虚光场对光场与玻色-爱因斯坦凝聚体相互作用系统中光场压缩性质的影响(英文)  

Influence of the virtual photon feild on the squeezing properties of light field interacting with bose-einstein condensate

作　　者：赵洪卫[1] 邵凤兰[1] 

机构地区：[1]曲阜师范大学物理工程学院,曲阜273100

出　　处：《原子与分子物理学报》2010年第2期305-310,共6页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10775089,10475049);2008年科技发展计划项目

摘　　要：在压缩真空态光场和二能级原子玻色-爱因斯坦凝聚体相互作用系统中,应用全量子理论,采用非旋波近似,研究了光场的压缩特性以及原子本征频率、原子-光场的耦合系数、光场初始压缩因子以及虚光场对系统光场压缩特性的影响.研究表明,光场的两个正交分量均被周期性压缩,其压缩深度与光场初始压缩因子有关,光场与原子的耦合系数决定了光场的量子崩塌-回复频率,虚光场效应使得光场的压缩深度增强.The squeezing properties of light field are investigated without rotating-wave approximation in the system of light field interacting with two-level atomic Bose-Einstein condensate. We discuss the influences of atomic eigenfrequency, interaction intensity between light field and atoms, squeeze factor of light field and virtual photon field on the squeezing properties. The results show that two quadrature components of light field can be squeezed periodically. The degree of squeezing light field have something to do with the initial squeeze factor of light field. The collapse and revival frequency of light field fluctuation depends on interaction intensity between light field and atoms. The effect of virtual photon field deepens the depth of squeezing light field.

关 键 词：量子光学 玻色-爱因斯坦凝聚 虚光场 压缩真空态 

分 类 号：O431.2[机械工程—光学工程]