Pair correlations in the normal phase of an attractive Fermi gas
Quantum Gases
2020-08-27 v1 Superconductivity
Abstract
In a recent paper [Phys. Rev. A 99, 053617 (2019)], the total number of fermion pairs in a spin-balanced two-component Fermi gas of Li atoms was experimentally probed in the normal phase above the superfluid critical temperature, in order to investigate the sectors of pseudogap and preformed-pair in the temperature-coupling phase diagram. Here, we present a theoretical account of these experimental results in terms of an ab-initio self-consistent -matrix calculation, which emphasizes the role of the pair-correlation function between opposite-spin fermions at equilibrium. Good agreement is found between the available experimental data and the theoretical results obtained with no adjustable parameter.
Cite
@article{arxiv.1912.04802,
title = {Pair correlations in the normal phase of an attractive Fermi gas},
author = {M. Pini and P. Pieri and M. Jäger and J. Hecker Denschlag and G. Calvanese Strinati},
journal= {arXiv preprint arXiv:1912.04802},
year = {2020}
}
Comments
16 pages, 11 figures