Phase transition from straight into twisted vortex-lines in dipolar Bose-Einstein condensates

Details Phase transition from straight into twisted vortex-lines in dipolar Bose-Einstein condensates Phase transition from straight into twisted vortex-lines in dipolar Bose-Einstein condensates

2009-02-18

arxiv.org/abs/0902.3058v1

New J. Phys. 11, 055012 (2009), (Part of "Focus on Cold and Ultracold Molecules")

Physics

Condensed Matter

Other Condensed Matter

11 pages, 6 figures, Accepted for publication in New J. Phys

Scientific paper

10.1088/1367-2630/11/5/055012

The non-local non-linearity introduced by the dipole-dipole interaction plays a crucial role in the physics of dipolar Bose-Einstein condensates. In particular, it may distort significantly the stability of straight vortex lines due to the rotonization of the Kelvin-wave spectrum. In this paper we analyze this instability showing that it leads to a second-order-like phase transition from a straight vortex-line into novel helical or snake-like configurations, depending on the dipole orientation.

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