Article
Physics, Multidisciplinary
Bikun Li, Fernando A. Calderon-Vargas, Junkai Zeng, Edwin Barnes
Summary: This study introduces a protocol to design bounded and continuous control fields to implement arbitrary single-axis rotations while shielding the system from low-frequency time-dependent noise. The method shows versatility by using non-negative control pulses, immediately applicable to quantum systems with constrained control. The control pulses are demonstrated to be robust against classical 1/f noise and noise modeled with a random quantum bath, even outperforming ideal dynamical decoupling sequences.
NEW JOURNAL OF PHYSICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Hasan Hakan Genc, Serkan Aydin, Hasan Erdal
Summary: The emergence of real quantum computers has led to rapid growth in the field of quantum computing across various disciplines. Programming quantum computers is similar to programming classical computers in the early stages, with quantum gates being the most widely used model. A VR-based teaching platform named QU-VR Education Tool was designed to provide an easy and practical understanding of quantum gate behavior in programming quantum computers.
COMPUTER APPLICATIONS IN ENGINEERING EDUCATION
(2022)
Article
Computer Science, Theory & Methods
Zachary Stier
Summary: The algorithm developed by Parzanchevski-Sarnak adapts Ross-Selinger's method to efficiently factorize PU(2)-diagonal elements within a distance epsilon, extending it to any PU(2)-element. By leveraging Carvalho Pinto-Petit's recent work, the algorithm has been further improved and implemented in Haskell, with the use of certain well-chosen sets of factors.
QUANTUM INFORMATION & COMPUTATION
(2021)
Editorial Material
Quantum Science & Technology
Xiaoqin Gao, Paul Appel, Nicolai Friis, Martin Ringbauer, Marcus Huber
Summary: Gate-based universal quantum computation involves two types of operations: local single-qubit gates and two-qubit entangling gates. The complexity of multi-qubit circuits can be lowered by using higher-dimensional systems for encoding. We discuss the principles of circuit compression, derive bounds on the achievable advantage, and provide experimental schemes to demonstrate improved circuit performance.
Article
Physics, Multidisciplinary
Wengang Zhang, Xiaolong Ouyang, Xianzhi Huang, Xin Wang, Huili Zhang, Yefei Yu, Xiuying Chang, Yanqing Liu, Dong-Ling Deng, L. -M. Duan
Summary: This study implements a non-Hermitian topological phase model and investigates it using a solid-state quantum simulator, demonstrating both integer and fractional winding numbers. The non-Hermitian topological phase with a fractional winding number is intrinsic to non-Hermitian systems and cannot be continuously deformed into any Hermitian topological phase.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yotam Shapira, Sapir Cohen, Nitzan Akerman, Ady Stern, Roee Ozeri
Summary: In this study, we enhance the fidelity and robustness of entangling gates in quantum computers by introducing spin-dependent squeezing.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Patrick Barthel, Patrick H. Huber, Jorge Casanova, Inigo Arrazola, Dorna Niroomand, Theeraphot Sriarunothai, Martin B. Plenio, Christof Wunderlich
Summary: We demonstrate the experimental implementation of a two-qubit phase gate using a radio frequency controlled trapped-ion quantum processor. The gate is generated by applying a pulsed dynamical decoupling sequence to the ions' carrier transitions, allowing for tunable and high-fidelity phase shift. The gate's performance is robust against various sources of error and holds potential for fast gate speeds.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Seokho Jeong, Xiao-Feng Shi, Minhyuk Kim, Jaewook Ahn
Summary: Rydberg atom arrays are useful for various quantum applications. In this study, researchers propose an all-optical gate-based quantum computing scheme using auxiliary atoms for remote couplings and optical addressing for constructing universal quantum gates. They also provide a detailed resource estimate for implementing this scheme in a Rydberg quantum simulator.
FRONTIERS IN PHYSICS
(2022)
Article
Quantum Science & Technology
Jinyoung Ha, Jonghyun Lee, Jun Heo
Summary: This study decomposes two implementations of Shor's algorithm for prime factorization into universal gate units at the logical level and predicts the number of physical qubits and execution time when surface codes are used. Assuming logical qubit encoding using a rotated surface code and logical qubits with all-to-all connectivity, the number of physical qubits and execution time are expressed in terms of the bit length of the number to be factorized and error rate of the physical quantum gate. By analyzing two algorithms with different bit lengths and physical gate error rates, the relationship between the number of qubits and the execution time is confirmed.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Quantum Science & Technology
F. Holik, M. Losada, H. Freytes, A. Plastino, G. Sergioli
Summary: In this study, the notion of partial orbits for a given set of elementary quantum gates is introduced, and the entanglement of resulting quantum states is analyzed by the violation of Svetlichny inequality. It is found that the violation values are concentrated on specific regions, providing evidence for the existence of a structure distinct from randomly generated sets of gates. This emphasizes the importance of studying the physical properties of partial orbits associated with different sets of elementary gates.
QUANTUM INFORMATION PROCESSING
(2021)
Review
Computer Science, Information Systems
Yan Liang, Pu Shen, Tao Chen, Zheng-Yuan Xue
Summary: The geometric phase has the advantage of being resistant to certain local noises due to its reliance on global properties of the evolution path. Additionally, the non-Abelian geometric phase in matrix form can be used for high-performance quantum gates, known as holonomic quantum computation. This article reviews recent advancements in nonadiabatic holonomic quantum computation, focusing on optimal control approaches to enhance gate performance in terms of fidelity and robustness. The possibilities and concrete examples of physical realizations are also discussed. Ultimately, state-of-the-art technology allows implemented holonomic quantum gates to outperform conventional dynamical ones under certain conditions.
SCIENCE CHINA-INFORMATION SCIENCES
(2023)
Article
Physics, Multidisciplinary
Wei Li
Summary: This paper presents a new method for quantum computation using nonadiabatic geometric phase, which can achieve a universal set of one-qubit gates while considering the influence of systematic error and dissipation on the computing process. Additionally, it designs an arbitrary controlled-U gate using a driven system composed of a pair of coupled spin subsystems to complete the universal set.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Yuanye Zhu, Zeguo Wang, Bao Yan, Shijie Wei
Summary: The quantum search algorithm is a milestone in quantum algorithms, showing quadratic speed-up compared to classical algorithms when searching marked states in an unsorted database, but sensitivity to the number of marked states. This paper studies the relationship between success rate and number of iterations, proposing a robust quantum search algorithm with uncertainty in the number of marked states, maintaining the same query complexity as Grover's algorithm and high tolerance for uncertainty. Specifically, for databases with uncertainty in the M/N ratio, the algorithm achieves a success rate of no less than 96% in finding target states.
Article
Computer Science, Artificial Intelligence
Maria Mannone, Valeria Seidita, Antonio Chella
Summary: This study applies quantum computing to swarm robotics and develops a model using quantum circuits to capture the relationship between local and global behavior. By choosing the foraging behavior of ants as an example, the effectiveness of this model is tested. This research is significant in uncovering the potential of quantum computing in swarm robotics.
SWARM AND EVOLUTIONARY COMPUTATION
(2023)
Article
Physics, Applied
Luqing Qiu, Hao Li, Zhikun Han, Wen Zheng, Xiaopei Yang, Yuqian Dong, Shuqing Song, Dong Lan, Xinsheng Tan, Yang Yu
Summary: In this study, noncyclic geometric gates were experimentally realized, showing that smaller rotation angles correspond to shorter evolution time and higher fidelity. The superiority of noncyclic geometric gates in terms of faster and more robust quantum computation makes them promising candidates for practical applications.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Joseph F. Fitzsimons, Jonathan A. Jones, Vlatko Vedral
SCIENTIFIC REPORTS
(2015)
Article
Engineering, Electrical & Electronic
Minaru Kawamura, Jonathan A. Jones
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2017)
Article
Physics, Multidisciplinary
Gaurav Bhole, Jonathan A. Jones
FRONTIERS OF PHYSICS
(2018)
Article
Optics
Alexander Dunning, Rachel Gregory, James Bateman, Nathan Cooper, Matthew Himsworth, Jonathan A. Jones, Tim Freegarde
Article
Physics, Multidisciplinary
G. Brassard, Y. Elias, J. M. Fernandez, H. Gilboa, J. A. Jones, T. Mor, Y. Weinstein, L. Xiao
EUROPEAN PHYSICAL JOURNAL PLUS
(2014)
Article
Optics
J. F. F. Bulmer, J. A. Jones, I. A. Walmsley
Article
Physics, Applied
Gaurav Bhole, Takahiro Tsunoda, Peter J. Leek, Jonathan A. Jones
PHYSICAL REVIEW APPLIED
(2020)
Article
Physics, Multidisciplinary
C. Greganti, T. F. Demarie, M. Ringbauer, J. A. Jones, V Saggio, I. Alonso Calafell, L. A. Rozema, A. Erhard, M. Meth, L. Postler, R. Stricker, P. Schindler, R. Blatt, T. Monz, P. Walther, J. F. Fitzsimons
Summary: The study introduces a cross-verification technique that utilizes the principles of quantum computation for checking the results of quantum computers. Through consistency checks of different quantum circuits, the technique enables verification of quantum computations between independent devices and within a single device.
Article
Optics
Maria Violaris, Gaurav Bhole, Jonathan A. Jones, Vlatko Vedral, Chiara Marletto
Summary: An implementation of a finite quantum homogenizer using nuclear magnetic resonance (NMR) with a four-qubit system is presented. Experimental results are consistent with the theoretical symmetry in qubit state evolution, revealing the physical significance of the homogenizer for pure state preparation and information scrambling.
Article
Optics
Takahiro Tsunoda, Gaurav Bhole, Stephen A. Jones, Jonathan A. Jones, Peter J. Leek
Article
Optics
Michael Hughes, Matthew D. Frye, Rahul Sawant, Gaurav Bhole, Jonathan A. Jones, Simon L. Cornish, M. R. Tarbutt, Jeremy M. Hutson, Dieter Jaksch, Jordi Mur-Petit
Article
Physics, Multidisciplinary
G. Bhole, J. A. Jones, C. Marletto, V. Vedral
JOURNAL OF PHYSICS COMMUNICATIONS
(2020)
Article
Political Science
Ruth M. Dixon, Jonathan A. Jones
PARLIAMENTARY AFFAIRS
(2019)
Article
Psychology, Multidisciplinary
Ruth M. Dixon, Jonathan A. Jones
PSYCHOLOGICAL SCIENCE
(2015)