DC Josephson Effect with Fermi gases in the Bose-Einstein regime
Other Condensed Matter
2009-11-13 v2 Superconductivity
Abstract
We show that the DC Josephson effect with ultracold fermionic gases in the BEC regime of composite molecules can be described by a nonlinear Schrodinger equation (NLSE). By comparing our results with Bogoliubov-de Gennes calculations [Phys. Rev. Lett. 99, 040401 (2007)] we find that our superfluid NLSE, which generalizes the Gross-Pitaevskii equation taking into account the correct equation of state, is reliable in the BEC regime of the BCS-BEC crossover up to the limit of very large (positive) scattering length. We also predict that the Josephson current displays relevant beyond mean-field effects.
Cite
@article{arxiv.0808.0409,
title = {DC Josephson Effect with Fermi gases in the Bose-Einstein regime},
author = {F. Ancilotto and L. Salasnich and F. Toigo},
journal= {arXiv preprint arXiv:0808.0409},
year = {2009}
}
Comments
9 pages, 6 figures. In the new version added one figure and some paragraphs