Abstract
Comprehensive study on parity-time () symmetric systems demonstrates the novel properties and innovative application of non-Hermitian physics in recent years. In the quantum regime, symmetric physics exhibits unique quantum dynamical behaviors such as spontaneous state-distinguishability oscillation. However, the construction and control of a symmetric quantum system are still challenging, that and restrict the experimental investigation of symmetric quantum nature and application. In this Letter, we propose and construct a recycling-structure symmetric quantum simulator for the first time, which can effectively simulate the discrete-time dynamical process of a 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 symmetric simulator. Our results demonstrate the novel 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 symmetric quantum dynamics.
- Received 20 October 2019
- Accepted 26 May 2020
DOI:https://doi.org/10.1103/PhysRevLett.124.230402
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