Hydrodynamic response of a trapped superfluid to a periodic perturbation
Résumé
In this article we discuss the hydrodynamic response of a superfluid to a periodic drive. Using a WKB description of the hy-drodynamic modes of the system, we show that contrary to Landau's argument, there is no critical velocity, but that the dissipated power nevertheless increases rapidly when the maximum velocity of the perturbation reaches the central sound velocity of the superfluid.
Domaines
Gaz Quantiques [cond-mat.quant-gas]Origine | Fichiers produits par l'(les) auteur(s) |
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