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

被引：4
|
作者：
Zhang, Zijing [1 ]
Wang, Feng [2 ]
Song, Jie [1 ]
Zhao, Yuan [1 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China
[2] Tianjin Jinhang Inst Phys Tech, Tianjin 300192, Peoples R China
来源：
CHINESE PHYSICS B | 2020年 / 29卷 / 02期
基金：
中国国家自然科学基金;
关键词：
quantum random walk; decoherence; random walk; DECOHERENCE;
D O I：
10.1088/1674-1056/ab6654
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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.
引用
收藏
页数：6
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