T-C模型中纠缠原子与相干态光场相互作用平均光子数的演化  

Mean photon number evolution of entangled atoms interacting with coherent state light-filed in T-C model

作　　者：张多[1] 董长缨[1] 刘国君[2] 

机构地区：[1]武汉工业学院数理科学系,武汉430023 [2]湖北大学物电学院,武汉430062

出　　处：《原子与分子物理学报》2007年第4期843-848,共6页Journal of Atomic and Molecular Physics

基　　金：武汉工业学院科校立科研项目(05y25)

摘　　要：研究了一对纠缠的二能级原子与单模相干态光场的相互作用,得出平均光子数随时间的演化规律.讨论了相干振幅分量模平方|α|2、原子-场的耦合系数g、原子间的耦合系数ε及纠缠因子cosθ对光场的平均光子数的〈n(t)〉的影响,结果表明:随着相干振幅分量模平方,原子-场的耦合系数,原子间的耦合系数的变化,平均光子数演化曲线的平均值和系统量子崩塌-复苏的周期都会随之变化.但纠缠因子的变化并不影响量子崩塌-复苏的周期,只是使平均光子数随时间演化的值慢慢变化.We study a couple of entangled two-level atoms interacting with one model coherent state light-filed by means of the quantum theory in interacting picture. The mean photon number evolution of entangled atoms interacting with coherent state light-filed is given. Meanwhile, the influence of the coherent vibration amplitude ｜α｜^2 of the field-atom, the coupling constant g of atom-field, the coupling constant ε of two atoms and the entanglement factor cosθ of two atoms on the mean photon number 〈n（t）〉of light-field are also discussed. We find that mean value of mean photon number evolution and the cycle of system quantum collapse- and-revival will change when the coherent vibration amplitude of the field-atom, the coupling constant of atom-field and the coupling constant of two atoms change. The variation of entanglement factor will not affect on the cycle of system quantum collapse-and-revival, while it could vary the value of mean photon number slowly.

关 键 词：TAVIS-CUMMINGS模型 纠缠原子 相干态光场 平均光子数 

分 类 号：O431.2[机械工程—光学工程]