冷原子中的光致量子自旋Hall效应  

LIGHT-INDUCED SPIN HALL EFFECTS IN COLD ATOMS

作　　者：张新定[1] 高宗壬[1] 

机构地区：[1]华南师范大学物理与电信工程学院

出　　处：《华南师范大学学报（自然科学版）》2008年第4期59-62,共4页Journal of South China Normal University(Natural Science Edition)

基　　金：中国博士后第39批科研经费资助项目

摘　　要：讨论在冷原子体系中利用光致规范场模拟量子自旋霍尔效应.通过对6Li这样的多能级原子施加适当的激光脉冲,构造出具二重兼并的能量暗态(能量为零的本征态).类似于自旋二分量体系,可以分别定义2个暗态为自旋向上及自旋向下态.当原子在空间分布的激光场中运动时,其所感受到的有效自旋相关规范场将导致可观测的自旋霍尔电流.In this paper, the spin Hall effects induced by gauge fields is presented in cold atoms. For multi - level atoms interacting with external laser fields, e.g. , ^6Li, two - fold degenerate dressed states can be obtained under appropriate parameters configuration, which are defined as spin -up and spin -down in analogy with the spin -1/2 charged system. When the cold atoms moving in a spatially varying laser field, the effective spin -dependent gauge potential will lead to observable spin Hall currents that indicates the spin Hall effects.

关 键 词：冷原子 规范场 量子自旋霍尔效应 

分 类 号：O413[理学—理论物理]