Entangled states in the two-mode coherent fields interacting with a two-level atom
Liu Xiao-Juan (刘小娟)abc, Fang Mao-Fa (方卯发)ab
a Department of Physics, Hunan Normal University, Changsha 410081, China; b Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, Chinac Department of Physics, Xiangtan Normal College, Xiangtan 411202, China
Abstract We investigate the entanglement properties of the two-mode coherent fields interacting with a two-level atom via the two-photon transition. We discuss the quantum entanglement between the two-mode coherent fields and the two-level atom by using the quantum reduced entropy and that between the two-mode coherent fields by using the quantum relative entropy. We also examine the influences of the initial states of the atom and the two-mode coherent fields on the quantum entanglement of the system. Our results show that three types of entangled states can be prepared via the two-mode coherent fields interacting with a two-level atom and choosing appropriately the initial-state parameters of the system.
Received: 24 January 2003
Revised: 21 April 2003
Accepted manuscript online:
(Entanglement measures, witnesses, and other characterizations)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 19874020), the Natural Science Foundation of Hunan Province, China (Grant No 01JJY3030), and the Scientific Research Fund from the Education Bureau of Hunan Province, China(Grant No 01C260).
Cite this article:
Liu Xiao-Juan (刘小娟), Fang Mao-Fa (方卯发) Entangled states in the two-mode coherent fields interacting with a two-level atom 2003 Chinese Physics 12 971
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