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

Abstract

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

CLC Number:

O431.2

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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