citations - Show abstract - Cite - PDF 0.3% topic match

0.3%

13.1

2021

[489] Toward simulating quantum field theories with controlled phonon-ion dynamics: A hybrid analog-digital approach Z. Davoudi, ..., and G. Pagano Physical Review Research 2021 - 43 citations - Show abstract - Cite - PDF 0.3% topic match

0.2%

0.0

2017

[490] Optical Design for Gaussian Beam Elliptical Spot Shaping Efe Gökmen and M. Marinelli Journal Not Provided 2017 - 0 citations - Show abstract - Cite Abstract: The study of optimisation and modulation of optical fields generated by the laser sources is crucial in quantum information processing (QIP) with trapped ions to obtain more effective cooling mechanisms and to increase the fidelity of the logical gates that are implemented. The current optical setup at the Trapped Ion Quantum Information (TIQI) group has limited ability in addressing long chains of ions with high efficiency in 3D segmented trap experiments. To achieve a more efficient way of addressing chains of ions by generating an elliptical beam spot whose major axis is aligned along the trap axis, an afocal optical system consisting of cylindrical lenses is designed and assembled. The first chapter of this thesis describes the design and presents the results of assessments on the setup. It has been verified that the assembled setup is able to produce two types of focused elliptical beam spots, one with and aspect ratio 2 and the other with 4. Ultimately, this setup is expected to both increase the fidelity in the current protocols and allow future experiments with longer chains of ions which might include quantum simulation of spin systems. The topic of the second chapter of this thesis is the AOM design that is built towards the aim of realising a micro-thermodynamics experiment that is proposed by Prof. R. Renner’s group in ETH. The proposal suggests a prospect of realisation of Szilard’s engine using trapped beryllium and calcium ions. The current setup is able to access all of the relevant transitions suggested in the protocol, except for |S1/2,mJ = −1/2〉 ↔ |D5/2,mJ = −1/2〉 transition in calcium. The required transition frequency for this is achieved by first, locking the 729 nm laser to the lower fringe to reduce the frequency one free spectral range of 1.5 GHz and then, using an 200 MHz AOM in double-pass configuration to increase the frequency by 400 MHz. Decent efficiency in the AOM setup is achieved. Accessing the mentioned calcium transition through the work presented here is an important step towards realising the proposed experiment. 0.2% topic match

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0.0

2017

[491] 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%

1.0

2020

[492] Design and Development of Single-Qubit Ion Trap on Glass and Si Substrates With RF Analysis and Performance Benchmarking A. Apriyana, ..., and C. S. Tan IEEE Transactions on Components, Packaging and Manufacturing Technology 2020 - 4 citations - Show abstract - Cite 0.2% topic match

0.2%

0.3

2021

[493] Heterogenous Integration of Silicon Ion Trap and Glass Interposer for Scalable Quantum Computing Enabled by TSV, Micro-bumps and RDL P. Zhao, ..., and C. S. Tan 2021 IEEE 71st Electronic Components and Technology Conference (ECTC) 2021 - 1 citations - Show abstract - Cite 0.2% topic match

0.2%

4.7

2018

[494] Fast and Scalable Quantum Information Processing with Two‐Electron Atoms in Optical Tweezer Arrays G. Pagano, ..., and M. Foss-Feig Advanced Quantum Technologies 2018 - 28 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.2

2019

[495] High-fidelity quantum logic on trapped ions with microwave radiation A. Lawrence https://doi.org/10.25560/74100 2019 - 1 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

1996

[496] Dark times in the resonance fluorescence of trapped 171Yb ions caused by spontaneous quantum jumps to the 2D3/2 (F = 2) state D. Engelke and Chr. Tamm EPL (Europhysics Letters) 1996 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2010

[497] Entangling a Series of Trapped Ions by Moving Cavity Bus Miao Zhang, ..., and L. F. Wei Chinese Physics Letters 2010 - 0 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.2

2011

[498] 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 0.2% topic match

0.2%

3.3

2009

[499] High-fidelity quantum control using ion crystals in a penning trap M. Biercuk, ..., and J. Bollinger Quantum Inf. Comput. 2009 - 50 citations - Show abstract - Cite - PDF Abstract: We provide an introduction to the use of ion crystals in a Penning trap [1, 2, 3, 4] forexperiments in quantum information. Macroscopic Penning traps allow for the contain-ment of a few to a few million atomic ions whose internal states may be used in quantuminformation experiments. Ions are laser Doppler cooled [1], and the mutual Coulomb re-pulsion of the ions leads to the formation of crystalline arrays [5, 6, 7, 8]. The structureand dimensionality of the resulting ion crystals may be tuned using a combination ofcontrol laser beams and external potentials [9, 10]. We discuss the use of two-dimensional 9Be+ ion crystals for experimental tests ofquantum control techniques. Our primary qubit is the 124 GHz ground-state electronspin flip transition, which we drive using microwaves [11, 12]. An ion crystal representsa spatial ensemble of qubits, but the effects of inhomogeneities across a typical crystalare small, and as such we treat the ensemble as a single effective spin. We are able toinitialize the qubits in a simple state and perform a projective measurement [1] on thesystem. We demonstrate full control of the qubit Bloch vector, performing arbitrary high-fidelity rotations (τπ ∼200 µs). Randomized Benchmarking [13] demonstrates an errorper gate (a Pauli-randomized π=2 and π pulse pair) of 8±1×10-4. Ramsey interferome-try and spin-locking [14] measurements are used to elucidate the limits of qubit coherencein the system, yielding a typical free-induction decay coherence time of T2 ∼2 ms, and alimiting T1ρ ∼688 ms. These experimental specifications make ion crystals in a Penningtrap ideal candidates for novel experiments in quantum control. As such, we brieflydescribe recent efforts aimed at studying the error-suppressing capabilities of dynamicaldecoupling pulse sequences [15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26], demonstratingan ability to extend qubit coherence and suppress phase errors [11, 12]. We concludewith a discussion of future avenues for experimental exploration, including the use of ad-ditional nuclear-spin-flip transitions for effective multiqubit protocols, the potential forhardware refinements to suppress qubit error rates well-below predicted fault-tolerancethresholds, and possibilities for single-ion addressing useful for the realization of complexentangled states. 0.2% topic match

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0.9

2017

[500] Precise positioning of an ion in an integrated Paul trap-cavity system using radiofrequency signals Ezra Kassa, ..., and M. Keller Journal of Modern Optics 2017 - 6 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

9.1

2018

[501] Trapped Ion Quantum Information Processing with Squeezed Phonons. Wenchao Ge, ..., and M. Foss-Feig Physical review letters 2018 - 55 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.1

2009

[502] Fabrication of a segmented micro Penning trap and numerical investigations of versatile ion positioning protocols M. Hellwig, ..., and F. Schmidt-Kaler Journal Not Provided 2009 - 1 citations - Show abstract - Cite 0.2% topic match

0.2%

1.2

2021

[503] Electronic statistics on demand: Bunching, antibunching, positive, and negative correlations in a molecular spin valve N. S. Davis, ..., and D. Kosov Physical Review B 2021 - 4 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

1.4

2013

[504] 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 0.2% topic match

0.2%

0.0

2021

[505] Diffractive Optics for Sensing and Networking with Trapped Ions V. Blūms https://doi.org/10.25904/1912/4072 2021 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2021

[506] Tuning of relative spatial distributions of a two-component ion system to improve sympathetic cooling efficiency L. Du, ..., and Jun Xie Modern Physics Letters B 2021 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2015

[507] Aufbau eines Experimentes zur Speicherung von Yb+ in einer mikrostrukturierten Paul-Falle Thomas Collath Journal Not Provided 2015 - 0 citations - Show abstract - Cite Abstract: An in Paul-Fallen gespeicherten Ionen lassen sich quantenmechanische Effekte untersuchen. Hierzu werden die internen Zustande der Ionen manipuliert und anschliesend durch Fluoreszenzmessungen detektiert. Diese Experimente konnen fur Anwendungen in der Quanteninformationsverarbeitung genutzt werden, Ziele hierbei sind beispielsweise die Simulation von Quantensystemen und die Verwirklichung eines Quantencomputers. Im Rahmen dieser Arbeit wird als Apparatur zum Speichern von Ytterbium-Ionen eine mikrostrukturierte segmentierte Paul-Falle verwendet. Durch den in die Falle integrierten Elektromagneten ist es moglich, die Ionen zu koppeln (Magnetic Gradient Induced Coupling - MAGIC) und mittels Mikrowellenstrahlung zu adressieren. Durch die segmentierten Elektroden konnen die Ionen innerhalb der Falle kontrolliert bewegt werden und es lasst sich deren Wechselwirkung einstellen. Ein mit Dickschichttechnik bedruckter Keramikblock dient als kompakte Vakuumdurchfuhrung der uber siebzig elektrischen Signale, die fur den Betrieb der Falle benotigt werden. Alle weiteren fur die Versuchsapparatur benotigten Komponenten wie der Vakuumrezipient und die Laserstrahlquellen wurden aufgebaut. Fur die Erzeugung von Laserstrahlung bei 369 nm durch Frequenzverdopplung wird erstmals ein Bismuth-Triborat-Kristall genutzt. An den gespeicherten Ionen werden koharente Rabi- und Ramsey-Messungen durchgefuhrt. Durch Messung der Energiedifferenz der einzelnen Zeeman-Niveaus lasst sich das Magnetfeld am Ort des Ions mit einer relativen Unsicherheit von einem ppm bestimmen. Ions trapped in a Paul trap make an ideal system to investigate quantum mechanical effects. To this end the initial states of the ions are manipulated and fluorescence measurements are used for detection. Such experiments have applications in quantum information processing, in particular in the simulation of quantum systems or the realization of a quantum computer. The Paul trap used to trap ytterbium ions in this thesis is a microstructured segmented trap. Electromagnets are integrated into this trap with which individual ions can be coupled to one another (Magnetic Gradient Induced Coupling - MAGIC) and addressed using microwave radiation. Controlled movement of the trapped ions and adjusting the coupling constant between the ions is possible using the segmented electrode structure. A compact vacuum feed through system is realised using a thick film technique printed onto a ceramic block. More than seventy electric signals are used to control the trap using this feed through. Furthermore, the experiment requires a vacuum chamber and laser sources, all of which were constructed and installed during the course of this work. For the first time a bismuth triborate crystal is used for the generation of laser radiation at 369 nm by frequency doubling. First coherent measurements in the form of Rabi and Ramsey measurements are carried out on the trapped ytterbium ions. Measurement of the energy difference between individual Zeeman levels, allow to determine the ions local magnetic field with a relative uncertainty of one ppm. 0.2% topic match

0.2%

67.0

2020

[508] Demonstration of the trapped-ion quantum CCD computer architecture Juan Pino, ..., and B. Neyenhuis Nature 2020 - 295 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2012

[509] Versatile operations with calcium and multi-species ion crystals J. Eble https://doi.org/10.18725/OPARU-1956 2012 - 0 citations - Show abstract - Cite Abstract: Trapped ions represent excellent quantum systems for the experimental realization of quantum information processing and communication (QIPC). In this thesis versatile operations with multi-species ion crystals are presented. Coherence effects in a Λ system of a 40Ca+ ion are investigated. Zeeman sublevels are utilized to evoke electromagnetically induced transparencies. The characteristic dark resonance and line shape alterations are analyzed for varying light field intensities. In order to show the importance of coherent light fields, spectra created with phase-coherent and phase-incoherent EIT light fields are compared. Furthermore, EIT spectroscopy is applied as a sensitive motion sensor for the ion. New features arise by avoiding all coherences in a Λ system. This is achieved by exposing the ion to only one single laser light field, going the spectroscopy. Pulsed light sequences ensure stable cooling and spectroscopy. A quantum mechanical description of the process is given, revealing the dark-resonance-free shape of the spectrum. This enables the determination of the Rabi frequency of the applied laser light field as well as the photon collection efficiency of the imaging system. In many cases in QIPC, it is important to precisely determine the position of the ions, for this information obtained from the ions’ fluorescence is utilized. The capability of the segmented Paul trap to create custom electric potentials is utilized to form timedependent potentials with multiple trapping wells. The application of feedback control allows purposeful movement of a predefined number of ions and position regulation by altering the trapping voltages. Ion transport over 1 mm with more than 99.8% success probability is accomplished without any knowledge of the potentials. By means of the feedback control this allows automated dividing of a linear ion crystal into two distinct potentials as well as the opposite process of merging. In order to perform these experiments, several novel techniques for the operation of an ion trap have been developed. A technique for automatic compensation is introduced to minimize the RF driven micromotion of the ion crystal. Additionally, a precise method for simultaneous measuring the oscillation frequencies for individual ions in an ion crystal is presented. Hereby, the oscillation modes of multi-species ion crystals can be analyzed for the determination of dopant isotopes. 0.2% topic match

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0.1

2013

[510] 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. 0.2% topic match

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0.1

2016

[511] 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 0.2% topic match

0.2%

1.8

1998

[512] Elliptical ion traps and trap arrays for quantum computation R. DeVoe Physical Review A 1998 - 46 citations - Show abstract - Cite 0.2% topic match

0.2%

4.5

2009

[513] 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 0.2% topic match

0.2%

0.0

2002

[514] Cavity-QED with a Single Trapped 40Ca+-ion G. R. Guthöhrlein, ..., and K. Hayasaka https://doi.org/10.1142/9789812778307_0047 2002 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2023

[515] 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 0.2% topic match

0.2%

0.0

2002

[516] First steps toward a multiplexed trapped ion quantum processor Demarco, ..., and Wineland Quantum Electronics and Laser Science Conference 2002 - 1 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2012

[517] Electrostatic Conﬁnement of Charged Particle Beams JOSE D. Weathers and C. Ordonez Journal Not Provided 2012 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

11.4

2023

[518] 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 0.2% topic match

0.2%

0.0

2007

[519] 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 0.2% topic match

0.2%

1.1

2019

[520] First principles simulation of ultracold ion crystals in a Penning trap with Doppler cooling and a rotating wall potential Chenzhi Tang, ..., and S. Parker Physics of Plasmas 2019 - 6 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.0

2021

[521] Low Cost Grounding Integration for Surface Ion Trap Hongyu Li, ..., and C. S. Tan 2021 IEEE 71st Electronic Components and Technology Conference (ECTC) 2021 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2008

[522] On the Global Dynamic Behavior of Trapped Ions in a Thermal Environment M. Bonnin, ..., and M. Gilli 2008 8th IEEE Conference on Nanotechnology 2008 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.1

2016

[523] Integrated Fresnel Mirrors for scalable trapped ion quantum computing E. Streed, ..., and D. Kielpinski 2016 Conference on Lasers and Electro-Optics (CLEO) 2016 - 1 citations - Show abstract - Cite 0.2% topic match

0.2%

1.4

2012

[524] 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 0.2% topic match

0.2%

0.0

2015

[525] Toolbox for Microwave-driven Quantum Logic with Trapped Ions C. Wunderlich, ..., and S. Wölk Journal Not Provided 2015 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

2.0

2020

[526] 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 0.2% topic match

0.2%

3.7

2001

[527] 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 0.2% topic match

0.2%

0.2

2010

[528] A fluorescence study of single trapped Ytterbium ions for quantum information applications S. Ejtemaee Journal Not Provided 2010 - 3 citations - Show abstract - Cite 0.2% topic match

0.2%

3.4

2013

[529] Spatially uniform single-qubit gate operations with near-field microwaves and composite pulse compensation C. Shappert, ..., and A. Harter New Journal of Physics 2013 - 38 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

19.3

2021

[530] Entanglement transport and a nanophotonic interface for atoms in optical tweezers Tamara Ðorđević, ..., and M. Lukin Science 2021 - 62 citations - Show abstract - Cite - PDF 0.2% topic match

0.2%

0.9

2019

[531] 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

2023

[532] Analog-Digital Hybrid Computations with Trapped Ions Norbert M. Linke 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) 2023 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

4.7

2012

[533] 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 0.2% topic match

0.2%

0.0

2011

[534] Entangling a Series of Trapped Ions by Moving Cavity Bus M. Zhang 张, ..., and L. Wei 韦 Chinese Physics Letters 2011 - 0 citations - Show abstract - Cite 0.2% topic match

0.2%

0.0

2023

[535] 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 0.2% topic match

0.2%

1.2

2011

[536] Theory of the coplanar-waveguide Penning trap J. Verdú New Journal of Physics 2011 - 15 citations - Show abstract - Cite 0.2% topic match

0.2%

0.1

2005

[537] Simulation of Quantum Spin Models and Phase Transitions with Trapped Ions D. Porras and J. Cirac Laser Physics 2005 - 2 citations - Show abstract - Cite 0.2% topic match

0.2%

0.8

2015

[538] Modulating carrier and sideband coupling strengths in a standing wave gate beam Thomas E. Delaubenfels, ..., and J. Amini Physical Review A 2015 - 7 citations - Show abstract - Cite - PDF 0.2% topic match

0.1%

0.0

2012

[539] Design of Planar RF Ion Trap Vaibhav Goel Journal Not Provided 2012 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

2.1

2010

[540] Optimized magnetic lattices for ultracold atomic ensembles R. Schmied, ..., and Shannon Whitlock New Journal of Physics 2010 - 29 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.2

2019

[541] Synchronization of atomic quantum systems in multi-site optical trapping potentials M. Schlosser, ..., and G. Birkl arXiv: Quantum Physics 2019 - 1 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

2.8

2013

[542] Entanglement generation using discrete solitons in Coulomb crystals. H. Landa, ..., and Benni Reznik Physical review letters 2013 - 31 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2023

[543] Realization of programmable Ising models in a trapped-ion quantum simulator Yao Lu, ..., and Kihwan Kim Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

1.9

2022

[544] Spatially programmable spin interactions in neutral atom arrays Lea-Marina Steinert, ..., and C. Gross Journal Not Provided 2022 - 5 citations - Show abstract - Cite 0.1% topic match

0.1%

1.7

2012

[545] Quantum magnetism of spin-ladder compounds with trapped-ion crystals Alejandro Bermudez, ..., and M. Plenio New Journal of Physics 2012 - 21 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

37.6

2011

[546] Universal Digital Quantum Simulation with Trapped Ions B. Lanyon, ..., and C. Roos Science 2011 - 485 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2016

[547] Towards an integrated ion trap - cavity system with strong coupling for multiple ions J. Morphew Journal Not Provided 2016 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

2.3

2003

[548] 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 0.1% topic match

0.1%

1.1

2021

[549] Numerical optimization of amplitude-modulated pulses in microwave-driven entanglement generation Markus Duwe, ..., and C. Ospelkaus Quantum Science & Technology 2021 - 3 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2013

[550] Localizing Trapped Ions in an Intracavity Optical Lattice Rasmus B. Linnet, ..., and M. Drewsen Journal Not Provided 2013 - 0 citations - Show abstract - Cite Abstract: For many years, optical lattices have been used to confine ultra-cold neutral atoms in opticalwavelength-scale potentials, while ions are traditionally trapped in electrical potentials of much greater size. In a recent study we showed that it is possible to combine the two techniques to also confine ions on the wavelength-scale [1]. The prospects of such novel trapping conditions are among others quantum simulations of many-body physics [2-4] and examination of the FrenkelKontorova model for friction [5-6]. In the experiments, an optical lattice in the form of a standing-wave field of an optical cavity is applied to Ca ions trapped in a linear Paul trap. The cavity field is tuned to be nearresonant with the D3/2 – P1/2 transition at 866nm in the calcium ion (fig. a). Since subwavelength spatial resolution are extremely challenging using regular optical imaging, we measure the localization effect of the lattice by detecting the spatially dependent fluorescence at 397nm arising from inelastic photon scattering by the lattice itself. In order to quantify the degree of localization, we compare the scattering rates obtained from blue-detuned (ωlattice>ωD3/2-P1/2) and reddetuned (ωlattice<ωD3/2-P1/2) lattices. For the same magnitude of the detuning and cavity field intensity, the lattice potentials are identical in the two cases, while the scattering rates will be significantly different. This happens because a blue-detuned lattice pins the ions at the cavity field nodes (low photon scattering rates), whereas a reddetuned lattice pins the ions at anti-nodes (high photon scattering rates). By this detection method, we have in a single-ion experiment, proven that the lattice induced localization, e.g., can increase the coupling strength of the ion to the cavity field by about 60% compared to a non-localized ion (fig. b). By localizing several ions in the optical lattice at the same time, interesting physical phenomena involving a competition between the lattice potential and inter-ion Coulomb interactions can be studied. 0.1% topic match

0.1%

1.3

2015

[551] Fast and efficient transport of large ion clouds M. Kamsap, ..., and M. Knoop Physical Review A 2015 - 12 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

1.0

2004

[552] Towards a scalable quantum computer/simulator based on trapped ions T. Schaetz, ..., and D. Wineland Applied Physics B 2004 - 19 citations - Show abstract - Cite 0.1% topic match

0.1%

2.2

2023

[553] Programmable quantum simulations on a trapped-ions quantum computer with a global drive Yotam Shapira, ..., and R. Ozeri Journal Not Provided 2023 - 2 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2015

[554] 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 0.1% topic match

0.1%

3.7

2006

[555] 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 0.1% topic match

0.1%

0.0

2014

[556] Simulation and Optimization of Miniature Ring-Endcap Ion Traps J. Cao 曹, ..., and X. Huang 黄 Chinese Physics Letters 2014 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.1

2006

[557] 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 0.1% topic match

0.1%

4.0

2022

[558] Probing Critical Behavior of Long-Range Transverse-Field Ising Model through Quantum Kibble-Zurek Mechanism B.-W. Li, ..., and L. Duan PRX Quantum 2022 - 8 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

4.9

2010

[559] Adiabatic quantum simulators J. Biamonte, ..., and Alán Aspuru-Guzik AIP Advances 2010 - 71 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.6

2021

[560] Creation of double-well potentials in a surface-electrode trap towards a nanofriction model emulator U. Tanaka, ..., and T. E. Mehlstäubler Quantum Science & Technology 2021 - 2 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.2

2005

[561] Entanglement with quantum gates in an optical lattice O. Mandel Journal Not Provided 2005 - 4 citations - Show abstract - Cite Abstract: The concept of a "quantum computer" has attracted much attention in recent years. Many research groups around the world are studying the extraordinary potential of quantum computers and attempting their realisation. Current fundamental experiments are directed towards the individual building blocks of such a computer. The concept of using quantum mechanical systems to calculate complex problems was created in 1982 with Feynmans proposal of the quantum simulator. This concept represents a well controlled framework of interacting quantum systems. The intention is to map a different system of interest not mastered in the lab onto the quantum simulator. From the behaviour of the quantum simulator the behaviour of the system of interest can be deduced. A quantum mechanical measurement on the quantum simulator is thus comparable to one run of a numerical simulation of the system of interest. The difference is that a numerical simulation can often only be run under severe simplifications that then challenge the practical relevance of the result. Only very small quantum systems can be calculated on today's computers without simplifications. In this work a system of ground state atoms stored in a 3D optical lattice is presented. Each of the up to 100,000 atoms is stored in its own potential minimum, isolated from the other atoms. This state is a formidable starting point for the realisation of a quantum simulator: every atom is considered the information carrier of a spin-1/2 system. Only very few of the other concepts currently under investigation have as many information carriers as a Mott-Insulator state in an optical lattice. We have already shown in preparatory experiments a long storage time and good coherence times. Here this system is extended by a major prerequisite for a quantum simulator: controllable interactions between individual atoms are essential in order to model the interaction terms of the system of interest. These interactions are realised by a state-selective in the optical lattice by state-selective trapping potentials. If the states of an atom are called |0> and |1>, then there are two distinct potentials V0 and V1 that each act on only one of the states. The two potentials are shifted with respect to each other and thus allow bringing neighbouring atoms into contact. Since the shifting is always performed along one of the three lattice axes, the interaction is not confined to a single pair of atoms, but all pairs of neighbouring atoms along a lattice axis interact. This inherent parallelism has allowed us to create entanglement in large systems in just a single operation. The entanglement has then been measured in a Ramsey interferometer. A sequence of one nearest-neighbour interaction produces the cluster state, a maximally entangled state. More recent proposals suggest to use a cluster state as the basis for a new kind of quantum computer. As opposed to today's computers, this quantum computer would not be a Touring machine whose working algorithm is only controlled by programming. Instead the wiring of the quantum gates would have to be changed in order to solve a new problem. This is loosely comparable to today's FPGA (Field Programmable Gate Arrays - programmable logic chips). Until these quantum computers are built, quite some improvements on the experimental techniques will be necessary. But the first quantum simulators are now practically within reach. 0.1% topic match

0.1%

1.7

2010

[562] 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 0.1% topic match

0.1%

0.0

2015

[563] Phonon down-conversion in a linear ion trap SHIQIAN DING, GLEB Roland Hablutzel, ..., and Dzmitry Mat Journal Not Provided 2015 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

2.4

2017

[564] 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 0.1% topic match

0.1%

0.1

2015

[565] Tailored Coupled Spin Systems with Microwave-Driven Trapped Ions for Quantum Information Processing C. Piltz, ..., and C. Wunderlich arXiv: Quantum Physics 2015 - 1 citations - Show abstract - Cite 0.1% topic match

0.1%

4.5

2014

[566] Heating rates and ion-motion control in a Y-junction surface-electrode trap Gang Shu, ..., and K. Brown Physical Review A 2014 - 47 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2014

[567] Integrated Diffractive Mirrors (IDM) Ion Traps) C. Volin https://doi.org/10.21236/ada606612 2014 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

6.1

2020

[568] Scalable Cold-Atom Quantum Simulator for Two-Dimensional QED. R. Ott, ..., and J. Berges Physical review letters 2020 - 22 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

12.7

2013

[569] Quantum Simulation of a Lattice Schwinger Model in a Chain of Trapped Ions P. Hauke, ..., and P. Zoller Physical Review X 2013 - 141 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.2

2013

[570] A fibre-based single-photon source A. Riley-Watson Journal Not Provided 2013 - 2 citations - Show abstract - Cite 0.1% topic match

0.1%

3.5

2022

[571] Cryogenic ion trap system for high-fidelity near-field microwave-driven quantum logic M. A. Weber, ..., and D. M. Lucas Quantum Science and Technology 2022 - 7 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

1999

[572] Ion trapping techniques R. Prasad, ..., and A. Menon Current Science 1999 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2010

[573] 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 0.1% topic match

0.1%

0.0

2010

[574] A Simple Scheme for a Two-qubit Conditional Phase Gate in Hot Trapped-ion System Zheng Xiao-juan Journal Not Provided 2010 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.6

2023

[575] 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 0.1% topic match

0.1%

146.7

2019

[576] Trapped-ion quantum computing: Progress and challenges C. Bruzewicz, ..., and J. Sage Applied Physics Reviews 2019 - 778 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

12.9

2007

[577] 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 0.1% topic match

0.1%

1.0

2014

[578] 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 0.1% topic match

0.1%

0.0

2023

[579] 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 0.1% topic match

0.1%

0.1

2017

[580] Integrated Visible Photonics for Trapped-Ion Quantum Computing D. Kharas, ..., and J. Chiaverini Journal Not Provided 2017 - 1 citations - Show abstract - Cite 0.1% topic match

0.1%

0.0

2018

[581] 06 02 00 3 v 1 1 F eb 2 00 6 Scaling and Suppression of Anomalous Quantum Decoherence in Ion Traps L. Deslauriers, ..., and C. Monroe Journal Not Provided 2018 - 0 citations - Show abstract - Cite 0.1% topic match

0.1%

0.4

2011

[582] Quantum Networks with Atoms and Photons C. Monroe, ..., and K. Wright Journal of Physics: Conference Series 2011 - 5 citations - Show abstract - Cite 0.1% topic match

0.1%

0.2

2016

[583] How to couple trapped ions to superconducting resonators: towards hybrid quantum devices S. Moeller Journal Not Provided 2016 - 2 citations - Show abstract - Cite 0.1% topic match

0.1%

1.2

2000

[584] 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 0.1% topic match

0.1%

0.7

2012

[585] 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 0.1% topic match

0.1%

0.0

2023

[586] Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $\lambda\!\phi^4$ model Pablo Vinas Mart'inez, ..., and A. Bermudez Journal Not Provided 2023 - 0 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

5.0

2022

[587] Programmable Quantum Simulations of Bosonic Systems with Trapped Ions. O. Katz and C. Monroe Physical review letters 2022 - 10 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

8.0

2009

[588] Large-scale quantum computation in an anharmonic linear ion trap No author found EPL (Europhysics Letters) 2009 - 125 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2022

[589] 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%

2.0

2013

[590] 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 0.1% topic match

0.1%

1.8

2020

[591] 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 0.1% topic match

0.1%

3.8

2023

[592] 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 0.1% topic match

0.1%

0.2

1995

[593] Linearized dipolar excitation and detection and quadrupolarized axialization in a cylindrical ion cyclotron resonance ion trap S. Guan, ..., and A. Marshall Journal of Mass Spectrometry 1995 - 6 citations - Show abstract - Cite 0.1% topic match

0.1%

39.9

2008

[594] Quantum computing with trapped ions H. Häffner, ..., and R. Blatt Physics Reports 2008 - 632 citations - Show abstract - Cite - PDF 0.1% topic match

0.1%

0.0

2015

[595] Does the Finite Size of Electrons Affect Quantum Noise in Electronic Devices? E. Colomés, ..., and X. Oriols Journal of Physics: Conference Series 2015 - 0 citations - Show abstract - Cite 0.1% topic match

0.0%

0.1

2017

[596] Toward coherent ion-cavity coupling Markus Vogt Journal Not Provided 2017 - 1 citations - Show abstract - Cite 0.0% topic match

0.0%

8.0

2017

[597] Multispecies Trapped-Ion Node for Quantum Networking. I. V. Inlek, ..., and C. Monroe Physical review letters 2017 - 60 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

0.3

2003

[598] Stabilization and control in a linear ion trap J. Stacey Journal Not Provided 2003 - 7 citations - Show abstract - Cite Abstract: This thesis describes experimental work towards developing a trapped ion quantum information processor. An existing ion trap apparatus was capable of trapping and laser-cooling single ions or small ion strings of 40 Ca+, and had been used for studies of quantum jumps and natural lifetime measurements in Ca. This thesis describes improvements in this apparatus, which have allowed the stability and the flexibility of experimental control of the ions to be greatly increased. This enabled experiments to read out the spin state of a single trapped ion, and to load ions with isotope selectivity through photoionization. The optical systems were improved by installation of new lasers, optical reference cavities, and a system of acousto-optic modulators for laser intensity switching and frequency control. The photon counting for fluorescence detection was improved, and a new photon time-of-arrival correlation circuit developed. This has permitted rapid and more sensitive detection of micromotion, and hence cancellation of stray fields in the trap. A study of resonant circuits in the low RF, high voltage (10 MHz, 1 kV) regime was carried out with a view to developing a new RF supply for the Paul trap with reduced noise and increased power. A new supply based on a helical resonator was built and used to trap ions. This technique has reduced noise and will permit higher secular frequencies to be attained in the future. A magnetic field B in the ion trap is used to define a quantization axis, and in one series of experiments was required to be of order 100 G to provide a substantial Zeeman splitting. A set of magnetic field coils to control the size and direction of B is described. The design of these posed some problems owing to an unforseen issue with the vacuum chamber. In short, it is magnetizable and acts to first approximation like a magnetic shield. The field coils had to be sufficiently substantial to produce the desired field at the ion even in the presence of this shielding effect, and dark resonance (and other) spectra with Zeeman splitting were obtained to calibrate the field using the ion as a probe. Finally, the thesis describes the successful loading of the ion trap by laser photoionization from a weak atomic beam. This involved two new lasers at 423 nm and 389 nm. Saturated absorption spectroscopy of neutral calcium is first described, then transverse excitation of an atomic beam in our vacuum chamber is used to identify all the main isotopes of calcium and confirm their abundances in our source (a heated sample of natural calcium). Finally, photoionization is used to load the trap. This has three advantages over electron-impact ionization. By avoiding an electron gun, we avoid charging of insulating patches and subsequent electric field drift as they discharge; the flux in the atomic beam and hence calcium (and other) deposits on the electrodes can be greatly reduced; and most importantly, the photoionization is isotope selective. Evidence is presented which suggests that even with an non-enriched source, the rare isotope 43 Ca can be loaded with reasonable efficiency. This isotope is advantageous for quantum information experiments for several reasons, but chiefly because its ground state hyperfine structure can act as a stable qubit. 0.0% topic match

0.0%

0.2

2014

[599] 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 0.0% topic match

0.0%

2.0

2020

[600] Coherent rotations of qubits within a multi-species ion-trap quantum computer M. Mourik, ..., and R. Blatt Journal Not Provided 2020 - 9 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

0.3

2017

[601] 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 0.0% topic match

0.0%

0.1

2017

[602] 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 0.0% topic match

0.0%

0.8

2021

[603] 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 0.0% topic match

0.0%

0.0

2013

[604] Ion cloud transport between linear RF traps J. Pedregosa-Gutierrez, ..., and M. Knoop Journal Not Provided 2013 - 0 citations - Show abstract - Cite 0.0% topic match

0.0%

6.0

2010

[605] 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 0.0% topic match

0.0%

0.8

2008

[606] 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. 0.0% topic match

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8.2

2011

[607] Simulating open quantum systems: from many-body interactions to stabilizer pumping Markus Müller, ..., and Peter Zoller New Journal of Physics 2011 - 109 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

0.0

2001

[608] 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 0.0% topic match

0.0%

0.0

2013

[609] Quantum simulation with advanced integrated photonics F. Sciarrino and P. Mataloni Spie Newsroom 2013 - 0 citations - Show abstract - Cite Abstract: In spite of the extraordinary progress made in the past decades in the isolation, manipulation, and detection of individual quantum particles, a multi-element quantum computer is still a longterm goal. However, current trends in quantum technology may lead in the next few years to fully controllable quantum devices able to perform specific tasks that are inaccessible to systems operating classically. One task in particular is to reproduce, or simulate, the dynamics of specific quantum phenomena. As first envisaged by Feynman,1 nothing can beat a quantum system in simulating another quantum system. The task would overwhelm a classical system, which would need to store information about every possible combination of states in the target quantum system. A quantum simulator can store this information in a similar set of quantum states, which can be controlled in their preparation, evolution, and measurement. Photonic technologies have a peculiar advantage over other approaches for realizing an efficient quantum simulator, in that photons behave naturally as flying quantum bits (or qubits) over long distances and are practically immune from decoherence. They can also be easily manipulated and individually addressed with high precision by employing simple optical components that do not require cryogenic operation (unlike atomic systems for quantum simulation, which do). Integrated photonic technology has given rise to a new generation of integrated waveguide structures consisting of complex quantum circuits with almost perfect intrinsic phase stability.2 Integrated photonics fabrication provides suitable platforms for quantum communication and computation, solving critical problems of scalability and reliability. In particular, complex arrays of interferometers incorporated on a single integrated platform allow arbitrary interconnections between photon paths. Such systems represent the hardware of a quantum optical simulator, as demonstrated recently with singleand two-photon quantum walk (QW) experiments, in which photons can make Figure 1. Scheme of the integrated interferometric array implementing an eight-step 1D quantum walk (QW) with static disorder used in the Anderson localization experiment.8 The discrete m-axis indicates the different sites (or spatial steps) of the QW, while the discrete n-axis identifies the different time steps. Colored boxes represent phase shifters and different colours indicate different phase shifts. The static disorder corresponds to the phase varying between sites but remaining constant in time along a site. To obtain a totally polarization-independent behaviour, we adopted a 3D geometry for the optical network, which is composed of nearly 60 cascaded beam splitters. 0.0% topic match

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0.1

2016

[610] 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. 0.0% topic match

0.0%

0.0

2011

[611] 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 0.0% topic match

0.0%

0.0

2014

[612] Scalable Multiplexed Ion Trap Fabrication Using Ball Grid Arrays D. Youngner, ..., and A. Harter Journal Not Provided 2014 - 0 citations - Show abstract - Cite 0.0% topic match

0.0%

0.1

2009

[613] Ion trap simulation tools. Benjamin R. Hamlet https://doi.org/10.2172/983695 2009 - 2 citations - Show abstract - Cite 0.0% topic match

0.0%

19.0

2012

[614] 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 0.0% topic match

0.0%

5.9

1989

[615] New ion trap for frequency standard applications J. Prestage, ..., and L. Maleki Journal of Applied Physics 1989 - 205 citations - Show abstract - Cite 0.0% topic match

0.0%

0.4

2011

[616] 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. 0.0% topic match

0.0%

0.0

2006

[617] Scaling and Suppression of Heating in an Adjustable Ion Trap No author found Bulletin of the American Physical Society 2006 - 0 citations - Show abstract - Cite 0.0% topic match

0.0%

5.9

2018

[618] Chip-Integrated Voltage Sources for Control of Trapped Ions J. Stuart, ..., and J. Chiaverini Physical Review Applied 2018 - 34 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

0.0

2010

[619] 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 0.0% topic match

0.0%

0.9

2023

[620] Sideband Thermometry of Ion Crystals I. Vybornyi, ..., and K. Hammerer PRX Quantum 2023 - 1 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

1.8

2020

[621] Broadening of the drumhead-mode spectrum due to in-plane thermal fluctuations of two-dimensional trapped ion crystals in a Penning trap Athreya Shankar, ..., and J. Bollinger arXiv: Quantum Physics 2020 - 7 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

4.4

2021

[622] 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 0.0% topic match

0.0%

0.0

2023

[623] Влияние внешнего переменного электрического поля на эффективность сверхпроводникового однофотонного детектора Г. М. Чулкова, ..., and И. И. Галанин Журнал технической физики 2023 - 0 citations - Show abstract - Cite 0.0% topic match

0.0%

0.1

2013

[624] QUANTUM SIMULATIONS OF THE ISING MODEL WITH TRAPPED IONS: DEVIL'S STAIRCASE AND ARBITRARY LATTICE PROPOSAL S. Korenblit Journal Not Provided 2013 - 1 citations - Show abstract - Cite Abstract: Title of dissertation: QUANTUM SIMULATIONS OF THE ISING MODEL WITH TRAPPED IONS: DEVIL’S STAIRCASE AND ARBITRARY LATTICE PROPOSAL Simcha Korenblit, Doctor of Philosophy 2013 Dissertation directed by: Professor Christopher Monroe Joint Quantum Institute University of Maryland Department of Physics and National Institute of Standards and Technology A collection of trapped atomic ions represents one of the most attractive platforms for the quantum simulation of interacting spin networks and quantum magnetism. Spin-dependent optical dipole forces applied to an ion crystal create longrange effective spin-spin interactions and allow the simulation of spin Hamiltonians that possess nontrivial phases and dynamics. We trap linear chains of 171Yb ions [1] in a Paul trap [2], and constrain the occupation of energy levels to the ground hyperfine clock-states, creating a qubit or pseudo-spin 1/2 system. We proceed to implement spin-spin couplings between two ions using the far detuned Mølmer-Sørenson scheme[3] and perform adiabatic quantum simulations of Ising Hamiltonians with long-range couplings. We then demonstrate our ability to control the sign and relative strength of the interaction between three ions. Using this control, we simulate a frustrated triangular lattice, and for the first time establish an experimental connection between frustration and quantum entanglement. We then scale up our simulation to show phase transitions from paramagnetism to ferromagnetism for nine ions, and to anti-ferromagnetism for sixteen ions. The experimental work culminates with our most complicated Hamiltonian a long range anti-ferromagnetic Ising interaction between 10 ions with a biasing axial field, which I have led. Theoretical work presented in this thesis shows how the approach to quantum simulation utilized in this thesis can be further extended and improved. It is shown how appropriate design of laser fields can provide for arbitrary multidimensional spin-spin interaction graphs even for the case of a linear spatial array of ions. This scheme uses currently existing trap technology and is scalable to levels where classical methods of simulation are intractable. QUANTUM SIMULATIONS OF THE ISING MODEL WITH TRAPPED IONS: DEVIL’S STAIRCASE AND ARBITRARY LATTICE PROPOSAL 0.0% topic match

0.0%

4.9

2017

[625] 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 0.0% topic match

0.0%

7.4

2002

[626] 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 0.0% topic match

0.0%

0.0

2012

[627] 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 0.0% topic match

0.0%

0.6

2013

[628] Ab initio characterization of the quantum linear-zigzag transition using density matrix renormalization group calculations P. Silvi, ..., and S. Montangero Physical Review B 2013 - 6 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

3.7

2012

[629] Modes of oscillation in radiofrequency Paul traps H. Landa, ..., and A. Retzker New Journal of Physics 2012 - 45 citations - Show abstract - Cite - PDF 0.0% topic match

0.0%

0.1

2009

[630] Three-Dimensional Array for 40Ca+ Ion Trapping J. Wan and Liu Liang Chinese Physics Letters 2009 - 2 citations - Show abstract - Cite 0.0% topic match

0.0%

3.0

2011

[631] Coaxial ion trap mass spectrometer: concentric toroidal and quadrupolar trapping regions. Ying Peng, ..., and D. Austin Analytical chemistry 2011 - 39 citations - Show abstract - Cite 0.0% topic match

0.0%

0.4

2012

[632] 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. 0.0% topic match

0.0%

0.0

2020

[633] Design and fabrication of ion traps for a scalable microwave quantum computer Weikang Fan Journal Not Provided 2020 - 0 citations - Show abstract - Cite 0.0% topic match

0.0%

4.4

2014

[634] How far can ion trap miniaturization go? Parameter scaling and space-charge limits for very small cylindrical ion traps. Yuan Tian, ..., and D. Austin Journal of mass spectrometry : JMS 2014 - 46 citations - Show abstract - Cite 0.0% topic match

0.0%

0.7

2006

[635] Advanced ion trap development and ultrafast laser-ion interactions. M. Madsen Journal Not Provided 2006 - 13 citations - Show abstract - Cite 0.0% topic match

0.0%

0.3

2010

[636] 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 0.0% topic match

0.0%

0.0

2020

[637] 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 0.0% topic match

0.0%

0.5

2022

[638] 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 0.0% topic match

0.0%

0.0

2023

[639] 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 0.0% topic match

0.0%

0.0

2004

[640] 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 0.0% topic match

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