Manipulating vortices with a rotating laser beam in Bose–Einstein condensates

Abstract

We investigate the influence of a rotating laser beam on the dynamics of a topological vortex excitation in single-component and binary two-dimensional Bose–Einstein condensates loaded in harmonic traps. The vortex dynamics show different characters by considering the relative position of the vortex and the laser beam and the excitations in the condensates with respect to the rotating frequency and the size of the laser beam. We show the dynamic phase diagrams of single-component condensates with radial isotropy and anisotropy and binary condensates with the vortex and the laser beam being in the same component and different components. Interesting dynamical states such as bound-state, free-state, chaotic-state, free-chaotic-state and bound-chaotic-state are identified for different systems within certain parameter regions.