Berry's Phase Induced Bose-Einstein condensation into a Vortex State

M. Olshanii; M. Naraschewski

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arXiv · cond-mat/9811314

Berry's Phase Induced Bose-Einstein condensation into a Vortex State

M. Olshanii·M. Naraschewski

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Abstract

The existence of a geometric phase in magnetic traps can be used to Bose condense a magnetically trapped atomic gas into a vortex state. We propose an experimental setup where a magnetic trap together with a blue detuned laser beam form a multiply connected trap geometry. The local variation of the magnetic quantization axis induces a geometric or Berry's phase that allows the atoms to acquire an effective gauge charge interacting with the analog of a magnetic solenoid. It is shown that the ground state of such a system may be given by a vortex state. We also discuss the influence of atomic interactions on the proposed vortex production scheme in the context of present Bose-Einstein condensation experiments with dilute gases.

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M. Olshanii, M. Naraschewski. 1998-11-23. Berry's Phase Induced Bose-Einstein condensation into a Vortex State. https://arxiv.org/abs/cond-mat/9811314

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