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)
aSchool of Basic Medical Science, Guangdong Medical College, Dongguan 523808, China; bCollege 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.
Received: 26 October 2007
Revised: 11 December 2007
Accepted manuscript online:
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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