The pseudogap regime in the unitary Fermi gas

TL;DR

This paper reviews the pseudogap regime in the unitary Fermi gas, emphasizing AFMC calculations and comparing theoretical results with experimental data to understand pairing phenomena.

Contribution

It provides a comprehensive analysis of the pseudogap in the unitary Fermi gas using AFMC, highlighting new computational insights and comparisons with experiments.

Findings

AFMC results for heat capacity and pairing gap

Comparison of spin susceptibility with experiments

Survey of analytic and Monte Carlo techniques

Abstract

We discuss the pseudogap regime in the cold atomic unitary Fermi gas, with a particular emphasis on the auxiliary-field quantum Monte Carlo (AFMC) approach. We discuss possible signatures of the pseudogap, review experimental results, and survey analytic and quantum Monte Carlo techniques before focusing on AFMC calculations in the canonical ensemble. For the latter method, we discuss results for the heat capacity, energy-staggering pairing gap, spin susceptibility, and compare to experiment and other theoretical methods.