›› 2014, Vol. 23 ›› Issue (11): 110305-110305.doi: 10.1088/1674-1056/23/11/110305

• GENERAL • 上一篇    下一篇

Non-Markovianity of the Heisenberg XY spin environment with Dzyaloshinskii-Moriya interaction

项俊东a, 秦立国b, 田立君a   

  1. a Department of Physics, Shanghai University, Shanghai 200444, China;
    b Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
  • 收稿日期:2014-02-24 修回日期:2014-04-23 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11075101 and 11275119).

Non-Markovianity of the Heisenberg XY spin environment with Dzyaloshinskii-Moriya interaction

Xiang Jun-Dong (项俊东)a, Qin Li-Guo (秦立国)b, Tian Li-Jun (田立君)a   

  1. a Department of Physics, Shanghai University, Shanghai 200444, China;
    b Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
  • Received:2014-02-24 Revised:2014-04-23 Online:2014-11-15 Published:2014-11-15
  • Contact: Tian Li-Jun E-mail:tianlijun@staff.shu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11075101 and 11275119).

摘要: Using the effective non-Markovian measure proposed by Breuer et al. recently, we study the memory effect of a central qubit system coupled to a spin chain environment with Dzyaloshinskii-Moriya interaction in a transverse field. It is discovered that the central qubit system presents different memory effects in different environment phases with the different oscillatory behaviors of the decoherence factor. Moreover, it is revealed that the Dzyaloshinskii-Moriya interaction has a prominent influence on the memory effect of a central qubit system via modifying the amplitude and period of the decoherence factor under certain conditions.

关键词: non-Markovinity, qubit dynamics, spin chain

Abstract: Using the effective non-Markovian measure proposed by Breuer et al. recently, we study the memory effect of a central qubit system coupled to a spin chain environment with Dzyaloshinskii-Moriya interaction in a transverse field. It is discovered that the central qubit system presents different memory effects in different environment phases with the different oscillatory behaviors of the decoherence factor. Moreover, it is revealed that the Dzyaloshinskii-Moriya interaction has a prominent influence on the memory effect of a central qubit system via modifying the amplitude and period of the decoherence factor under certain conditions.

Key words: non-Markovinity, qubit dynamics, spin chain

中图分类号:  (Decoherence; open systems; quantum statistical methods)

  • 03.65.Yz
05.45.-a (Nonlinear dynamics and chaos) 75.10.Pq (Spin chain models)