The effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk

doi:10.1088/1674-1056/ab6654

中国物理B ›› 2020, Vol. 29 ›› Issue (2): 20503-020503.doi: 10.1088/1674-1056/ab6654

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

The effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk

Zijing Zhang(张子静), Feng Wang(王峰), Jie Song(宋杰), Yuan Zhao(赵远)

1 Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
2 Tianjin Jinhang Institute of Physical Technique, Tianjin 300192, China

收稿日期:2019-10-10 修回日期:2019-11-28 出版日期:2020-02-05 发布日期:2020-02-05
通讯作者: Zijing Zhang E-mail:zhangzijing@hit.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61701139).

The effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk

Zijing Zhang(张子静)¹, Feng Wang(王峰)², Jie Song(宋杰)¹, Yuan Zhao(赵远)¹

1 Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
2 Tianjin Jinhang Institute of Physical Technique, Tianjin 300192, China

Received:2019-10-10 Revised:2019-11-28 Online:2020-02-05 Published:2020-02-05
Contact: Zijing Zhang E-mail:zhangzijing@hit.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61701139).

摘要/Abstract

摘要： In the optical quantum random walk system, phase fluctuation and beam splitter fluctuation are two unavoidable decoherence factors. These two factors degrade the performance of quantum random walk by destroying coherence, and even degrade it into a classical one. We propose a scheme for the simulation of quantum random walk using phase shifters, tunable beam splitters, and photodetectors. This proposed scheme enables us to analyze the effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk. Furthermore, it is helpful to guide the control of phase fluctuation and beam splitter fluctuation in the experiment.

关键词: quantum random walk, decoherence, random walk

Abstract: In the optical quantum random walk system, phase fluctuation and beam splitter fluctuation are two unavoidable decoherence factors. These two factors degrade the performance of quantum random walk by destroying coherence, and even degrade it into a classical one. We propose a scheme for the simulation of quantum random walk using phase shifters, tunable beam splitters, and photodetectors. This proposed scheme enables us to analyze the effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk. Furthermore, it is helpful to guide the control of phase fluctuation and beam splitter fluctuation in the experiment.

Key words: quantum random walk, decoherence, random walk

中图分类号: (Random walks and Levy flights)

05.40.Fb

05.40.-a (Fluctuation phenomena, random processes, noise, and Brownian motion) 03.65.Yz (Decoherence; open systems; quantum statistical methods)

张子静, 王峰, 宋杰, 赵远. The effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk[J]. 中国物理B, 2020, 29(2): 20503-020503.

Zijing Zhang(张子静), Feng Wang(王峰), Jie Song(宋杰), Yuan Zhao(赵远). The effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk[J]. Chin. Phys. B, 2020, 29(2): 20503-020503.

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The effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk

The effect of phase fluctuation and beam splitter fluctuation on two-photon quantum random walk

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