Results 1 to 10 of about 2,063,385 (366)

Nonlocal photonic quantum gates over 7.0 km [PDF]

Nature Communications, 2023
Quantum networks provide a prospective paradigm to connect separated quantum nodes, which relies on the distribution of long-distance entanglement and active feedforward control of qubits between remote nodes. Such approaches can be utilized to construct
Xiao Liu, Xiao-Min Hu, Tian-Xiang Zhu, Chao Zhang, Yi-Xin Xiao, Jia-Le Miao, Zhong-Wen Ou, Pei-Yun Li, Bi-Heng Liu, Zong-Quan Zhou, Chuan-Feng Li, Guang-Can Guo   +11 more
doaj   +4 more sources

The experimental realization of high-fidelity ‘shortcut-to-adiabaticity’ quantum gates in a superconducting Xmon qubit [PDF]

New Journal of Physics, 2018
Based on a ‘shortcut-to-adiabaticity’ (STA) scheme, we theoretically design and experimentally realize a set of high-fidelity single-qubit quantum gates in a superconducting Xmon qubit system.
Tenghui Wang, Zhenxing Zhang, Liang Xiang, Zhilong Jia, Peng Duan, Weizhou Cai, Zhihao Gong, Zhiwen Zong, Mengmeng Wu, Jianlan Wu, Luyan Sun, Yi Yin, Guoping Guo   +12 more
doaj   +3 more sources

Optimizing quantum gates towards the scale of logical qubits. [PDF]

Nat Commun, 2023
A foundational assumption of quantum error correction theory is that quantum gates can be scaled to large processors without exceeding the error-threshold for fault tolerance.
Klimov PV, Bengtsson A, Quintana C, Bourassa A, Hong S, Dunsworth A, Satzinger KJ, Livingston WP, Sivak V, Niu MY, Andersen TI, Zhang Y, Chik D, Chen Z, Neill C, Erickson C, Grajales Dau A, Megrant A, Roushan P, Korotkov AN, Kelly J, Smelyanskiy V, Chen Y, Neven H.   +23 more
europepmc   +3 more sources

Elementary gates for quantum computation [PDF]

Physical Review A. Atomic, Molecular, and Optical Physics, 1995
We show that a set of gates that consists of all one-bit quantum gates (U(2)) and the two-bit exclusive-or gate (that maps Boolean values $(x,y)$ to $(x,x \oplus y)$) is universal in the sense that all unitary operations on arbitrarily many bits $n$ (U ...
A. C. C. Yao, A. Peres, Adriano Barenco, B. Schumacher, C. H. Bennett, C. H. Bennett, Charles H. Bennett, D. Coppersmith, D. Deutsch, D. Deutsch, D. Deutsch, D. P. DiVincenzo, D. P. DiVincenzo, David P. DiVincenzo, E. Fredkin, G. Brassard, G. J. Milburn, Harald Weinfurter, John A. Smolin, M. Reck, Michael Ben Or, N. Margolus, Norman Margolus, P. Benioff, P. W. Shor, Peter Shor, R. Jozsa, R. Landauer, R. P. Feynman, Richard Cleve, S. Lloyd, S. Lloyd, Tycho Sleator, W. G. Unruh   +33 more
core   +12 more sources

Error-mitigated quantum gates exceeding physical fidelities in a trapped-ion system. [PDF]

Nat Commun, 2020
Various quantum applications can be reduced to estimating expectation values, which are inevitably deviated by operational and environmental errors. Although errors can be tackled by quantum error correction, the overheads are far from being affordable ...
Zhang S, Lu Y, Zhang K, Chen W, Li Y, Zhang JN, Kim K.   +6 more
europepmc   +3 more sources

Quantum Fredkin and Toffoli gates on a versatile programmable silicon photonic chip

npj Quantum Information, 2022
Quantum logic gates are backbones of quantum information processing (QIP), wherein the typical three-qubit Fredkin and Toffoli gates are essential in quantum computation and communication.
Yuan Li, Lingxiao Wan, Hui Zhang, Huihui Zhu, Yuzhi Shi, Lip Ket Chin, Xiaoqi Zhou, Leong Chuan Kwek, Ai Qun Liu   +8 more
doaj   +2 more sources

Experimental realization of nonadiabatic holonomic single‐qubit quantum gates with two dark paths in a trapped ion [PDF]

Fundamental Research, 2022
For circuit-based quantum computation, experimental implementation of a universal set of quantum logic gates with high-fidelity and strong robustness is essential and central.
Ming-Zhong Ai, Sai Li, Ran He, Zheng-Yuan Xue, Jin-Ming Cui, Yun-Feng Huang, Chuan-Feng Li, Guang-Can Guo   +7 more
doaj   +2 more sources

Benchmarking universal quantum gates via channel spectrum [PDF]

Nature Communications, 2023
Noise remains the major obstacle to scalable quantum computation. Quantum benchmarking provides key information on noise properties and is an important step for developing more advanced quantum processors. However, current benchmarking methods are either
Yanwu Gu, Wei-Feng Zhuang, Xudan Chai, Dong E. Liu   +3 more
doaj   +2 more sources

Single-Loop Realization of Arbitrary Nonadiabatic Holonomic Single-Qubit Quantum Gates in a Superconducting Circuit. [PDF]

Physical Review Letters, 2018
Geometric phases are noise resilient, and thus provide a robust way towards high-fidelity quantum manipulation. Here we experimentally demonstrate arbitrary nonadiabatic holonomic single-qubit quantum gates for both a superconducting transmon qubit and a
Yuan Xu, W. Cai, Y. Ma, X. Mu, Linhua Hu, Tao Chen, Hao Wang, Yipu Song, Z. Xue, Z. Yin, Luyan Sun   +10 more
semanticscholar   +3 more sources

Ultrahigh-fidelity spatial mode quantum gates in high-dimensional space by diffractive deep neural networks [PDF]

Light: Science & Applications
While the spatial mode of photons is widely used in quantum cryptography, its potential for quantum computation remains largely unexplored. Here, we showcase the use of the multi-dimensional spatial mode of photons to construct a series of high ...
Qianke Wang, Jun Liu, Dawei Lyu, Jian Wang   +3 more
doaj   +2 more sources