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Restoration of Coherence by Local PT-Symmetric Operator

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Abstract

In this work, we mainly investigate effect of PT-symmetric operation on the dynamics of the relative entropy of coherence for a two-level system within non-Markovian environments, and put forward a feasible physical scheme to recover coherence by means of optimal PT-symmetric operation. The results show that the damaged quantum coherence can be restored to a large extent. Furthermore, the freezing phenomenon of the coherence can be detected by using the optimal PT-symmetric operation strength within the non-Markovian environments.

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Acknowledgements

This work was supported by the National Science Foundation of China (Grant Nos. 11575001, 61601002 and 11847020), Anhui Provincial Natural Science Foundation (Grant No. 1508085QF139) and Natural Science Foundation of Education Department of Anhui Province (Grant No. KJ2016SD49), and also the fund from CAS Key Laboratory of Quantum Information (Grant No. KQI201701).

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Authors and Affiliations

  1. School of Physics & Material Science, Anhui University, Hefei, 230601, China

    Xiao-Gang Fan, Wen-Yang Sun, Dong Wang & Liu Ye

  2. CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026, China

    Dong Wang

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  1. Xiao-Gang Fan
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  2. Wen-Yang Sun
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  3. Dong Wang
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Correspondence to Liu Ye.

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Fan, XG., Sun, WY., Wang, D. et al. Restoration of Coherence by Local PT-Symmetric Operator. Int J Theor Phys 58, 4184–4193 (2019). https://doi.org/10.1007/s10773-019-04284-4

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