Critical Trap Aspect Ratios For Dipolar BEC

Details Critical Trap Aspect Ratios For Dipolar BEC Critical Trap Aspect Ratios For Dipolar BEC

2010-12-24

arxiv.org/abs/1012.5392v1

Physics

Condensed Matter

Quantum Gases

Accepted for publication in EPJD

Scientific paper

We show that there exists critical trap aspect ratios for a trapped Bose-Einstein condensate with dipole-dipole interactions. We discuss the role of critical trap aspect ratios on both the critical angular velocity above which a vortex is energetically favorable and the precession velocity of an off-axis vortex in TF regime. We show that the stability diagram for a purely dipolar gas depends crucially on the critical trap aspect ratios both for positive and negative strength of dipolar interaction. We prove that the critical points can be changed by an anharmonic potential.

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