双磁阱中玻色凝聚气体干涉演化探测量子涡旋  

Detection of quantum vortex by interference of Bose-condensed gas in a double-well trap

作　　者：刘夏吟[1] 苏艳平[1] 徐志君[1] 

机构地区：[1]浙江工业大学应用物理系,浙江杭州310023

出　　处：《量子电子学报》2011年第3期313-317,共5页Chinese Journal of Quantum Electronics

基　　金：浙江省自然科学基金(Y6090620)资助项目

摘　　要：研究了两部分具有量子涡旋的玻色凝聚气体相干叠加时的干涉演化图样,并与没有涡旋的情况进行比较。研究发现,在涡旋态下,于涉条纹变得倾斜并且在涡旋核处条纹发生融合。根据干涉条纹的倾斜方向可判断涡旋的方向,由干涉图样在涡旋核处融合的条纹数可确定涡旋量子数。这种特殊的干涉结构图样为实验探测涡旋提供了有效的方法。The interference pattern between two freely expanding Bose-condensed gas with quantum vortex was studied and compared with the situation without vortex. The results show the interference fringes in vortex state tilt and merge at the location of vortex core. So the direction of vortex can be judged by the tilt direction of interference fringe, and the vortex quantum of circulation can be established by the number of merged fringes at the location of vortex core. This special interference pattern offers effective method in proving the existence of vortex experimentally .

关 键 词：量子光学 量子涡旋 干涉 玻色凝聚气体 双磁阱 

分 类 号：O431.2[机械工程—光学工程]