Experimental observation of information flow in the anti-PT -symmetric system

作     者：Wen, Jingwei Qin, Guoqing Zheng, Chao Wei, Shijie Kong, Xiangyu Xin, Tao Long, Guilu 

作者机构：State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China Tsinghua National Laboratory for Information Science and Technology Beijing100084 China Collaborative Innovation Center of Quantum Matter Beijing100084 China Beijing Academy of Quantum Information Sciences Beijing100193 China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China Center for Quantum Computing Peng Cheng Laboratory Shenzhen518055 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2019年

核心收录：

主　　题：Quantum computers 

摘      要：The recently theoretical and experimental researches related to PT -symmetric system have attracted unprecedented attention because of various novel features and potentials in extending canonical quantum mechanics. However, as the counterpart of PT -symmetry, there are only a few researches on the anti-PT -symmetric quantum system because of the challenges in the quantum simulation of anti-PT -symmetry in experiment. Here, we propose an algorithm for simulating the generalized anti-PT -symmetric system with quantum circuit. Utilizing the protocols, an oscillation of information flow is observed for the first time in our Nuclear Magnetic Resonance quantum simulator. We show that the information will recover from the environment completely when the anti-PT -symmetry is broken, whereas no information can be retrieved in the symmetry-unbroken phase. Our work opens the gate for the practical quantum simulation and experimental investigation of universal anti-PT -symmetric system in the quantum computer. Copyright © 2019, The Authors. All rights reserved.