Dynamics in asymmetric double-well condensates

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.

15 pages, 11 figures

References in corpus (4)

• Dynamics of a tunable superfluid junction
• Spontaneous symmetry breaking in a nonlinear double-well structure
• Symmetry Breaking and Self-trapping of a Dipolar Bose-Einstein Condensate in a Double-well Potential
• Weakly linked binary mixtures of F=1 87-Rb Bose-Einstein condensates

Cited by in corpus (3)

• Bose-Einstein condensates in rotating ring-shaped lattices: a multimode model
• Phonon-Josephson resonances in atomtronic circuits
• Interaction-modulated tunneling dynamics in a mixture of Bose-Einstein condensates