中国物理B ›› 2003, Vol. 12 ›› Issue (8): 866-871.doi: 10.1088/1009-1963/12/8/309

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Linear entropy dynamics of the field in the Jaynes－Cummings model with an intensity-dependent coupling in the dispersive approximation

李春先, 方卯发   

  1. Department of Physics, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2003-02-10 修回日期:2003-03-18 出版日期:2005-03-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 19874020), by the Natural Science Foundation of Hunan Province, China (Grant No 01JJY3030) and by the Ministry of Education, China.

Linear entropy dynamics of the field in the Jaynes－Cummings model with an intensity-dependent coupling in the dispersive approximation

Li Chun-Xian (李春先), Fang Mao-Fa (方卯发)   

  1. Department of Physics, Hunan Normal University, Changsha 410081, China
  • Received:2003-02-10 Revised:2003-03-18 Online:2005-03-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 19874020), by the Natural Science Foundation of Hunan Province, China (Grant No 01JJY3030) and by the Ministry of Education, China.

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摘要： We present the linear entropy dynamics of the field state in the dispersive cavity in the Jaynes－Cummings model with an intensity-dependent coupling in the dispersive approximation, and investigate the influence of dissipation on entanglement between the field and the atoms. We show that the coherence properties of the field are also affected by the cavity when the nonlinear process of the field interacting with the atoms with an intensity-dependent coupling is involved, and find that the dissipation constant, the intensity of the field and the atomic distribution angle have different influence on the coherence properties of the field.

Abstract: We present the linear entropy dynamics of the field state in the dispersive cavity in the Jaynes－Cummings model with an intensity-dependent coupling in the dispersive approximation, and investigate the influence of dissipation on entanglement between the field and the atoms. We show that the coherence properties of the field are also affected by the cavity when the nonlinear process of the field interacting with the atoms with an intensity-dependent coupling is involved, and find that the dissipation constant, the intensity of the field and the atomic distribution angle have different influence on the coherence properties of the field.

Key words: coherence loss, linear entropy, entanglement

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
32.80.Qk (Coherent control of atomic interactions with photons)