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

Abstract

Abstract A vortex-bright (VB) soliton can precess around a fixed 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 VB soliton as an effective point particle. By appropriately tuning the force, the VB soliton can be guided following an arbitrary trajectory with very weak density modulations, including that it can be repeatedly 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.