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

doi:10.1088/1674-1056/ab6654

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.

Keywords: quantum random walk decoherence random walk

Received: 10 October 2019
Revised: 28 November 2019
Accepted manuscript online:

PACS:	05.40.Fb	(Random walks and Levy flights)
	05.40.-a	(Fluctuation phenomena, random processes, noise, and Brownian motion)
	03.65.Yz	(Decoherence; open systems; quantum statistical methods)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61701139).

Corresponding Authors: Zijing Zhang
E-mail: zhangzijing@hit.edu.cn

Cite this article:

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 2020 Chin. Phys. B 29 020503

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

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