非简并双光子Jaynes-Cummings模型中贝尔非定域性的演化  

Dynamics of Bell nonlocality in non-degenerate two-photon Jaynes-Cummings model

作　　者：廖长庚[1] 陈子翃[1] 罗成立[1] 

机构地区：[1]福州大学物理与信息工程学院,福州350002

出　　处：《物理学报》2010年第12期8526-8534,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10974028);福建省自然科学基金(批准号:2009J06002)资助的课题~~

摘　　要：基于赝自旋算符的关联所对应的贝尔算符期待值,研究了各种双模非经典态(纠缠相干态、对相干态以及双模压缩真空态)在非简并双光子Jaynes-Cummings模型中贝尔非定域性的动力学特性.结果表明:对于纠缠相干态,贝尔非定域性的演化与双模场平均光子数的大小息息相关;对于对相干态和双模压缩真空态,贝尔非定域性会在有限的时间内完全消失,之后又基本上复原到初始值,呈现出周期性振荡现象.We investigate quantum nonlocality dynamics of a three-level atom and a class of two-mode non-classical states（including the entangled coherent state,the pair coherent state and the two-mode squeezed state） in the non-degenerate two-photon Jaynes-Cummings model.It is shown that the time evolution of the Bell nonlocality for the case of the entangled coherent state is closely related to the average number of photons in the two-mode field.For the cases of the pair coherent state and the two-mode squeezed state,the effect of Bell nonlocality sudden death is demonstrated,and the absolute value of the 〈BCHSH〉exhibits exact periodic collapses and revivals.

关 键 词：赝自旋算符 双模腔场 非简并双光子Jaynes-Cummings模型 贝尔非定域性 

分 类 号：O431.2[机械工程—光学工程]