Decoherence induced by non-Markovian noise in a nonequilibrium environment

Xiangji Cai (蔡祥吉) and Yujun Zheng (郑雨军)
Phys. Rev. A 94, 042110 – Published 17 October 2016

Abstract

We investigate theoretically the dynamical dephasing of a quantum system induced by non-Markovian noise in a nonequilibrium environment. We derive the closed equation of the dephasing factor for the quantum system under the nonstationary non-Markovian dichotomic noise environment. It is shown that the nonequilibrium feature of the environment gives rise to a time-dependent frequency shift and suppresses the dynamical dephasing of the quantum system and the environmental backaction of coherence. The memory effect of the environmental noise can reduce the dynamical dephasing of the quantum system and make the coherent backaction from the environment prominent. The non-Markovian feature of the environment, however, may not result in non-Markovian behavior in the dephasing dynamics of the quantum system.

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  • Received 20 July 2016

DOI:https://doi.org/10.1103/PhysRevA.94.042110

©2016 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & ThermodynamicsGeneral Physics

Authors & Affiliations

Xiangji Cai (蔡祥吉) and Yujun Zheng (郑雨军)*

  • School of Physics, Shandong University, Jinan 250100, China

  • *yzheng@sdu.edu.cn

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Issue

Vol. 94, Iss. 4 — October 2016

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