Probing topological states through the exact non-Markovian decoherence dynamics of a spin coupled to a spin bath in the real-time domain

Article

关键词: QUANTUM SIMULATION;    ISING-MODEL;    ENTANGLEMENT;    PHASE;   

DOI  :  10.1103/PhysRevB.102.035133

来源: SCIE

【 摘 要 】

In this paper, we explore the decoherence dynamics of a probing spin coupled to a spin bath, where the spin bath is given by a controllable 1D transverse-field Ising chain. The 1D transverse-field Ising chain with free-end boundary condition is equivalent to a modified Kitaev model with nonlocal Majorana bound states in its topological phase. We find that the non-Markovian decoherence dynamics of the probing spin can manifest the topological structure of the spin chain. By controlling the external magnetic field on the Ising chain, we find a close relationship between the topological phase transition and the non-Markovian dynamics in the real-time domain. We also investigate the corresponding quantum entanglement dynamics in this topological system.

【 授权许可】

Free