Experimental Investigation of State Distinguishability in Parity-Time Symmetric Quantum Dynamics

Yi-Tao Wang, Zhi-Peng Li, Shang Yu, Zhi-Jin Ke, Wei Liu, Yu Meng, Yuan-Ze Yang, Jian-Shun Tang, Chuan-Feng Li, and Guang-Can Guo
Phys. Rev. Lett. 124, 230402 – Published 11 June 2020
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Abstract

Comprehensive study on parity-time (PT) symmetric systems demonstrates the novel properties and innovative application of non-Hermitian physics in recent years. In the quantum regime, PT symmetric physics exhibits unique quantum dynamical behaviors such as spontaneous state-distinguishability oscillation. However, the construction and control of a PT symmetric quantum system are still challenging, that and restrict the experimental investigation of PT symmetric quantum nature and application. In this Letter, we propose and construct a recycling-structure PT symmetric quantum simulator for the first time, which can effectively simulate the discrete-time dynamical process of a PT symmetric quantum system in both unbroken and broken phases, to be different from our previous work [J.-S. Tang, et al., Nat. Photonics 10, 642 (2016)]. We investigate the dynamical features of quantum state distinguishability based on the PT symmetric simulator. Our results demonstrate the novel PT symmetric quantum dynamics characterized by the periodical oscillation of state distinguishability in the unbroken phase, and the monotonic decay of that in the broken phase. This work also provides a practical experimental platform for the future intensive study of PT symmetric quantum dynamics.

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  • Received 20 October 2019
  • Accepted 26 May 2020

DOI:https://doi.org/10.1103/PhysRevLett.124.230402

© 2020 American Physical Society

Physics Subject Headings (PhySH)

General PhysicsQuantum Information, Science & Technology

Authors & Affiliations

Yi-Tao Wang, Zhi-Peng Li, Shang Yu, Zhi-Jin Ke, Wei Liu, Yu Meng, Yuan-Ze Yang, Jian-Shun Tang*, Chuan-Feng Li, and Guang-Can Guo

  • CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, People’s Republic of China and CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China

  • *tjs@ustc.edu.cn
  • cfli@ustc.edu.cn

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Issue

Vol. 124, Iss. 23 — 12 June 2020

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