中国物理B ›› 2005, Vol. 14 ›› Issue (6): 1147-1151.doi: 10.1088/1009-1963/14/6/016

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Linear entropies in the Jaynes-Cummings model with intensity-dependent coupling in a phase-damped cavity

周青春1, 祝世宁2   

  1. (1)Department of Mathematics and Physics, Jiansu University of Science and Technology, Zhenjiang 212003, China;Department of Physics, Nanjing University, Nanjing 210093, China;; (2)Department of Physics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2004-08-31 修回日期:2004-12-14 出版日期:2005-05-27 发布日期:2005-05-27
  • 基金资助:
    Project supported by the National Science Foundation of China (Grant No. 90201008) and the Science Foundation of Jiangsu Province, China (Contract No. BK2002202).

Linear entropies in the Jaynes-Cummings model with intensity-dependent coupling in a phase-damped cavity

Zhou Qing-Chun (周青春)ab, Zhu Shi-Ning (祝世宁)b   

  1. a Department of Mathematics and Physics, Jiansu University of Science and Technology, Zhenjiang 212003, China; b Department of Physics, Nanjing University, Nanjing 210093, China
  • Received:2004-08-31 Revised:2004-12-14 Online:2005-05-27 Published:2005-05-27
  • Supported by:
    Project supported by the National Science Foundation of China (Grant No. 90201008) and the Science Foundation of Jiangsu Province, China (Contract No. BK2002202).

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摘要： We investigate the evolution of a quantum system described by the Jaynes-Cummings model with an arbitrary form of intensity-dependent coupling by displaying the linear entropies of the atom, field and atom-field system in the large detuning approximation. The cavity field is assumed to be coupled to a reservoir with a phase-damping coupling. The effects of cavity phase damping on the entanglement and coherence loss of such a system are studied.

关键词: Phase damping, JCM with intensity-dependent coupling, linear entropy, coherence loss

Abstract: We investigate the evolution of a quantum system described by the Jaynes-Cummings model with an arbitrary form of intensity-dependent coupling by displaying the linear entropies of the atom, field and atom-field system in the large detuning approximation. The cavity field is assumed to be coupled to a reservoir with a phase-damping coupling. The effects of cavity phase damping on the entanglement and coherence loss of such a system are studied.

Key words: Phase damping, JCM with intensity-dependent coupling, linear entropy, coherence loss

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

  • 42.50.Dv
03.65.Ge (Solutions of wave equations: bound states) 32.80.-t (Photoionization and excitation)