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Non-Markovian dynamics of correlations: The composite effect of two channels and robust quantum correlation preserving by detuning

Y. H. Ji

Department of Physics, Jiangxi Normal University, Nanchang, Jiangxi 330022, P. R. China

Key Laboratory of Photoelectronics and Telecommunication of Jiangxi Province, Nanchang, Jiangxi 330022, P. R. China

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and

X. D. Wan

Modern Education Technology Application Center, Jiangxi Normal University, Nanchang Jiangxi 330022, P. R. China

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https://doi.org/10.1142/S021797921450249XCited by:0 (Source: Crossref)

Abstract

We investigate the influence of the composite effect and information backflow effect in non-Markovian channel on the dynamics of quantum correlation including quantum entanglement and quantum discord. It is found that, the composite effect of independent channels is not only harmful to the maintenance of quantum correlation but also unfavorable for the maintenance of classic correlation. In a non-Markovian channel, by regulating the discord between qubit and the center frequency of cavity model, the time of quantum correlation and classical correlation of the system can be effectively prolonged. Thus, the quantum information processing can be achieved more easily under larger detuning.

Keywords:

PACS: 03.65.Ta, 03.65.Ud, 03.67.-a

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