Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2004-08-30
Physics
Condensed Matter
Other Condensed Matter
9 pages, 4 figures, contribution presented at LasPhys'04 (Trieste). Final version. Corrected some typos and figures. No change
Scientific paper
We evaluate the dipolar oscillations of a harmonically trapped fermion gas containing thermal bosonic impurities as a function of the anisotropy of the trap, from the numerical solution of the Vlasov-Landau equations for the one-body phase-space distribution functions. Starting from a situation in which the two components of the gaseous mixture perform almost independent oscillations inside a spherical trap, we demonstrate that different collision behaviors arise for oscillations in different directions as the trap is deformed into an elongated cigar-like shape. An increase in the anisotropy of the confinement thus suffices to drive a transition of dipolar modes from a collisionless to a collisional regime.
Capuzzi Pablo
Tosi Mario P.
Vignolo Patrizia
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