原子偶极压缩的相干控制和Cauchy-Schwarz不等式的破坏  

Coherent control of atom dipole squeezing and violation of Cauchy-Schwarz inequality

作　　者：赵加强[1] 逯怀新[1] 

机构地区：[1]潍坊学院物理与电子科学系,山东省多光子纠缠与操纵重点实验室,潍坊261061

出　　处：《物理学报》2010年第11期7875-7879,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60878001);潍坊学院博士科研基金(批准号:2009BS01)资助的课题~~

摘　　要：通过研究孤立二能级原子与双模纠缠相干光场的相互作用,分析了体系中原子偶极压缩量子效应的时间演化规律.体系中作用场模的性质决定了原子偶极压缩程度;同时定义了体系的Cauchy-Schwarz不等式破坏参数ΔV,研究了不同条件下参数ΔV的时间演化特性,Cauchy-Schwarz不等式破坏程度和体系中所具有的非经典特性是一致的;即可以通过调控相干场参数来远程控制体系中的非经典特性.By studying the interaction of isolated two-level atom with two-mode entangled coherent state optical field,the time evolution of dipole squeezing quantum effect in the system is investigated in detail.The results show that the properties of interaction coherent mode determine the degree of atom dipole squeezing.Parameter ΔV of violation of Cauchy-Schwarz inequality of the interaction system is defined.Time evolution of parameter ΔV is studied,and it can be seen evidently from the results that the degree of violation of Cauchy-Schwarz inequality accords with the nonclassical property of interaction system.Through tuning the parameter of the coherent field,we can easily perform the remote control of the noncommercial properties.

关 键 词：量子光学 双模纠缠相干态 偶极压缩效应 CAUCHY-SCHWARZ不等式 

分 类 号：O431.2[机械工程—光学工程]