中国物理B ›› 2010, Vol. 19 ›› Issue (3): 30309-030309.doi: 10.1088/1674-1056/19/3/030309

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Entanglement dynamics of a double two-photon Jaynes－Cummings model with Kerr-like medium

方卯发1, 康国栋1, 邓小娟1, 欧阳锡城2, 黄利元3   

  1. (1)College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; (2)College of Physics and Information Science, Hunan Normal University, Changsha 410081, China;College of Science, Hunan Agricultural University, Changsha 410128, China; (3)Department of Electronic and Communication Engineering, Changsha University, Changsha 410003, China
  • 收稿日期:2009-07-19 修回日期:2009-08-11 出版日期:2010-03-15 发布日期:2010-03-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10374025), the Natural Science Foundation of Hunan Province of China (Grant No. 07JJ3013) and the Education Ministry of Hunan Province of China (Grant No. 06A038).

Entanglement dynamics of a double two-photon Jaynes－Cummings model with Kerr-like medium

Ouyang Xi-Cheng(欧阳锡城)a)b), Fang Mao-Fa(方卯发)a)†, Kang Guo-Dong(康国栋) a), Deng Xiao-Juan(邓小娟)a), and Huang Li-Yuan(黄利元)c)   

  1. a College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; b College of Science, Hunan Agricultural University, Changsha 410128, China; c Department of Electronic and Communication Engineering, Changsha University, Changsha 410003, China
  • Received:2009-07-19 Revised:2009-08-11 Online:2010-03-15 Published:2010-03-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10374025), the Natural Science Foundation of Hunan Province of China (Grant No. 07JJ3013) and the Education Ministry of Hunan Province of China (Grant No. 06A038).

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摘要： In this paper, the entanglement dynamics of a double two-photon Jaynes--Cummings model with Kerr-like medium is investigated. It is shown that initial entanglement has an interesting subsequent time evolution, including the so-called entanglement sudden death effect. It is also shown analytically that the Kerr-like medium can repress entanglement sudden death and enhance the degree of atom--atom entanglement. A more interesting fact is that the Kerr effect is more obvious when each of the two cavities with have the Kerr-like medium than only one of them with the Kerr-like medium.

Abstract: In this paper, the entanglement dynamics of a double two-photon Jaynes--Cummings model with Kerr-like medium is investigated. It is shown that initial entanglement has an interesting subsequent time evolution, including the so-called entanglement sudden death effect. It is also shown analytically that the Kerr-like medium can repress entanglement sudden death and enhance the degree of atom--atom entanglement. A more interesting fact is that the Kerr effect is more obvious when each of the two cavities with have the Kerr-like medium than only one of them with the Kerr-like medium.

Key words: entanglement sudden death, concurrence, two-photon Jaynes--Cummings model, Kerr-like medium

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
42.65.Hw (Phase conjugation; photorefractive and Kerr effects)