拉曼耦合J-C模型中原子与光场间的量子纠缠  

Entanglement Between Atom and Field in Raman Coupling J-C Model

作　　者：张立辉[1] 黄晖[2] 周本元[2] 

机构地区：[1]江汉大学物理与信息工程学院,武汉430056 [2]华中师范大学物理科学与技术学院,武汉430079

出　　处：《江汉大学学报（自然科学版）》2007年第4期29-32,共4页Journal of Jianghan University：Natural Science Edition

摘　　要：研究了拉曼耦合J-C模型中存在位相损耗时,原子与光场间的量子纠缠性质,讨论了位相损耗、光场平均光子数和不同的原子初态对系统纠缠特性的影响.结果表明:由于位相损耗的存在,使系统的纠缠随时间演化而减弱,但并不改变其演化的周期性;当光场较强时,其纠缠明显减弱;原子初始所处的状态对系统的纠缠性质也会产生明显的影响.The property of quantum entanglement between atom and field in a Raman coupling J-C model in the presence of the phase-damping is studied. The effects of phase damping, average photon number, and different atomic original states on the entanglement have been investigated. It has been shown that with the time development, the degree of entanglement decreases because of the phase damping but the oscillatory period is invariable. When the strength of the laser field is strong, the degree of entanglement apparently becomes small. Furthermore, the atomic original states have obvious effect on theentanglement.

关 键 词：拉曼耦合J-C模型 量子纠缠 位相损耗 

分 类 号：O431.2[机械工程—光学工程]