Persistent currents in dipolar Bose-Einstein condensates confined in annular potentials

TL;DR

This paper studies the stability of persistent currents in dipolar Bose-Einstein condensates confined in annular traps, focusing on how dipole orientation and interaction strength affect system stability against collapse and current persistence.

Contribution

It introduces an analysis of how dipole orientation and hard-core interactions influence stability and persistent currents in dipolar BECs within annular potentials.

Findings

Stability depends on dipole orientation and interaction strength.

Persistent currents can be maintained or destabilized based on system parameters.

System stability against collapse varies with dipole alignment.

Abstract

We consider a dipolar Bose-Einstein condensate confined in an annular potential, with all the dipoles being aligned along some arbitrary direction. In addition to the dipole-dipole interaction, we also assume a zero-range hard-core potential. We investigate the stability of the system against collapse, as well as the stability of persistent currents as a function of the orientation of the dipoles and of the strength of the hard-core interaction.