中国物理B ›› 2009, Vol. 18 ›› Issue (1): 40-45.doi: 10.1088/1674-1056/18/1/007

• GENERAL • 上一篇    下一篇

Dynamical nonlocality of the entangled coherent state in the phase damping model

逯怀新, 李英德   

  1. Department of Physics and Electronic Science, Weifang University, Weifang 261061, China
  • 收稿日期:2008-05-16 修回日期:2008-07-11 出版日期:2009-01-20 发布日期:2009-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60878001) and the Natural Science Foundation of Shandong Province, China (Grant No Y2006 A24).

Dynamical nonlocality of the entangled coherent state in the phase damping model

Lu Huai-Xin(逯怀新)† and Li Ying-De(李英德)   

  1. Department of Physics and Electronic Science, Weifang University, Weifang 261061, China
  • Received:2008-05-16 Revised:2008-07-11 Online:2009-01-20 Published:2009-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60878001) and the Natural Science Foundation of Shandong Province, China (Grant No Y2006 A24).

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摘要： This paper studies the dynamics of nonlocality for a bosonic entangled coherent state in a phase damping model. The density operator of the system is solved by using a superoperator method. The dynamics of nonlocality for the bosonic entangled coherent state is uncovered by the Bell operator based on the pseudospin operator of a light field. The dynamics of the nonlocality for this state has also been studied by other Bell operators. The result of the numerical calculations of the Bell function shows that the quantum nonlocality heavily depends on the chosen Bell operator.

Abstract: This paper studies the dynamics of nonlocality for a bosonic entangled coherent state in a phase damping model. The density operator of the system is solved by using a superoperator method. The dynamics of nonlocality for the bosonic entangled coherent state is uncovered by the Bell operator based on the pseudospin operator of a light field. The dynamics of the nonlocality for this state has also been studied by other Bell operators. The result of the numerical calculations of the Bell function shows that the quantum nonlocality heavily depends on the chosen Bell operator.

Key words: entangled coherent state, nonlocality dynamics, Bell operators

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
03.67.Mn (Entanglement measures, witnesses, and other characterizations)