中国物理B ›› 2009, Vol. 18 ›› Issue (10): 4117-4121.doi: 10.1088/1674-1056/18/10/009

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Entanglement evolution and transfer in a double Tavis--Cumming model in cavity QED

徐庆君, 张士英   

  1. Department of Physics and Electronic Engineering, Zaozhuang University, Zaozhuang 277160, China
  • 收稿日期:2008-12-02 修回日期:2009-01-09 出版日期:2009-10-20 发布日期:2009-10-20

Entanglement evolution and transfer in a double Tavis--Cumming model in cavity QED

Xu Qing-Jun(徐庆君)† and Zhang Shi-Ying(张士英)   

  1. Department of Physics and Electronic Engineering, Zaozhuang University, Zaozhuang 277160, China
  • Received:2008-12-02 Revised:2009-01-09 Online:2009-10-20 Published:2009-10-20

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摘要： We have studied entanglement evolution and transfer in a double Tavis--Cumming model where two pairs of entangled two-level atoms AB and CD interact with two single-mode cavity fields a and b. We show that the Bell-like initial state of atoms AB can exhibit entanglement sudden death which should be independent of the initial entanglement of atoms CD. Also, we show that the initial entanglement of one atomic pair can be transferred into another pair, as well as the possible subsystems, that become entangled during evolution.

Abstract: We have studied entanglement evolution and transfer in a double Tavis--Cumming model where two pairs of entangled two-level atoms AB and CD interact with two single-mode cavity fields a and b. We show that the Bell-like initial state of atoms AB can exhibit entanglement sudden death which should be independent of the initial entanglement of atoms CD. Also, we show that the initial entanglement of one atomic pair can be transferred into another pair, as well as the possible subsystems, that become entangled during evolution.

Key words: entanglement evolution, entanglement transfer, Tavis--Cumming model

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
42.50.Pq (Cavity quantum electrodynamics; micromasers)