Dipole Oscillations of a Fermi Gas in a Disordered Trap: Damping and Localization

Details Dipole Oscillations of a Fermi Gas in a Disordered Trap: Damping and Localization Dipole Oscillations of a Fermi Gas in a Disordered Trap: Damping and Localization

2008-12-18

arxiv.org/abs/0812.3501v2

EPL 88 (2009) 30009

Physics

Condensed Matter

Other Condensed Matter

published as EPL 88 (2009) 30009

Scientific paper

We theoretically study the dipole oscillations of an ideal Fermi gas in a disordered trap. We show that even weak disorder induces strong damping of the oscillations and we identify a metal-insulator crossover. For very weak disorder, we show that damping results from a dephasing effect related to weak random perturbations of the energy spectrum. For increasing disorder, we show that the Fermi gas crosses over to an insulating regime characterized by strong-damping due to the proliferation of localized states.

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