Phase separation in a polarized Fermi gas at zero temperature

TL;DR

This paper explores the phase diagram of polarized Fermi gases at zero temperature, identifying various phase-separated states through quantum Monte Carlo simulations, advancing understanding of quantum phase behavior in fermionic systems.

Contribution

It provides a detailed phase diagram of asymmetric Fermi gases at zero temperature, revealing three distinct phase-separated states using quantum Monte Carlo methods.

Findings

Identification of three phase-separated states

Quantitative phase boundaries determined

Enhanced understanding of fermionic superfluidity

Abstract

We investigate the phase diagram of asymmetric two-component Fermi gases at zero temperature as a function of polarization and interaction strength. The equations of state of the uniform superfluid and normal phase are determined using quantum Monte Carlo simulations. We find three different mixed states, where the superfluid and the normal phase coexist in equilibrium, corresponding to phase separation between: (a) the polarized superfluid and the fully polarized normal gas, (b) the polarized superfluid and the partially polarized normal gas and (c) the unpolarized superfluid and the partially polarized normal gas.