纠缠态原子与双模压缩态光场相互作用中的纠缠特性  

Entanglement Properties in Interaction of Entangled Atoms with Two-mode Squeezed Light Fields

作　　者：张晋华[1] 孙宇晶[1] 袁兵[1] 

机构地区：[1]天津大学理学院,天津300072

出　　处：《河北师范大学学报（自然科学版）》2007年第1期39-42,72,共5页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(20376054)

摘　　要：对于处于纠缠态的2个原子与双模压缩光场的相互作用,研究了原子与光场之间以及双模光场中2模之间的纠缠性质.令2个原子中的一个留在腔外,另一个进入腔中与光场发生相互作用,发现一般情况下纠缠度随时间周期性地变化,并且周期不受腔外原子的旋转角度以及纠缠态中相位差的影响;但当光场态中的压缩参量与腔外原子的旋转角度满足一定关系时,原子与光场会一直处于解纠缠状态.For the interaction of two entangled atoms with the two-mode squeezed light field, the entanglements between the atom with the light field and that between the two-modes of the light field are studied. Setting that one atom is outside the cavity and the other atom enters the cavity to interact with the light field ,generally the entanglement changes periodically and the period is not affected by the rotation angle of the outside atom and the phase difference in the atomic entangled state. But, if the squeezing parameter of the light field and the rotation angle of the atom outside the cavity satisfy a certain relation,atom and the light field will be disentangled forever.

关 键 词：量子光学 纠缠态 量子约化熵 量子相对熵 相位 

分 类 号：O431.1[机械工程—光学工程]