中国物理B ›› 2008, Vol. 17 ›› Issue (8): 2963-2968.doi: 10.1088/1674-1056/17/8/033

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Quantum entanglement in the mode-mode competition system

方卯发1, 胡要花1, 吴 琴2, 冯永振2   

  1. (1)College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; (2)School of Basic Medical Science, Guangdong Medical College, Dongguan 523808, China
  • 收稿日期:2007-10-26 修回日期:2007-12-11 出版日期:2008-08-20 发布日期:2008-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10374025).

Quantum entanglement in the mode-mode competition system

Wu Qin(吴琴)a)†, Fang Mao-Fa(方卯发)b), Feng Yong-Zhen(冯永振)a), and Hu Yao-Hua(胡要花)b)   

  1. a School of Basic Medical Science, Guangdong Medical College, Dongguan 523808, China; b College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • Received:2007-10-26 Revised:2007-12-11 Online:2008-08-20 Published:2008-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10374025).

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摘要： Considering a two-level atom interacting with the competing two-mode field, this paper investigates the entanglement between the two-level atom and the two-mode field by using the quantum reduced entropy, and that between the two-mode field by using the quantum relative entropy of entanglement. It shows that the two kinds of entanglement are dependent on the relative coupling strength of atom-field and the atomic distribution, and exhibit the periodical evolution. The maximal atom--field entanglement state can be prepared via the appropriate selection of system parameters and interaction time.

关键词: mode-mode competition system, entanglement, reduced entropy, relative entropy

Abstract: Considering a two-level atom interacting with the competing two-mode field, this paper investigates the entanglement between the two-level atom and the two-mode field by using the quantum reduced entropy, and that between the two-mode field by using the quantum relative entropy of entanglement. It shows that the two kinds of entanglement are dependent on the relative coupling strength of atom-field and the atomic distribution, and exhibit the periodical evolution. The maximal atom--field entanglement state can be prepared via the appropriate selection of system parameters and interaction time.

Key words: mode-mode competition system, entanglement, reduced entropy, relative entropy

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
03.67.Mn (Entanglement measures, witnesses, and other characterizations) 42.50.Dv (Quantum state engineering and measurements)