Rotational states of Bose gases with attractive interactions in anharmonic traps

TL;DR

This paper investigates how attractive Bose gases in anharmonic traps respond to rotation, revealing behaviors like center-of-mass motion or vortex formation that differ from harmonic traps.

Contribution

It demonstrates the distinct rotational responses of attractive Bose gases in anharmonic traps, highlighting the influence of trap anharmonicity and interaction strength.

Findings

Bose gases exhibit center-of-mass motion under rotation in anharmonic traps.

Vortex formation occurs depending on interaction and trap parameters.

Behavior differs significantly from harmonic trap scenarios.

Abstract

A rotated and harmonically trapped Bose gas with attractive interactions is expected to either remain stationary or escape from the trap. Here we report that, on the contrary, in an anharmonic trapping potential the Bose gas with attractive interactions responds to external rotation very differently, namely through center-of-mass motion or by formation of vortices, depending on the strengths of the interaction and the anharmonic term in the trapping potential.