Topological phase transitions on a triangular optical lattice with non-Abelian gauge fields

TL;DR

This paper investigates topological quantum phase transitions in a Fermi gas on a triangular lattice influenced by non-Abelian gauge fields and Zeeman fields, revealing complex phase diagrams with gapped and gapless superfluids.

Contribution

It introduces a comprehensive mean-field analysis of topological phase transitions in a triangular lattice Fermi gas with non-Abelian gauge fields and Zeeman effects.

Findings

Identification of topological phase transitions between gapped and gapless superfluids.

Construction of ground-state phase diagrams showing rich topological phenomena.

Demonstration of the interplay between Zeeman fields and non-Abelian gauge fields in inducing phase changes.

Abstract

We study the mean-field BCS-BEC evolution of a uniform Fermi gas on a single-band triangular lattice, and construct its ground-state phase diagrams, showing a wealth of topological quantum phase transitions between gapped and gapless superfluids that are induced by the interplay of an out-of-plane Zeeman field and a generic non-Abelian gauge field.