Abstract
We study numerically the motion of vortices in nonequilibrium Bose–Einstein condensates, that are described by a generalized Gross–Pitaevskii equation. We analyze how the vortex properties are modified when moving away under deviation from equilibrium. We find that far from equilibrium, the radial component dominates over the azimuthal one in the distribution of vortex currents at large distances from the vortex core. The modification of the current pattern has a strong effect on the vortex–antivortex interaction energy, that can become entirely repulsive. The vortex trajectories are also strongly affected by the driving and dissipation. Self acceleration of vortices is observed in the strong nonequilibrium case.
Highlights
Topological defects play a crucial role in determining the properties of ordered phases of matter [1]
We have numerically studied the properties of the motion of vortices in nonequilibrium condensates
As it was known from studies on the complex Ginzburg–Landau equation (cGLE), the nonequilibrium condition strongly affects the currents around the phase singularity
Summary
Original content from this Abstract work may be used under We study numerically the motion of vortices in nonequilibrium Bose–Einstein condensates, that are the terms of the Creative Commons Attribution 3.0 described by a generalized Gross–Pitaevskii equation. We analyze how the vortex properties are modified licence. When moving away under deviation from equilibrium. We find that far from equilibrium, the radial. The modification of the current pattern has a strong effect on the vortex–antivortex the work, journal citation interaction energy, that can become entirely repulsive. The vortex trajectories are strongly affected by and DOI. Self acceleration of vortices is observed in the strong nonequilibrium case
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