中国物理B ›› 2023, Vol. 32 ›› Issue (8): 80302-080302.doi: 10.1088/1674-1056/accb4e

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Quantum interferometric power and non-Markovianity in the decoherence channels

Shaojie Xiong(熊少杰)1, Zhe Sun(孙哲)2,†, and Xiaoguang Wang(王晓光)3,‡   

  1. 1. Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, China;
    2. Department of Physics, Hangzhou Normal University, Hangzhou 310036, China;
    3. Key Laboratory of Optical Field Manipulation of Zhejiang Province and Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
  • 收稿日期:2023-03-02 修回日期:2023-04-05 接受日期:2023-04-07 发布日期:2023-07-26
  • 通讯作者: Zhe Sun, Xiaoguang Wang E-mail:sunzhe@hznu.edu.cn;xgwang@zstu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant Nos.11935012,12175052, and 11775065) and the Postdoctoral Science Foundation of China (Grant No.2022M722794).

Quantum interferometric power and non-Markovianity in the decoherence channels

Shaojie Xiong(熊少杰)1, Zhe Sun(孙哲)2,†, and Xiaoguang Wang(王晓光)3,‡   

  1. 1. Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, China;
    2. Department of Physics, Hangzhou Normal University, Hangzhou 310036, China;
    3. Key Laboratory of Optical Field Manipulation of Zhejiang Province and Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
  • Received:2023-03-02 Revised:2023-04-05 Accepted:2023-04-07 Published:2023-07-26
  • Contact: Zhe Sun, Xiaoguang Wang E-mail:sunzhe@hznu.edu.cn;xgwang@zstu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos.11935012,12175052, and 11775065) and the Postdoctoral Science Foundation of China (Grant No.2022M722794).

摘要: In quantum open systems, non-Markovianity is an important phenomenon that allows a backflow of information from the environment to the system. In this work, we investigate the non-Markovianity problems in two different types of channels, where the system-environment interactions are treated with and without the rotating-wave approximation (RWA). We employ the quantum interferometric power (QIP) to quantify the non-Markovian dynamics, which is the minimal quantum Fisher information obtained by the local unitary evolution in a bipartite system. By the hierarchy equation method, we calculate the dynamical evolution of the QIP in the non-RWA case. The results show that the dynamical behavior under the non-RWA is significantly different from that under the RWA in both weak and strong coupling. Moreover, in the non-RWA case, we also find the nonmonotonic behavior of the non-Markovianity measure with the variation of coupling strength, which is caused by the competition between the rotating-wave terms and the counterrotating-wave terms. As a result, we highlight the importance of the counterrotating-wave terms for the influence of non-Markovianity.

关键词: quantum open system, auantum non-Markovianity, auantum interferometric power

Abstract: In quantum open systems, non-Markovianity is an important phenomenon that allows a backflow of information from the environment to the system. In this work, we investigate the non-Markovianity problems in two different types of channels, where the system-environment interactions are treated with and without the rotating-wave approximation (RWA). We employ the quantum interferometric power (QIP) to quantify the non-Markovian dynamics, which is the minimal quantum Fisher information obtained by the local unitary evolution in a bipartite system. By the hierarchy equation method, we calculate the dynamical evolution of the QIP in the non-RWA case. The results show that the dynamical behavior under the non-RWA is significantly different from that under the RWA in both weak and strong coupling. Moreover, in the non-RWA case, we also find the nonmonotonic behavior of the non-Markovianity measure with the variation of coupling strength, which is caused by the competition between the rotating-wave terms and the counterrotating-wave terms. As a result, we highlight the importance of the counterrotating-wave terms for the influence of non-Markovianity.

Key words: quantum open system, auantum non-Markovianity, auantum interferometric power

中图分类号:  (Quantum mechanics)

  • 03.65.-w
05.30.-d (Quantum statistical mechanics) 03.65.Yz (Decoherence; open systems; quantum statistical methods)