Disorder in parity-time symmetric quantum walks

doi:10.1088/1674-1056/ac3741

中国物理B ›› 2022, Vol. 31 ›› Issue (1): 10311-010311.doi: 10.1088/1674-1056/ac3741

所属专题： SPECIAL TOPIC — Non-Hermitian physics

Disorder in parity-time symmetric quantum walks

Peng Xue(薛鹏)^†

Beijing Computational Science Research Center, Beijing 100084, China

收稿日期:2021-10-02 修回日期:2021-11-04 接受日期:2021-11-06 出版日期:2021-12-03 发布日期:2021-12-23
通讯作者: Peng Xue E-mail:genp.eux@gmail.com
基金资助:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12025401 and U1930402).

Disorder in parity-time symmetric quantum walks

Peng Xue(薛鹏)^†

Beijing Computational Science Research Center, Beijing 100084, China

Received:2021-10-02 Revised:2021-11-04 Accepted:2021-11-06 Online:2021-12-03 Published:2021-12-23
Contact: Peng Xue E-mail:genp.eux@gmail.com
Supported by:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12025401 and U1930402).

摘要/Abstract

摘要： We experimentally investigate the impact of static disorder and dynamic disorder on the non-unitary dynamics of parity-time (PT)-symmetric quantum walks. Via temporally alternating photon losses in an interferometric network, we realize the passive PT-symmetric quantum dynamics for single photons. Controllable coin operations allow us to simulate different environmental influences, which result in three different behaviors of quantum walkers: a standard ballistic spread, a diffusive behavior, and a localization, respectively, in a PT-symmetric quantum walk architecture.

关键词: parity-time symmetry, quantum walks, disorder

Abstract: We experimentally investigate the impact of static disorder and dynamic disorder on the non-unitary dynamics of parity-time (PT)-symmetric quantum walks. Via temporally alternating photon losses in an interferometric network, we realize the passive PT-symmetric quantum dynamics for single photons. Controllable coin operations allow us to simulate different environmental influences, which result in three different behaviors of quantum walkers: a standard ballistic spread, a diffusive behavior, and a localization, respectively, in a PT-symmetric quantum walk architecture.

Key words: parity-time symmetry, quantum walks, disorder

中图分类号: (Quantum computation architectures and implementations)

03.67.Lx

03.67.Hk (Quantum communication) 05.40.Fb (Random walks and Levy flights) 05.45.Mt (Quantum chaos; semiclassical methods)

Peng Xue(薛鹏). Disorder in parity-time symmetric quantum walks[J]. 中国物理B, 2022, 31(1): 10311-010311.

Peng Xue(薛鹏). Disorder in parity-time symmetric quantum walks[J]. Chin. Phys. B, 2022, 31(1): 10311-010311.

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Disorder in parity-time symmetric quantum walks

Disorder in parity-time symmetric quantum walks

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