二项式光场与二能级原子BEC相互作用系统中原子激光的量子性质  

Quantum properties of atomic:laser in system of binomial states field interacting with Bose-Einstein condensate of two-level atoms

作　　者：王磊[1] 孙长勇[1] 

机构地区：[1]聊城大学物理科学与信息工程学院,山东聊城252059

出　　处：《量子电子学报》2011年第5期571-576,共6页Chinese Journal of Quantum Electronics

基　　金：山东省自然科学基金资助项目(Y2008A23)

摘　　要：研究了二项式光场与二能级原子玻色-爱因斯坦凝聚(BEC)相互作用系统产生的原子激光的量子相关性质、压缩效应和振幅平方压缩效应。应用全量子理论,通过求解系统的海森堡方程,重点讨论了光场相关参数和原子相关参数对压缩深度、压缩频率的影响。结果表明,单模原子激光二阶相干度不随时间变化,原子激光具有周期性的压缩效应和振幅平方压缩效应,最大压缩深度由二项式光场相关参数决定,压缩频率依赖于原子与光场耦合系数,简要讨论了压缩效应和振幅平方压缩效应之间的区别和联系。The quantum correlation properties and squeezing properties of atomic laser are studied in the system of the binomial states field interacting with Bose-Einstein condensate of two-level atoms, and the amplitude-squared squeezing effects of atomic laser are also discussed. The influence of field parameter and atom parameter on the depth and duration of squeezing are mainly investigated by solving the Heisenberg equation based on the entire quantum theory. The results show that the quantum correlation properties of atomic laser keep invariant in the process of interaction between light and atomic BEC. The two quadrature components of atomic laser evolve periodically with time and can be squeezed. The depth of squeezing is determined by the binomial states field. The duration of squeezing depends on the coupling constant between light field and atoms. The relations and differences are briefly discussed between the squeezing effects and amplitude-squared squeezing effects.

关 键 词：量子光学 玻色-爱因斯坦凝聚 量子相关性 压缩效应 振幅平方压缩 

分 类 号：O431[机械工程—光学工程]