Beyond-mean-field description of a trapped unitary Fermi gas with mass and population imbalance

TL;DR

This paper presents a comprehensive phase diagram for a mass- and population-imbalanced unitary Fermi gas using a self-consistent t-matrix approach, offering benchmarks for experimental and theoretical studies.

Contribution

It extends the mean-field description to include mass and population imbalance, providing quantitative phase transition benchmarks for trapped Fermi gases.

Findings

Phase diagram for imbalanced Fermi gases established

Guidelines for experimental heteronuclear Fermi mixture studies

Self-consistent t-matrix approach validated for these systems

Abstract

A detailed description is given of the phase diagram for a two-component unitary Fermi gas with mass and population imbalance, for both homogeneous and trapped systems. This aims at providing quantitative benchmarks for the normal-to-superfluid phase transition of a mass-imbalanced Fermi gas in the temperature-polarization parameter space. A self-consistent t-matrix approach is adopted, which has already proven to accurately describe the thermodynamic properties of the mass and population balanced unitary Fermi gas. Our results provide a guideline for the ongoing experiments on heteronuclear Fermi mixtures.