对双模反关联光场非经典特性的远程控制  

Remote Control of the Nonclassical Properties of Two-mode Anti-correlated Light Fields

作　　者：郑乃清[1] 

机构地区：[1]宁德师范学院物理与电气工程系,福建宁德352100

出　　处：《量子光学学报》2012年第2期109-114,共6页Journal of Quantum Optics

基　　金：福建省教育厅科技项目(JB11192);宁德师范学院科研基金(2009J002)

摘　　要：考虑初始处于纠缠态的两个V型三能级原子之一注入腔场中,并且与初始处于SU(2)相干态的双模场发生共振相互作用的情况。采用数值计算方法研究了双模关联场的非经典特性。讨论了对腔外原子选择性测量、双模总光子数和配分参量对双模关联场的差压缩、柯西-施瓦茨(Cauchy-Schwarz)不等式、模间相干性以及光子亚泊松(sub-Poisson)分布的影响。研究结果表明:对腔外原子的选择性测量或增加两模的总光子数,a模的差压缩和光子sub-Poisson分布都明显地增强,但两模之间的反相关明显地减弱。We consider the case that one of the two initially entangled V-type three-level atoms is injected into a two-mode cavity and resonantly interacting with a two-mode field initially in a SU(2) coherent state.Nonclassical properties of the two-mode correlated field are investigated numerically.The influences of the state-selective measurement of the atom outside the cavity,the total photon number of the two modes,and the partition parameter on the difference squeezing,the Cauchy-Schwarz inequality,the mode-correlation properties,and the photon number distribution are discussed.The results indicate when the state-selective measurement is performed on the atom outside the cavity or the total photon number is increased,the difference squeezing and the sub-Poisson distribution of the photon number of mode a is distinctly enhanced,but the anti-correlation between the two modes is distinctly reduced.

关 键 词：量子光学 SU(2)相干态场 V型三能级原子 选择原子测量 非经典特性 

分 类 号：O431[机械工程—光学工程]