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Chin. Phys. B, 2008, Vol. 17(8): 2963-2968    DOI: 10.1088/1674-1056/17/8/033
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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)
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
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.
Keywords:  mode-mode competition system      entanglement      reduced entropy      relative entropy  
Received:  26 October 2007      Revised:  11 December 2007      Accepted manuscript online: 
PACS:  03.65.Ud (Entanglement and quantum nonlocality)  
  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
  42.50.Dv (Quantum state engineering and measurements)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10374025).

Cite this article: 

Wu Qin(吴琴), Fang Mao-Fa(方卯发), Feng Yong-Zhen(冯永振), and Hu Yao-Hua(胡要花) Quantum entanglement in the mode-mode competition system 2008 Chin. Phys. B 17 2963

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