Dynamics of the corotating vortices in dipolar Bose-Einstein condensates in the presence of dissipation

TL;DR

This paper investigates how dipolar interactions and finite temperature effects influence the dynamics and decay of vortices in dipolar Bose-Einstein condensates using a dissipative Gross-Pitaevskii model.

Contribution

It introduces a model to simulate vortex behavior in dipolar BECs considering dissipation and reveals anisotropic effects on vortex trajectories at finite temperatures.

Findings

Dipolar interactions affect vortex decay rates.

Asymmetry in vortex positions leads to different decay behaviors.

Vortex trajectories are influenced by anisotropic dipolar interactions.

Abstract

We study the dynamics of a single and a corotating vortex pair in a dipolar Bose-Einstein condensate in the framework of dissipative Gross-Pitaevskii equation. This simple model enables us to simulate the effect of finite temperature on the vortex dynamics. We study the effect of dipolar interactions on the dynamics of a single vortex in the presence of phenomenological dissipation. In the case of a corotating vortex pair, an initial asymmetry in the locations of the vortices can lead to different decay rates for the constituent vortices as is the case for the condensates interacting via pure contact interactions. We observe that the anisotropic interaction between the component vortices manifests itself as the perceptible difference in the trajectories traversed by the vortices in the condensate at finite temperatures.