Equation of state of a superfluid Fermi gas in the BCS-BEC crossover

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

We present a theory for a superfluid Fermi gas near the BCS-BEC crossover, including pairing fluctuation contributions to the free energy similar to that considered by Nozieres and Schmitt-Rink for the normal phase. In the strong coupling limit, our theory is able to recover the Bogoliubov theory of a weakly interacting Bose gas with a molecular scattering length very close to the known exact result. We compare our results with recent Quantum Monte Carlo simulations both for the ground state and at finite temperature. Excellent agreement is found for all interaction strengths where simulation results are available.
7 pages, 4 figures, published version in Europhysics Letters, a long preprint with details will appear soon

Keywords

Superconductivity, Statistical Mechanics

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/100557

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0506046
 http://arxiv.org/abs/cond-mat/0506046
 Europhys. Lett. 74, 574 (2006)
 doi:10.1209/epl/i2006-10023-y

Collections

arXiv