Signatures of the BCS to Bose crossover in atom shot noise correlations

TL;DR

This paper explores how atom shot noise correlations can reveal the superfluid wave function in Fermi gases, providing criteria to distinguish between BCS and Bose regimes, thus advancing understanding of quantum crossover phenomena.

Contribution

It introduces a method to identify the BCS-Bose crossover in atomic Fermi gases through shot noise correlation measurements, offering a new experimental diagnostic.

Findings

Superfluid wave function differs qualitatively in BCS and Bose limits.

Proposes quantitative criteria for crossover identification.

Shot noise correlations can serve as a diagnostic tool.

Abstract

We discuss the superfluid wave function of an atomic Fermi gas, which can be measured in an atom shot noise correlation experiment. We note that it is qualitatively different in the BCS and Bose limits and on the basis of this we propose quantitative criteria to identify the crossover between the two regimes.