Local-field Theory of the BCS-BEC Crossover
Quantum Gases
2019-08-29 v1
Abstract
We develop a self-consistent theory unifying the description of a quantum Fermi gas in the presence of a Fano-Feshbach resonance in the whole phase diagram ranging from BCS to BEC type of superfluidity and from narrow to broad resonances, including the fluctuations beyond mean field. Our theory covers a part of the phase diagram which is not easily accessible by Quantum Monte Carlo simulations and is becoming interesting for a new class of experiments in cold atoms.
Keywords
Cite
@article{arxiv.1908.10648,
title = {Local-field Theory of the BCS-BEC Crossover},
author = {Pietro Maria Bonetti and Maria Luisa Chiofalo},
journal= {arXiv preprint arXiv:1908.10648},
year = {2019}
}