Persistent currents in two-component condensates in a toroidal trap
Authors: Abad M., Sartori A., Finazzi S., Recati A.
Autors Affiliation: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy; Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot-Paris 7 and CNRS, Bâtiment 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.
Journal/Review: PHYSICAL REVIEW A
Volume: 89 (5) Pages from: 053602 to: 053602
More Information: 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.DOI: 10.1103/PhysRevA.89.053602Citations: 20data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-01-19References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here