纳米光纤腔中腔长诱导的相干动力学  

Coherent Dynamics Induced by the Cavity Length in the Nanofiber Cavity

作　　者：张鸿宇 俞立先[3] 汪丽蓉[1,2] 

机构地区：[1]山西大学激光光谱研究所,量子光学与光量子器件国家重点实验室,山西太原030006 [2]山西大学极端光学协同创新中心,山西太原030006 [3]绍兴文理学院物理系,绍兴312000

出　　处：《山西大学学报（自然科学版）》2017年第4期781-788,共8页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(61575116);国家自然科学基金(61378049)

摘　　要：研究纳米光纤腔中光与二能级原子相互作用的相干动力学,该系统具有一个独特的特性:通过控制腔长将产生超强的光与原子相互作用。为了正确描述系统的相干动力学,首先推导出适合弱、强甚至超强相互作用下的Lindblad量子主方程。在此基础上,通过数值方法讨论了原子布居数、平均光子数和二阶关联函数。由于新得到的主方程考虑了反旋波作用,发现长时动力学和二阶关联展现出与传统主方程不一样结果。We investigate the coherent dynamics of the interaction between the photon and two-level atom in the nanofiber cavity,and this system has a distinct property that the ultrastrong photon-atom interaction can be generated by controlling the cavity length. In order to correctly describe the systematic dynamics, we first derive a generalized Lindblad equation, which is valid for the weak, strong and evenultrastrong photon-atom interaction. Based on this equation, the atom population, mean-photon number, and secondorder correlated function are calculated numerically. Since the derived Lindblad equation consider the role of the counterrotating terms, the long-time coherent dynamics and second-order correlation exhibit differ- ent behaviors obtained in the conventional Lindblad equation.

关 键 词：纳米光纤腔 超强耦合 量子主方程 

分 类 号：O431[机械工程—光学工程]