两个失谐腔中两个原子的纠缠突然死亡(英文)  

Sudden death of entanglement between two atoms in two detuning cavities

作　　者：杜鸣笛[1] 刘翔[1] 

机构地区：[1]湖南师范大学物理与信息科学学院,湖南长沙410081

出　　处：《量子电子学报》2009年第2期218-222,共5页Chinese Journal of Quantum Electronics

基　　金：Project supported by National Natural Science Foundation of China(10374025);Natural Science Foundation of Hunan Province(07JJ3013);Education Ministry of Hunan Province(06A038)

摘　　要：在两个腔都失谐的情况下,两个原子分别与两个光场耦合的模型中,研究了初始纠缠的两个原子出现了纠缠突然死亡现象的问题。从结果可以看出:两个原子的纠缠在任何情况下都呈现明显的周期性现象;两个原子的纠缠突然死亡不仅与两个腔的失谐量大小有关系,而且还与两个原子的初始纠缠度大小有关系。同时探讨了原子和场的两个耦合系数的比值大小对两个原子的纠缠突然死亡的影响。Sudden death of entanglement between two entangled atoms independently coupled to fields is investigated in two detuning cavities. The results show that the entanglement between two atoms evolves periodically and sudden death of entanglement depends on not only the detuning but also the two atomic initial states. And the influence of the ratio of the two atom-field coupling constants on sudden death of entanglement is discussed.

关 键 词：量子光学 纠缠的突然死亡 CONCURRENCE 两个原子 失谐 

分 类 号：O431.2[机械工程—光学工程]