Vortex Dipole in a BEC with dipole-dipole interaction

TL;DR

This paper investigates how dipolar interactions in an oblate Bose-Einstein condensate influence vortex dipole formation, revealing that such interactions lower the critical velocity needed for vortex nucleation.

Contribution

It provides the first calculation of the critical velocity for vortex dipole formation in a dipolar BEC, highlighting the impact of dipolar interactions.

Findings

Dipolar interactions decrease the critical velocity for vortex nucleation.

The study focuses on single and multiply charged vortex dipoles in an oblate BEC.

Results are derived within the Thomas-Fermi regime.

Abstract

We consider single and multiply charged quantized vortex dipole in an oblate dipolar Bose Einstein condensate in the Thomas-Fermi (TF) regime. We calculate the critical velocity for the formation of a pair of vortices of opposite charge. We find that dipolar interactions decrease the critical velocity for a vortex dipole nucleation.