Dynamics and conservation of quantum coherence in a two-body system

doi:10.3969/j.issn.1007-5461.2021.04.006

Abstract

Abstract: The dynamical evolution of quantum entanglement and quantum coherence of two atoms in an extended Werner-like state coupled with two independent zero temperature vacuum reservoirs is studied. It is found that the quantum entanglement and quantum coherence of two atoms are affected by the initial state and purity, and the quantum entanglement and quantum coherence of each subsystem can transfer to each other and satisfy the corresponding conservation equations. It is shown that the initial Bell-like state and purity determine the conservation equations of quantum entanglement and quantum coherence, and for the same Bell-like state, the conservation of quantum entanglement and quantum coherence is not affected by Markovian or non-Markovian environment.

Key words: quantum optics, quantum entanglement, quantum coherence, non-Markovian

CLC Number:

O431.2

GAO Deying∗, LI Ning. Dynamics and conservation of quantum coherence in a two-body system[J]. Chinese Journal of Quantum Electronics, 2021, 38(4): 444-453.

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