中国物理B ›› 2007, Vol. 16 ›› Issue (11): 3396-3401.doi: 10.1088/1009-1963/16/11/042

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Entanglement between two atoms in the system of Schr?dinger cat state interacting with two entangled atoms

刘堂昆   

  • 出版日期:2007-11-20 发布日期:2007-11-20

Entanglement between two atoms in the system of Schrödinger cat state interacting with two entangled atoms

Liu Tang-Kun(刘堂昆)†   

  1. Hubei Province Key Laboratory of Bioanalytical Technique (Hubei Normal University), Department of Physics, Hubei Normal University, Huangshi 435002, China
  • Online:2007-11-20 Published:2007-11-20

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Abstract: By the negative eigenvalues of partial transposition of density matrix, this paper investigates the time evolution of entanglement of the two entangled atoms in the system of two atoms interacting with Schr?dinger cat state. The result shows that the two atoms are always in the entanglement state, and the degree of entanglement between the two atoms exhibits ordinary collapses and revivals at 0.2 degree of entanglement, when the light field is large enough. On the other hand, the reinforcement of three different light fields on the degree of entanglement between two atoms is not evident.  

Key words: negative eigenvalues, entanglement state, Schr?dinger cat state

中图分类号:  (Solutions of wave equations: bound states)

  • 03.65.Ge
03.65.Fd (Algebraic methods) 03.65.Ta (Foundations of quantum mechanics; measurement theory) 03.65.Ud (Entanglement and quantum nonlocality) 42.50.Dv (Quantum state engineering and measurements)