Superfluid phase diagrams of trapped Fermi gases with population imbalance

TL;DR

This paper maps out the phase diagrams of trapped Fermi gases with population imbalance near unitarity, highlighting transition temperatures, regimes, and experimental signatures, with novel predictions on the BCS side.

Contribution

It provides detailed phase diagrams and identifies experimental signatures, including unexpected behaviors on the BCS side, advancing understanding of imbalanced Fermi superfluids.

Findings

Quantitative superfluid transition temperature values

Identification of transition lines between regimes

Predictions of unexpected behaviors on the BCS side

Abstract

We present phase diagrams for population imbalanced, trapped Fermi superfluids near unitarity. In addition to providing quantitative values for the superfluid transition temperature, the pairing onset temperature and the transition line (separating the Sarma and phase separation regimes), we study experimental signatures of these transitions based on density profiles and density differences at the center. Predictions on the BCS side of resonance show unexpected behavior, which should be searched for experimentally.