Finite-Temperature Collective Dynamics of a Fermi Gas in the BEC-BCS Crossover
Other Condensed Matter
2009-03-24 v1
Abstract
We report on experimental studies on the collective behavior of a strongly interacting Fermi gas with tunable interactions and variable temperature. A scissors mode excitation in an elliptical trap is used to characterize the dynamics of the quantum gas in terms of hydrodynamic or near-collisionless behavior. We obtain a crossover phase diagram for collisional properties, showing a large region where a non-superfluid strongly interacting gas shows hydrodynamic behavior. In a narrow interaction regime on the BCS side of the crossover, we find a novel temperature-dependent damping peak, suggesting a relation to the superfluid phase transition.
Keywords
Cite
@article{arxiv.0707.3593,
title = {Finite-Temperature Collective Dynamics of a Fermi Gas in the BEC-BCS Crossover},
author = {M. J. Wright and S. Riedl and A. Altmeyer and C. Kohstall and E. R. Sanchez Guajardo and J. Hecker Denschlag and R. Grimm},
journal= {arXiv preprint arXiv:0707.3593},
year = {2009}
}