与Λ型原子互作用的二项式光场的量子特性  

Quantum properties of the binomial states field interacting with a Λ-type three-level atom

作　　者：崔英华[1] 萨楚尔夫[1] 宫艳丽[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院,内蒙古呼和浩特010022

出　　处：《量子电子学报》2008年第3期333-339,共7页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(60467002);内蒙古自治区自然科学基金(200408020107

摘　　要：运用全量子理论,研究了Λ型三能级原子与二项式光场相互作用过程中光场的量子特性;讨论了Λ型三能级原子初始状态和二项式光场系数对光场压缩和二阶相干度特性的影响。在选择较小的原子失谐量γ和二项式光场系数η时,光场表现为光子聚束效应和反聚束效应交替出现,若上述参量较大时,光场呈现完全的反聚束效应;适当选取Δ和η,在一定时域内耦合系统光场的X_1分量将呈现出压缩效应。表明二项式光场与Λ型三能级原子作用时,光场在一定条件下将处于压缩态,且可呈现出持续的反聚束特性。The quantum properties of light in the system of ∧-type three -level atom interacting with radiation fields in binomial states axe studied by means of quantum theory. The influences of the initial states of the ∧-type three-level atom and the parameter of the binomial optical fields on squeezing of the optical field and the second-order coherence degree are investigated in detail. As the detuning paxameter of atom Δ and the parameter of the binomial optical field η axe small, bunching and antibunching effect can be exhibited alternatively. With the increase of the parameters, the light field shows antibunching effect completely. If the detuning parameter of atom Δ and the parameter η axe chosen appropriately, the component X1 of the light field in the coupling system will be squeezed during the certain time. The results indicate that the light field shows squeezing effects and continuous antibunching effect under a certain condition as it interactes with a ∧-type three -level atom.

关 键 词：量子光学 压缩 光场压缩 反聚束效应 型三能级原子 二项式态 

分 类 号：O431.2[机械工程—光学工程]