Controlled engineering of a vortex-bright soliton dynamics using a constant driving force

TL;DR

This paper demonstrates how a constant driving force can precisely control the motion of vortex-bright solitons in Bose-Einstein condensates, enabling flexible manipulation of their trajectories.

Contribution

It introduces a method to control vortex-bright soliton dynamics via a constant force, supported by numerical and theoretical analysis, allowing arbitrary trajectory guidance.

Findings

Displacement of fixed point proportional to applied force

Solitons can be guided, pinned, and released at will

Theoretical model explains and predicts soliton behavior

Abstract

A vortex-bright soliton can precess around a fix point. Here, we find numerically that the fixed point and the associated precessional orbits can be shifted by applying a constant driving force on the bright component, the displacement is proportional to the force with a minus sign. This robust dynamics is then discussed theoretically by treating the vortex-bright soliton as an effective point particle, explaining the observed dynamics and predicting new ones that are subsequently confirmed. By appropriately tuning the force, the vortex-bright soliton can be guided following an arbitrary trajectory, including that it can be pinned and released at will. This finding opens a highly flexible and controllable approach of engineering the dynamics of vortical structures in Bose-Einstein condensates.