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Article Dans Une Revue EPL - Europhysics Letters Année : 2009

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

Résumé

We 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 find under-damping and show that it results from weak random perturbations of the energy spectrum. For increasing disorder, we show that the Fermi gas crosses over to a strongly insulating regime characterized by over-damping resulting from the proliferation of localized states.

Dates et versions

hal-00348436 , version 1 (19-12-2008)

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Luca Pezzé, Ben Hambrecht, Laurent Sanchez-Palencia. Dipole Oscillations of a Fermi Gas in a Disordered Trap: Damping and Localization. EPL - Europhysics Letters, 2009, 88, pp.30009. ⟨10.1209/0295-5075/88/30009⟩. ⟨hal-00348436⟩
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