Controlled generation and manipulation of vortex dipoles in a Bose-Einstein condensate

TL;DR

This paper introduces techniques to generate, control, and manipulate vortex dipoles in Bose-Einstein condensates using laser beams, enabling precise vortex management and collision studies.

Contribution

It presents novel methods for creating and controlling vortex dipoles with laser beams, including velocity control and collision demonstration.

Findings

Vortex dipoles can be generated and launched using red or blue-detuned laser beams.

Critical velocities for vortex nucleation are identified.

Vortex dipoles can be trapped, curved, accelerated, and decelerated with Gaussian beams.

Abstract

We propose methods to generate and manipulate vortex dipoles in a Bose-Einstein condensate using Gaussian beams of red or blue-detuned laser. Velocity-controlled vortex dipoles are shown to be created and launched by a red-detuned beam and by two blue-detuned beams. Critical velocities for the vortex nucleation are investigated. The launched vortex dipoles can be trapped, curved, accelerated, and decelerated using Gaussian beams. Collisions between vortex dipoles are demonstrated.