双磁阱中玻色凝聚气体干涉演化探测量子涡旋

J4 ›› 2011, Vol. 28 ›› Issue (3): 313-317.

双磁阱中玻色凝聚气体干涉演化探测量子涡旋

刘夏吟,苏艳平,徐志君

浙江工业大学应用物理系，浙江杭州 310023

收稿日期:2010-04-12 修回日期:2010-07-01 出版日期:2011-05-28 发布日期:2011-05-20
通讯作者: 徐志君（1963-），教授，硕士，主要从事原子光学方面的研究。 E-mail:xzj@zjut.edu.cn
作者简介:刘夏吟（1981-），女，硕士，主要从事原子光学方面的研究。E-mail: lmmgood0912@126.com
基金资助:
浙江省自然科学基金(Y6090620)

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

LIU Xia-yin, SU Yan-ping, XU Zhi-jun

Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310032, China

Received:2010-04-12 Revised:2010-07-01 Published:2011-05-28 Online:2011-05-20
Contact: E-mail:xzj@zjut.edu.cn

摘要/Abstract

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，干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上探测涡旋提供了有效的方法。

关键词: 量子光学, 量子涡旋, 干涉, 玻色凝聚气体, 双磁阱

Abstract:

The interference pattern between two freely expanding Bose-condensed gas with vortex has been studied, and compared with the situation without vortex. The results show the interference fringes in vortex state tilt and merge at the location of the vortex core. So the direction of vortex can be judged by the tilt direction of interference fringe, and the quantum of circulation of vortex 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.

Key words: quantum optics, quantum vortex Interference, Bose-condensed gas, Double-well trap

中图分类号:

O431.2

刘夏吟苏艳平徐志君. 双磁阱中玻色凝聚气体干涉演化探测量子涡旋[J]. J4, 2011, 28(3): 313-317.

LIU Xia-yin, SU Yan-ping, XU Zhi-jun. Detection of quantum vortex by interference of Bose-condensed gas in a double-well trap[J]. J4, 2011, 28(3): 313-317.

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