Localized modes in dense repulsive and attractive Bose-Einstein condensates with spin-orbit and Rabi couplings

Luca Salasnich, Boris A. Malomed

Research output: Contribution to journalArticlepeer-review

Abstract

We consider a binary Bose-Einstein condensate with linear and nonlinear interactions between its components, which emulate the spinor system with spin-orbit (SO) and Rabi couplings. For a relatively dense condensate, one-dimensional coupled equations with the nonpolynomial nonlinearity of both repulsive and attractive signs are derived from the three-dimensional Gross-Pitaevskii equations. Profiles of modes confined in an external potential under the action of the self-repulsion, and self-trapped solitons in the case of the self-attraction, are found in a numerical form and by means of analytical approximations. In the former case, the interplay of the SO and Rabi couplings with the repulsive nonlinearity strongly distorts shapes of the trapped modes, adding conspicuous sidelobes to them. In the case of the attractive nonlinearity, the most essential result is reduction of the collapse threshold under the action of the SO and Rabi couplings.

Original languageEnglish
Article number063625
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume87
Issue number6
DOIs
StatePublished - 21 Jun 2013

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