Creating moving gap solitons in spin-orbit-coupled Bose-Einstein condensates

TL;DR

This paper proposes a simple method to generate and control moving gap solitons in spin-orbit-coupled spin-1 Bose-Einstein condensates using free expansion and parameter tuning.

Contribution

It introduces a novel approach to create and manipulate gap solitons in spin-orbit-coupled BECs, linking experimental technique with theoretical modeling.

Findings

Two moving gap solitons can be generated via free expansion.

The dynamics of solitons are controllable through spin-orbit coupling parameters.

The solitons are described by a generalized massive Thirring model.

Abstract

A simple and efficient method to create gap solitons is proposed in a spin-orbit-coupled spin-1 Bose-Einstein condensate. We find that a free expansion along the spin-orbit coupling dimension can generate two moving gap solitons, which are identified from a generalized massive Thirring model. The dynamics of gap solitons can be controlled by adjusting spin-orbit coupling parameters.