Mean-field yrast spectrum of a two-component Bose gas in ring geometry: persistent currents at higher angular momentum

TL;DR

This paper analyzes the mean-field yrast spectrum of a two-component Bose gas in ring geometry using analytic soliton solutions, revealing complex structures influenced by interactions and population imbalance, with implications for persistent currents at higher angular momenta.

Contribution

It provides a detailed analytical study of the yrast spectrum in a two-component Bose gas, highlighting new features due to interactions and population imbalance.

Findings

Rich spectrum structure due to interactions and imbalance

Persistent currents possible at higher angular momenta

Analytic soliton solutions used for spectrum analysis

Abstract

We use analytic soliton solutions of a two-component Bose gas in ring geometry to analyze the mean-field yrast spectrum of the system. We find that the spectrum exhibits a surprisingly rich structure as a result of the interplay of interparticle interactions and population imbalance. We discuss the implication of these results in regard to the possibility of persistent currents at higher angular momenta.