The recently theoretical and experimental researches on \({\mathcal{PT}}\)-symmetric system have attracted unprecedented attention because of the various interesting features and potential applications in extending canonical quantum mechanics. However, as the counterpart of \({\mathcal{PT}}\)-symmetry, there are few experimental researches on the anti-\({\mathcal{PT}}\)-symmetric quantum system because of the challenges in simulating anti-\({\mathcal{PT}}\)-symmetry in experiment. Here, we propose an algorithm for simulating the generalized anti-\({\mathcal{PT}}\)-symmetric system in the quantum circuit model. Utilizing the algorithm, we demonstrated the quantum simulation of anti-\({\mathcal{PT}}\) system experimentally, and an oscillation of information flow is observed in a nuclear magnetic resonance quantum simulator. The experiment showed that the information could recover from the environment completely when the anti-\({\mathcal{PT}}\)-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-\({\mathcal{PT}}\)-symmetric system in a quantum computer.

由于对称结构的各种有趣特征和潜在应用，最近对\（{\ mathcal {PT}} \）对称系统的理论和实验研究引起了空前的关注。但是，作为\（{\ mathcal {PT}} \）对称性的对应物，由于模拟中的挑战，很少有关于反\（{\ mathcal {PT}} \）对称量子系统的实验研究。实验中的反\（{\ mathcal {PT}} \）对称性。在这里，我们提出了一种在量子电路模型中模拟广义反\（{\ mathcal {PT}} \）对称系统的算法。利用该算法，我们演示了反抗的量子模拟\（{{mathcal {PT}} \）系统，并在核磁共振量子模拟器中观察到信息流的振荡。实验表明，当反\（{\ mathcal {PT}} \）对称性破坏时，信息可以从环境中完全恢复，而在对称性未破坏阶段则无法检索到任何信息。我们的工作打开了实用的量子仿真和万能抗的实验研究门\（{\ mathcal {PT}} \）在量子计算机-对称系统。