Collisions in zero temperature Fermi gases
Soft Condensed Matter
2011-07-19 v1 Statistical Mechanics
Superconductivity
Abstract
We examine the collisional behavior of two-component Fermi gases released at zero temperature from a harmonic trap. Using a phase-space formalism to calculate the collision rate during expansion, we find that Pauli blocking plays only a minor role for momentum changing collisions. As a result, for a large scattering cross-section, Pauli blocking will not prevent the gas from entering the collisionally hydrodynamic regime. In contrast to the bosonic case, hydrodynamic expansion at very low temperatures is therefore not evidence for fermionic superfluidity.
Keywords
Cite
@article{arxiv.cond-mat/0307088,
title = {Collisions in zero temperature Fermi gases},
author = {Subhadeep Gupta and Zoran Hadzibabic and James R. Anglin and Wolfgang Ketterle},
journal= {arXiv preprint arXiv:cond-mat/0307088},
year = {2011}
}
Comments
5 pages, 2 figures