与双模SU(2)相干场相互作用的Λ型三能级原子系统中光场的位相特性和原子的相干捕获  

Phase Properties of the Field and Atomic Coherent Trapping in a System of A-type Three-level Atom interacting With Two-mode SU(2) Coherent Field

作　　者：郭红[1] 彭金生[1] 

机构地区：[1]华中师范大学物理系,武汉430079

出　　处：《量子电子学报》2001年第3期255-260,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金资助课题(19774024).

摘　　要：本文研究了与双模ＳＵ（２）相干场相互作用的Λ型三能级原子系统中光场位相的动态特性，证明了光场每个模的位相及两个模的位相和均保持随机分布，给出了光场两个模位相差的平均值及方差表达式，探讨了系统初态及原子－光场耦合强度对光场两个模位相差涨落的影响，并揭示了在适当的条件下，系统呈现原子的相干捕获现象．In this paper, the phase properties of two-mode SU(2) coherent field interacting with A-type three-level atom are investigated. We find that single-mode phase and the sum of the two-mode phase are all randomly distributed. The expressions of average value and variance of the phase difference are presented. The effects of atomic initial state and the atom-field coupling strengths on the variance of the phase difference are examined. That the atomic coherent trapping will be taken place under an appropriate condition is verified.

关 键 词：光场 位相特性 三能级原子系统 相干捕获 双模相干场 

分 类 号：O431.2[机械工程—光学工程]