Dynamics in asymmetric double-well condensates

H. M. Cataldo and D. M. Jezek
Phys. Rev. A 90, 043610 – Published 10 October 2014

Abstract

The dynamics of Bose-Einstein condensates in asymmetric double wells is studied. We construct a two-mode model and analyze the properties of the corresponding phase-space diagram, showing in particular that the minimum of the phase-space portrait becomes shifted from the origin as a consequence of the nonvanishing overlap between the ground and excited states from which the localized states are derived. We further incorporate effective interaction corrections in the set of two-mode model parameters. Such a formalism is applied to a recent experimentally explored system, which is confined by a toroidal trap with radial barriers forming an arbitrary angle between them. We confront the model results with Gross-Pitaevskii simulations for various angle values finding a very good agreement. We also analyze the accuracy of a previously employed simple model for moving barriers, exploring a possible improvement that could cover a wider range of trap asymmetries.

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  • Received 20 July 2014

DOI:https://doi.org/10.1103/PhysRevA.90.043610

©2014 American Physical Society

Authors & Affiliations

H. M. Cataldo and D. M. Jezek

  • IFIBA-CONICET, Pabellón 1, Ciudad Universitaria, 1428, Buenos Aires, Argentina

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Issue

Vol. 90, Iss. 4 — October 2014

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