纠缠原子与光场作用体系的压缩特性  

Squeezing properties in a system of entangled atoms interacting with optical field

作　　者：刘堂昆[1] 王继锁[2] 詹明生[3] 

机构地区：[1]湖北师范学院物理系,湖北黄石435002 [2]聊城大学物理系,山东聊城252059 [3]中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,湖北武汉430071

出　　处：《量子电子学报》2005年第3期396-401,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(10074072)湖北省高等学校科研基金资助项目(Z200522001)

摘　　要：研究了Kerr介质中初始处于纠缠态的两二能级原子与相干光场相互作用体系的压缩特性。通过数值计算,讨论了原子偶极间相互作用耦合常数和Kerr介质与单模腔场相互作甩的耦合强度对体系中的双原子偶极压缩和光场压缩的影响。结果发现在弱光场情况下,纠缠态原子偶极间相互作用和Kerr介质与光场作用越强,都使原子偶极振幅压缩现象从压缩状态退缩到无压缩状态;在强光场情况下,纠缠态原子偶极间相互作用越强,光场振幅压缩次数增多、振荡频率变慢; Kerr介质与光场作用越强,光场振幅压缩次数减少、振荡频率变快。The squeezing properties of a light-atom interacting system are studied by means of quantum theory. In the system, two two-level atoms are initially in an entangled state, and the coherent optical field in a Kerr medium is in a coherent state. Influence of the coupling constant ga of dipole-dipole interaction between atoms and the coupling strength x of the Kerr medium with the optical field on the double atoms dipole squeezing and optical field squeezing are discussed by numerical calculations. It is found that under weak optical field condition, large ga and x weaken the atomic dipole squeezing; and under strong optical field condition, large ga increases the optical field squeezing events while large x reduces the frequency.

关 键 词：量子光学 纠缠态原子 双原子偶极压缩 光场压缩 原子偶极间相互作用 KERR介质 

分 类 号：O431.2[机械工程—光学工程]