与回音壁模式微腔耦合两氮空缺中心的纠缠动力学  

Entanglement Dynamics of Two Nitrogen-vacancy Centers Coupling to a Whispering-gallery Microcavity

作　　者：刘思平[1] 朱丽娟[1] 

机构地区：[1]湖北文理学院物理与电子工程学院,湖北襄阳441053

出　　处：《绵阳师范学院学报》2016年第11期17-22,共6页Journal of Mianyang Teachers＇ College

基　　金：湖北省教育厅科学技术研究计划重点项目(D20152602)

摘　　要：量子纠缠在许多不同的系统已实现,本文提出了一个金刚石晶体中与回音壁模式(WGM)微腔耦合的两氮空缺(NV)中心之间产生纠缠的模型.通过求解对应的主方程,分析了两NV中心的纠缠Concurrence(C).结果显示,系统参数,如两NV中心与微腔之间的频率失谐量和共振模之间的耦合强度对纠缠的产生起到了积极的作用;在某种程度上,高纠缠可以在合适的时刻产生,因为这些系统参数可以在一定程度上补偿由腔泄露和NV中心自发辐射引起的损耗.同时,表明不同的初态能改变纠缠的最大值,但不能改变纠缠的曲线变化形式.We present a model to generate the entanglement between two nitrogen -vacancy （NV） centers in diamond nanocrystal coupled to a whispering - gallery - mode （WGM） microcavity. The entanglement concur- rence C of two NV centers is discussed by solving the corresponding master equation. The results show that the system parameters such as the frequency detuning between NV center and microcavity and the coupling strength between resonator modes play a positive role in generating entanglement of two NV centers. We find, to some ex- tent, that high entanglement can be created at appropriate times because these system parameters can compensate for the dissipation caused by cavity leakage and the spontaneous emission of the NV centers to some extent. We also show that different initial state can change the maximal entanglement but not alter the profile of the curve of the entanglement.

关 键 词：量子纠缠 量子电动力学 氮空缺中心 回音壁模型微腔 

分 类 号：O413.2[理学—理论物理]