中国物理B ›› 2008, Vol. 17 ›› Issue (10): 3553-3558.doi: 10.1088/1674-1056/17/10/005
郑 强, 张小平, 任中洲
Zheng Qiang(郑强)†, Zhang Xiao-Ping(张小平), and Ren Zhong-Zhou(任中洲)
摘要: The entanglement dynamics of system, where atoms A and B interact with single mode cavity fields a and b respectively, is studied. The interaction between atom A and cavity a may be described by using the typical Jaynes--Cummings model, while that between the atom B and cavity b filled with a Kerr medium is of a two-photon process. For a certain initial atom entanglement state, there is an entanglement sudden death effect between the two atoms. The Kerr medium in the cavity b can effectively prevent the undesirable entanglement sudden death from occurring. Also, from the viewpoint of the population dynamics, we discuss why the Kerr medium can do so.
中图分类号: (Quantum state engineering and measurements)