非线性原子-腔-光纤系统中的量子关联转移和量子态传输  

Non-classical correlations and quantum state transfer in nonlinear atom-cavity-fiber system with Kerr medium

作　　者：贺启亮[1] 丁敏 宋晓书[1] 肖勇军[1] 吕兵[1] HE Qiliang;DING Min;SONG Xiaoshu;XIAO Yongjun;LYU Bing(School of Physics and Electronics,Guizhou Normal University,Guiyang 550001,China)

机构地区：[1]贵州师范大学物理与电子科学学院,贵阳贵州550001

出　　处：《量子电子学报》2021年第3期382-392,共11页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金,11364006,11264008;贵州省科技计划项目,黔科合LH字[2017] 7343;贵州师范大学博士基金;贵州省普通高等学校低维凝聚态物理重点实验室项目,黔教合KY字[2016]002。

摘　　要：在光腔被非线性克尔介质充满的原子-腔-光纤系统中,研究了非线性克尔介质对于不同原子系综之间量子态传输和非经典关联(量子纠缠,量子失谐)转移的影响。结果表明非线性克尔介质能够增加目标原子系综间量子态的保真度和非经典关联的数值,减缓保真度和量子关联衰减的速率,从而延长量子态传输和非经典关联转移存在的时间。此外,利用迹距离的度量方法研究了非线性克尔介质对于系统中量子信息流动的影响,发现非线性克尔介质能够减小迹距离衰减的速率,减缓目标原子系综中量子信息的流出,并增加其量子信息存储的时间。The influence of nonlinear Kerr medium on non-classical correlations and quantum state transfer in an atom-cavity-fiber system with a cavity filled with nonlinear Kerr medium are investigated.Results show that Kerr medium can increase the amount of non-classical correlations and the fidelity of quantum state transfer,and slow down the decay rate of non-classical correlations and fidelity,which means that the time of non-classical correlation and quantum state transfer can be prolonged by adjusting Kerr medium.Furthermore,how Kerr medium affects the transfer of quantum information in the system is also explored by making use of the trace distance.It is found that the decay rate of trance distance can be reduced by Kerr medium,and the flow of quantum information can be suppressed as well,which indicates that the storage time of quantum information between target atoms can be increased.

关 键 词：量子光学 原子-腔-光纤系统 非线性克尔介质 非经典关联 量子态传输 

分 类 号：O431.2[机械工程—光学工程]