Universal quantum computation using all-optical hybrid encoding

doi:10.1088/1674-1056/24/4/040303

›› 2015, Vol. 24 ›› Issue (4): 40303-040303.doi: 10.1088/1674-1056/24/4/040303

Universal quantum computation using all-optical hybrid encoding

郭奇^{a b}, 程留永^a, 王洪福^b, 张寿^{a b}

a Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
b Department of Physics, College of Science, Yanbian University, Yanji 133002, China

收稿日期:2014-07-29 修回日期:2014-11-16 出版日期:2015-04-05 发布日期:2015-04-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61465013, 11465020, and 11264042).

Universal quantum computation using all-optical hybrid encoding

Guo Qi (郭奇)^{a b}, Cheng Liu-Yong (程留永)^a, Wang Hong-Fu (王洪福)^b, Zhang Shou (张寿)^{a b}

a Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
b Department of Physics, College of Science, Yanbian University, Yanji 133002, China

Received:2014-07-29 Revised:2014-11-16 Online:2015-04-05 Published:2015-04-05
Contact: Zhang Shou E-mail:szhang@ybu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61465013, 11465020, and 11264042).

摘要/Abstract

摘要： By employing displacement operations, single-photon subtractions, and weak cross-Kerr nonlinearity, we propose an alternative way of implementing several universal quantum logical gates for all-optical hybrid qubits encoded in both single-photon polarization state and coherent state. Since these schemes can be straightforwardly implemented only using local operations without teleportation procedure, therefore, less physical resources and simpler operations are required than the existing schemes. With the help of displacement operations, a large phase shift of the coherent state can be obtained via currently available tiny cross-Kerr nonlinearity. Thus, all of these schemes are nearly deterministic and feasible under current technology conditions, which makes them suitable for large-scale quantum computing.

关键词: quantum computation, linear optics, cross-Kerr nonlinearities

Abstract: By employing displacement operations, single-photon subtractions, and weak cross-Kerr nonlinearity, we propose an alternative way of implementing several universal quantum logical gates for all-optical hybrid qubits encoded in both single-photon polarization state and coherent state. Since these schemes can be straightforwardly implemented only using local operations without teleportation procedure, therefore, less physical resources and simpler operations are required than the existing schemes. With the help of displacement operations, a large phase shift of the coherent state can be obtained via currently available tiny cross-Kerr nonlinearity. Thus, all of these schemes are nearly deterministic and feasible under current technology conditions, which makes them suitable for large-scale quantum computing.

Key words: quantum computation, linear optics, cross-Kerr nonlinearities

中图分类号: (Quantum information)

03.67.-a

03.67.Lx (Quantum computation architectures and implementations) 42.50.Ex (Optical implementations of quantum information processing and transfer)

郭奇, 程留永, 王洪福, 张寿. Universal quantum computation using all-optical hybrid encoding[J]. , 2015, 24(4): 40303-040303.

Guo Qi (郭奇), Cheng Liu-Yong (程留永), Wang Hong-Fu (王洪福), Zhang Shou (张寿). Universal quantum computation using all-optical hybrid encoding[J]. Chin. Phys. B, 2015, 24(4): 40303-040303.

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Universal quantum computation using all-optical hybrid encoding

Universal quantum computation using all-optical hybrid encoding

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