Kerr介质腔中非关联双模热光场与V型三能级原子相互作用中的场关联特性  

Correlation Properties of the Field in the System of Uncorrelated Two-mode Thermal Field Interacting with V-type Three-level Atom in Kerr Medium Cavity

作　　者：赖振讲[1] 冯少康[1] 许曼[1] 贺树芳[1] 

机构地区：[1]河南师范大学物理与信息工程学院

出　　处：《量子光学学报》2009年第1期27-31,共5页Journal of Quantum Optics

基　　金：河南省自然科学基金(No.0511010600);河南省教育厅自然科学基金(No.2006140005)

摘　　要：研究了Kerr介质腔中非关联双模热光场与V型三能级原子相互作用过程中的场关联特性。通过数值计算和图形分析,讨论了平均光子数、Kerr介质、失谐量以及耦合系数对场的关联特性的影响。结果发现:当V型三能级原子与两模光场发生相互作用时,非关联双模热光场将发生关联,且关联强度与耦合强度、失谐量和Kerr系数有关。当两模热光场和裸原子发生对称相互作用时,两模光场始终处于正关联;增加一模光场的平均光子数,两模光场的关联减弱;Kerr介质和失谐量的增加将削弱两模场的关联;当两模光场与原子发生不对称相互作用时,假设g1>g2,两模光场的关联特性在正关联和反关联之间交替出现。保持场一模的平均光子数不变,增加场另一模的平均光子数,反关联特性消失。The correlation properties of the uncorrelated two-mode thermal field during their interaction with V-type three-level atom in the Kerr medium cavity is studied. By numerical calculation and graphic analysis, the influences of the Kerr medium, the detuning, mean photon number and coupling constant on correlation property are discussed. The result shows that; when the V-type three-level atom is interacting with initial uncorrelated two-mode thermal field, the correlation of the two-mode field will take place and the correlation intensity of the fields depends on the coupling strength, the detuning and the Kerr medium; when the two- mode thermal field interacts with nude atom symmetrically, the two-mode field is always positive correlative; with the mean photon number of one mode increasing, the correlation intensity of the field will decrease; the enhancing of Kerr medium and detuning will reduce the correlation intensity of the fields; when the two-mode thermal field interacts with nude atom nonsymmetrically, without loss of generality, supposed g1〉 g2, the property of correlation appears alternately between correlation and anti-correlation; when the mean photon number of one mode remains unchanging and the mean photon number of the other mode increases, anticorrelation will disappear.

关 键 词：非关联双模热光场 V型三能级原子 关联函数 

分 类 号：O431[机械工程—光学工程]