摘要
讨论了冷原子与激光场的互作用系统,对于碱金属原子例如^6Li与激光场互作用系统,通过恰当的光场参数配置,构造出具二重兼并的能量本征态,可以分别定义两个简并态为自旋向上及自旋向下态,类似于自旋二分量体系。进一步研究发现,不同自旋态将感受到自旋相关的光致规范场。当原子在设定的空间分布激光场中运动时,其所感受到的有效自旋相关规范场将导致自旋霍尔效应,并产生可观测的自旋霍尔流。
The dynamics of cold atoms interacting with external laser fields is investigated. For multilevel atoms interacting with external laser fields, e.g.,^6Li, two-fold degenerate dressed states are obtained under appropriate parameters configuration, which may be defined as spin-up and spin-down in analogy with the ,spin-1/2 charged system. Further analysis shows that different spin states will feel spin-dependent gauge fields. When the cold atoms move in spatially varying laser fields, the effective spin-dependent gauge potential will lead to spin Hail effects as well as observable spin Hall currents.
出处
《量子电子学报》
CAS
CSCD
北大核心
2009年第2期187-192,共6页
Chinese Journal of Quantum Electronics
基金
中国博士后基金(20070410838)
关键词
量子光学
量子自旋霍尔效应
规范场
冷原子
quantum optics
quantum spin Hall effect
gauge potential
ultracold atoms