Entanglement of two atoms interacting with a dissipative coherent cavity field without rotating wave approximation  

作　　者：康国栋 方卯发 欧阳锡城 邓小娟 

机构地区：[1]College of Physics and Information Science,Hunan Normal University

出　　处：《Chinese Physics B》2010年第11期60-65,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10374025);the Education Ministry of Hunan Province,China (Grant No. 06A038);the Natural Science Foundation of Hunan Province,China (Grant No. 07JJ3013

摘　　要：Considering two identical two-level atoms interacting with a single-model dissipative coherent cavity field without rotating wave approximation, we explore the entanglement dynamics of the two atoms prepared in different states using concurrence. Interestingly, our results show that the entanglement between the two atoms that initially disentangled will come up to a large constant rapidly, and then keeps steady in the following time or always has its maximum when prepared in some special Bell states. The model considered in this study is a good candidate for quantum information processing especially for quantum computation as steady high-degree atomic entanglement resource obtained in dissipative cavit.Considering two identical two-level atoms interacting with a single-model dissipative coherent cavity field without rotating wave approximation, we explore the entanglement dynamics of the two atoms prepared in different states using concurrence. Interestingly, our results show that the entanglement between the two atoms that initially disentangled will come up to a large constant rapidly, and then keeps steady in the following time or always has its maximum when prepared in some special Bell states. The model considered in this study is a good candidate for quantum information processing especially for quantum computation as steady high-degree atomic entanglement resource obtained in dissipative cavit.

关 键 词：atomic entanglement Tavis-Cummings model rotating wave approximation characteristic function 

分 类 号：O431.2[机械工程—光学工程] O562[理学—光学]