Experimental simulation of the parity-time symmetric dynamics using photonic qubits
Experimental simulation of the parity-time symmetric dynamics using photonic qubits
复制标题
使用光子量子位对奇偶时间对称动力学进行实验模拟
DOI：
10.1364/oe.405815
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发表时间：
2021-01-04
期刊：
影响因子：
3.8
通讯作者：
Wang, Chuan
中科院分区：
文献类型：
--
作者：
Gao, Wei-Chao;Zheng, Chao;Wang, Chuan
The concept of parity-time (PT) symmetry originates from the framework of quantum mechanics, where if the Hamiltonian operator satisfies the commutation relation with the parity and time operators, it shows all real eigen-energy spectrum. Recently, PT symmetry was introduced into optics, electronic circuits, acoustics, and so many other classical fields to further study the dynamics of the Hamiltonian and the energy of the system. Focusing on the dynamical evolution of the quantum state under the action of PT symmetric Hamiltonian, here we experimentally demonstrated the general dynamical evolution of a two-level system under the PT symmetric Hamiltonian using single-photon system. By enlarging the system using ancillary qubits and encoding the subsystem under the non-Hermitian Hamiltonian with post-selection, the evolution of the state can be observed with a high fidelity when the successfully parity-time symmetrically evolved subspace is solely considered. Owing to the effectively operation of the dilation method, our work provides a route for further exploiting the exotic properties of PT symmetric Hamiltonian for quantum simulation and quantum information processing.
