Persistent currents in two-component condensates in a toroidal trap
Anno: 2014
Autori: Abad M., Sartori A., Finazzi S., Recati A.
Affiliazione autori: INO-CNR BEC Center and Dipartimento di Fisica, Universit� di Trento, 38123 Povo, Italy; Laboratoire Mat�riaux et Ph�nom�nes Quantiques, Universit� Paris Diderot-Paris 7 and CNRS, B�timent Condorcet, 75205 Paris Cedex 13, France
Abstract: The stability of persistent currents in a two-component Bose-Einstein condensate in a toroidal trap is studied in both the miscible and the immiscible regimes. In the miscible regime we show that superflow decay is related to linear instabilities of the spin-density Bogoliubov mode. We find a region of partial stability, where the flow is stable in the majority component while it decays in the minority component. We also characterize the dynamical instability appearing for a large relative velocity between the two components. In the immiscible regime the stability criterion is modified and depends on the specific density distribution of the two components. The effect of a coherent coupling between the two components is also discussed.
Giornale/Rivista: PHYSICAL REVIEW A
Volume: 89 (5) Da Pagina: 53602-1 A: 53602-9
Maggiori informazioni: We acknowledge stimulating discussions with I. Carusotto, Z. Hadzibabic, and T. Ozawa. This work has been financially supported by ERC through the QGBE grant and by Provincia Autonoma di Trento.
Parole chiavi: Sound-propagation
DOI: 10.1103/PhysRevA.89.053602
Citazioni: 28
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-06-01
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