Connection between rotation and miscibility in a two-component Bose-Einstein condensate

TL;DR

This paper explores how the rotation and miscibility of a two-component Bose-Einstein condensate in a toroidal trap influence each other, revealing controllable circulation quantization and diverse dynamical behaviors.

Contribution

It demonstrates the control of circulation quantization via miscibility adjustments using Feshbach resonance in a rotating two-component BEC.

Findings

Circulation quantization depends on the density distribution of each component.

Changing miscibility alters the topological constraints and dynamics.

The system exhibits diverse behaviors depending on initial angular momentum.

Abstract

A two-component Bose-Einstein condensate rotating in a toroidal trap is investigated. The topological constraint depends on the density distribution of each component along the circumference of the torus, and therefore the quantization condition on the circulation can be controlled by changing the miscibility using the Feshbach resonance. We find that the system exhibits a variety of dynamics depending on the initial angular momentum when the miscibility is changed.