W态纠缠实现双腔远程控制原子的非经典特性  

Long-distance controlling for the non-classical characteristics of entangled atom in W state in double cavities

作　　者：郭耀武[1] 周原[1] 邵凤兰[1] 

机构地区：[1]曲阜师范大学物理系,曲阜273165

出　　处：《原子与分子物理学报》2008年第3期600-606,共7页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10475049);曲阜师范大学科研启动基金

摘　　要：考虑将双模纠缠相干光场的两模场同时分别注入两个腔中,初态处于W态的三体纠缠二能级原子中的两个分别在这两个腔内,并且都与光场发生共振相互作用.经腔QED演化之后,对纠缠相干光场进行光子探测和对纠缠原子进行选择性测量,通过操纵相互作用的时间和光场的参数可控制W态中处于腔外的第三个原子的非经典效应,如粒子数布居差的崩塌-回复现象和偶极压缩现象,从而实现了更强地远程控制原子的非经典特性.Two-mode fields of two-mode entangled coherent lights are poured into two cavities separately and simultaneously. Two of two-level atoms in three-body entangled state initially, are put in two cavities respectively, interacting separately with two-mode coherent light fields resonantly. After the evolution of cavity QED, photon detection for coherent light fields and selective measurement for atoms are carried out. Through contiolling the interaction time and the parameters of two light fields, Non-classical effects of the third atom, of W state outside the cavity, are controlled, such as the collapse-revival phenomenon of atom＇s occupancy and atomic dipole squeezing phenomenon, thus the stronger long-distance controlling for the non- classical characteristics of the atom can be achieved.

关 键 词：J-C模型 W态 原子偶极压缩 原子粒子数布居 

分 类 号：O431[机械工程—光学工程]