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Supersonic optical tunnels for Bose-Einstein condensates

S. Wuester·B. J. Dabrowska-Wuester
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Abstract

We propose a method for the stabilisation of a stack of parallel vortex rings in a Bose-Einstein condensate. The method makes use of a hollow laser beam containing an optical vortex. Using realistic experimental parameters we demonstrate numerically that our method can stabilise up to 9 vortex rings. Furthermore we point out that the condensate flow through the tunnel formed by the core of the optical vortex can be made supersonic by inserting a laser-generated hump potential. We show that long-living immobile condensate solitons generated in the tunnel exhibit sonic horizons. Finally, we discuss prospects of using these solitons for analogue gravity experiments.

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S. Wuester, B. J. Dabrowska-Wuester. 2007-07-10. Supersonic optical tunnels for Bose-Einstein condensates. https://doi.org/10.1088/1367-2630%2F9%2F4%2F085

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