Λ型和V型三能级原子与耦合腔相互作用系统中场的量子特性  

Quantum properties of the field in the system of a Λ-type atom and a V-type atom trapped in two distant cavities connected by an optical fiber

作　　者：吴道永[1] 

机构地区：[1]武夷学院实验室管理中心,福建武夷山354300

出　　处：《光学技术》2012年第4期497-501,共5页Optical Technique

基　　金：福建省自然科学基金资助项目(2011J01018)

摘　　要：研究了能级结构分别为Λ型三能级和V型三能级结构的两个原子和通过光纤耦合的由双模腔构成的复合系统中光场的压缩效应、二阶相干度和亚泊松分布等量子特性。利用数值计算方法讨论了光纤模与腔场间的耦合强度对量子特性的影响。研究结果表明:双模光场不呈现压缩效应,但呈现出反关联和亚泊松分布的量子特性;随着光纤模与腔场间耦合强度的增强,亚泊松分布减弱。A system consisting of a ∧-type atom and a V-type atom is studied, which are individually trapped in two spatially separated two modes cavities that are connected by an optical fiber. The evolution of the state vector of the sys- tem is given. The squeezing, second-order correlation function and the photon number statistical distribution of field are investigated in cavity A. The influences of cavity-fiber coupling coefficient on the photon number statistical distribution of field are discussed. The results show that the field does not display squeezing effect, but it displays sub-Poissonian distri- bution and anticorrelation between the two modes. On the other hand, the sub-Poissonian distribution is weakened with increasing of the cavity-fiber coupling coefficient.

关 键 词：量子光学 原子一腔一光纤复合系统 三能级原子 量子特性中圈分类号:O431.2 

分 类 号：O431.2[机械工程—光学工程]