Superfluid gap formation in a fermionic optical lattice with spin imbalanced populations

TL;DR

This paper explores superfluid gap formation in a spin-imbalanced fermionic optical lattice using advanced theoretical methods, revealing insights into low-energy properties and pseudogap behavior near critical temperatures.

Contribution

It introduces a combined dynamical mean-field and quantum Monte Carlo approach to study superfluidity in spin-imbalanced systems within the attractive Hubbard model.

Findings

Identification of superfluid gap formation in imbalanced populations

Observation of pseudogap behavior near critical temperature

Analysis of low-energy properties in polarized superfluid state

Abstract

We investigate the attractive Hubbard model in infinite spatial dimensions at quarter filling. By combining dynamical mean-field theory with continuous-time quantum Monte Carlo simulations in the Nambu formalism, we directly deal with the superfluid phase in the population imbalanced system. We discuss the low energy properties in the polarized superfluid state and the pseudogap behavior in the vicinity of the critical temperature.