虚光场对玻色-爱因斯坦凝聚体与二项式光场相互作用系统中光场压缩性质的影响  

Influence of the virtual photon field on the squeezing properties of light field in the system of binomial state field interacting with atomic Bose-Einstein condensate

作　　者：赵建刚[1] 孙长勇[1] 梁宝龙[1] 苏杰[1] 

机构地区：[1]聊城大学物理科学与信息工程学院,聊城252059

出　　处：《物理学报》2009年第7期4635-4640,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10847143);山东省自然科学基金(批准号:Q2007A01)资助的课题~~

摘　　要：在二项式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,分别在旋波近似和非旋波近似下,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、光场参数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,光场压缩持续时间与原子的本征频率有关,压缩深度与二项式光场概率分布参数和虚光场有关,光场与原子的耦合系数决定了光场涨落的崩塌-回复频率.The squeezing properties of binomial state field interacting with Bose-Einstein condensate of two-level atoms are investigated within and without rotating-wave approximation by means of quantum theory. The influences of atomic eigenfrequency, the coupling constant between light field and atoms, the parameter of light field and the virtual photon field on squeezing properties have been discussed. The results show that two quadrature components can be squeezed periodically, and the duration of squeezing light has something to do with atomic eigenfrequency ω, and the degree of squeezing with the parameter of the binomial states field η and the virtual photon field. The frequency of light fluctuation＇s collapse and revival is determined by the coupling constant between light field and atoms.

关 键 词：量子光学 玻色-爱因斯坦凝聚 虚光场 光场压缩 

分 类 号：O431.2[机械工程—光学工程] O431[理学—光学]