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Chin. Phys. B, 2022, Vol. 31(1): 010311    DOI: 10.1088/1674-1056/ac3741
Special Issue: SPECIAL TOPIC — Non-Hermitian physics
SPECIAL TOPIC—Non-Hermitian physics Prev   Next  

Disorder in parity-time symmetric quantum walks

Peng Xue(薛鹏)
Beijing Computational Science Research Center, Beijing 100084, China
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.
Keywords:  parity-time symmetry      quantum walks      disorder  
Received:  02 October 2021      Revised:  04 November 2021      Accepted manuscript online:  06 November 2021
PACS:  03.67.Lx (Quantum computation architectures and implementations)  
  03.67.Hk (Quantum communication)  
  05.40.Fb (Random walks and Levy flights)  
  05.45.Mt (Quantum chaos; semiclassical methods)  
Fund: This work was supported by the National Natural Science Foundation of China (Grant Nos. 12025401 and U1930402).
Corresponding Authors:  Peng Xue     E-mail:

Cite this article: 

Peng Xue(薛鹏) Disorder in parity-time symmetric quantum walks 2022 Chin. Phys. B 31 010311

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