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

Abstract

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.

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

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• Quantum structural phase transition in chains of interacting atoms
• Vortex dynamics of rotating dipolar Bose-Einstein condensates
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• From classical to quantum criticality
• Internal structure and stability of vortices in a dipolar spinor Bose-Einstein condensate
• Excitations of a vortex line in an elongated dipolar condensate
• Spin rotons and supersolids in binary antidipolar condensates
• Off-axis Vortex in a Rotating Dipolar Bose-Einstein Condensation
• Effect of optical lattice potentials on the vortices in rotating dipolar Bose-Einstein condensates
• Vortex pair dynamics in three-dimensional homogeneous dipolar superfluids
• Crow instability of vortex lines in dipolar superfluids