Effects of time-periodic linear coupling on two-component Bose-Einstein condensates in two dimensions

H. Susanto, P. G. Kevrekidis, B. A. Malomed, F. Kh Abdullaev

Research output: Contribution to journalArticlepeer-review

Abstract

We examine two-component Gross-Pitaevskii equations with nonlinear and linear couplings, assuming self-attraction in one species and self-repulsion in the other, while the nonlinear inter-species coupling is also repulsive. For initial states with the condensate placed in the self-attractive component, a sufficiently strong linear coupling switches the collapse into decay (in the free space). Setting the linear-coupling coefficient to be time-periodic (alternating between positive and negative values, with zero mean value) can make localized states quasi-stable for the parameter ranges considered herein, but they slowly decay. The 2D states can then be completely stabilized by a weak trapping potential. In the case of the high-frequency modulation of the coupling constant, averaged equations are derived, which demonstrate good agreement with numerical solutions of the full equations.

Original languageEnglish
Pages (from-to)1631-1638
Number of pages8
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume372
Issue number10
DOIs
StatePublished - 3 Mar 2008

Keywords

  • Linear coupling
  • Multiple components
  • Nonlinear Schrödinger equations

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