双模光场与运动三能级原子作用系统的反聚束效应  

Photon antibunching effect in the system of two-mode entangled coherent states interacting with a moving V-type three-level atom

作　　者：汪贤才[1,2] 曹卓良[1,2] 

机构地区：[1]池州学院物理系 [2]安徽大学物理与材料科学学院

出　　处：《原子与分子物理学报》2007年第4期785-792,共8页Journal of Atomic and Molecular Physics

基　　金：安徽省教育厅重点项目(2004kj005zd);安徽省自然科学基金(03042401)

摘　　要：采用求解Schrdinger方程和数值计算方法,研究了双模纠缠相干光场与运动V型三能级原子相互作用过程中的聚束和反聚束效应.结果表明:平均光子数变动不大,系统就会由聚束效应跃变为反聚束效应,关联程度最强;平均光子数取一定数值时,原子运动速度增大引起时间演化曲线显著上移,振荡周期变小,对系统的聚束和反聚束效应也有较强影响.当平均光子数较大时,原子初态和双模纠缠相干光场的纠缠度无任何影响;仅当平均光子数较小时,原子初态和双模纠缠相干光场的纠缠度变化引起曲线振荡幅度变化,位置发生小幅度移动,产生弱关联.By means of solving Schrǒdinger equation and numerical calculations, photon bunching and antibunching effect in the system of the two-mode entangled coherent states interacting with a moving V-type three-level atom is investigated. The results indicate that the effect of photon bunching and antibunching in the system intensively depend on mean photon numbers of the two-mode entangled coherent states and the speed of the atom. For a special mean photon number, the velocity of atom will afftect the effect of photon bunching and antibunching intensively. For those relatively large mean photon numbers, the initial state of the atom and the degree of entanglement of the two-mode entangled coherent states have no influences on the effect of photon bunching and antibunching. For those relatively small mean photon numbers, the initial state of the atom and the degree of entanglement of the two-mode entangled coherent states only have slight influences on the effect of photon bunching and antibunching.

关 键 词：量子光学 双模纠缠相干光场 运动V型三能级原子 共振作用 反聚束效应 

分 类 号：O431.2[机械工程—光学工程]