Rotational properties of non-dipolar and dipolar Bose-Einstein condensates confined in annular potentials

TL;DR

This paper explores how Bose-Einstein condensates, both dipolar and non-dipolar, respond to rotation in an annular trap, highlighting vortex formation and the effects of dipole orientation.

Contribution

It provides a comparative analysis of rotational behaviors in non-dipolar and dipolar BECs, including the influence of dipole orientation on vortex formation.

Findings

Identification of critical rotational frequencies for vortex formation in non-dipolar BECs.

Demonstration of the impact of dipole orientation on the rotational response of dipolar BECs.

Analysis of how dipolar interactions modify vortex dynamics in annular potentials.

Abstract

We investigate the rotational response of both non-dipolar and dipolar Bose-Einstein condensates confined in an annular potential. For the non-dipolar case we identify certain critical rotational frequencies associated with the formation of vortices. For the dipolar case, assuming that the dipoles are aligned along some arbitrary and tunable direction, we study the same problem as a function of the orientation angle of the dipole moment of the atoms.