Supersonic optical tunnels for Bose-Einstein condensates

Details Supersonic optical tunnels for Bose-Einstein condensates Supersonic optical tunnels for Bose-Einstein condensates

2006-02-05

arxiv.org/abs/cond-mat/0602108v3

New Journal of Physics, 9 (2007) 85

Physics

Condensed Matter

Other Condensed Matter

14 pages, 3 figures, published version

Scientific paper

10.1088/1367-2630/9/4/085

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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