Phase diagram of a rapidly-rotating two-component Bose gas

TL;DR

This paper analytically derives the phase diagram of a two-component Bose gas in an anharmonic trap, revealing continuous transitions between vortex states, with results becoming exact in the weak interaction and small anharmonicity limit.

Contribution

It provides a universal and exact analytical phase diagram for a two-component Bose gas under specific conditions, highlighting the nature of vortex state transitions.

Findings

Transitions between vortex states are continuous.

Results are exact in the weak interaction and small anharmonicity limit.

The phase diagram is universal for the specified conditions.

Abstract

We derive analytically the phase diagram of a two-component Bose gas confined in an anharmonic potential, which becomes exact and universal in the limit of weak interactions and small anharmonicity of the trapping potential. The transitions between the different phases, which consist of vortex states of single and multiple quantization, are all continuous because of the addition of the second component.