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Chin. Phys. B, 2009, Vol. 18(6): 2307-2313    DOI: 10.1088/1674-1056/18/6/032

Optimal entropy squeezing sudden generation and its control for an effective two-level moving atom entanglement with the two-mode coherent fields

Liu Xiao-Juan(刘小娟)a)c), Zhou Yuan-Jun (周元俊)b), and Fang Mao-Fa(方卯发)c)
a Department of Physics, Hunan Normal University, Changsha 410081, China; b Department of Physics, Hunan University of Science and Technology, Xiangtan 411201, China;Department of Physics, Hunan Normal University, Changsha 410081, China; c Department of Physics, Nanjing University, Nanjing 210093, China
Abstract  From the viewpoint of quantum information, this paper proposes a concept and a definition of the atomic optimal entropy squeezing sudden generation (AOESSG) for the system of an effective two-level moving atom which entangles with the two-mode coherent fields. It also researches the relationship between the AOESSG and entanglement sudden death of the atom-fields, and discusses the influences of atomic initial state on the AOESSG and obtains the system parameter which controls the AOESSG.
Keywords:  optical entropy squeezing sudden generation      effective two-level moving atom      entanglement sudden death  
Received:  28 August 2008      Revised:  07 November 2008      Accepted manuscript online: 
PACS:  42.50.Dv (Quantum state engineering and measurements)  
  03.67.Lx (Quantum computation architectures and implementations)  
  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
  37.10.Vz (Mechanical effects of light on atoms, molecules, and ions)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 19874020), the Natural Science Foundation of Hunan Province, China (Grant No 09JJ3012) and the Scientific Research Fund of the Education Department of Hunan Province of China (Grant No 07c543).

Cite this article: 

Liu Xiao-Juan(刘小娟), Zhou Yuan-Jun (周元俊), and Fang Mao-Fa(方卯发) Optimal entropy squeezing sudden generation and its control for an effective two-level moving atom entanglement with the two-mode coherent fields 2009 Chin. Phys. B 18 2307

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