Volume 88, Number 4, November 2009
Article Number 40001
Number of page(s) 6
Section General
Published online 24 November 2009
EPL, 88 (2009) 40001
DOI: 10.1209/0295-5075/88/40001

Quantum hydrodynamics and expansion of a strongly interacting Fermi gas

W. Y. Zhang, L. Zhou and Y. L. Ma

Surface Physics Laboratory and Department of Physics, Fudan University - Shanghai 200433, China

received 4 August 2009; accepted in final form 22 October 2009; published November 2009
published online 24 November 2009

We generalize the quantum hydrodynamical equations and study the dynamics of a strongly interacting Fermi gas trapped in an anisotropic harmonic trap. By using this simple theory to simulate the expansion of the Fermi gas observed experimentally by O'Hara et al., Science, 298 (2002) 2179, we find that the density profiles of the system are well described by the Fetter-like form in the dynamical process in all spatial directions. We also discuss the anisotropic dependence on the expansion.

03.75.Ss - Degenerate Fermi gases.
67.85.De - Dynamic properties of condensates; excitations, and superfluid flow.

© EPLA 2009