Penetration of a vortex dipole across an interface of Bose-Einstein condensates

TL;DR

This paper investigates how vortex dipoles behave at the interface of two-component Bose-Einstein condensates, revealing conditions for penetration, disappearance, or disintegration based on velocity and interactions.

Contribution

It provides new insights into vortex dipole dynamics at interfaces in multi-component BECs, highlighting velocity and interaction effects.

Findings

Vortex dipoles penetrate the interface at high velocities.

Vortex dipoles can disintegrate or disappear depending on parameters.

Interface behavior depends on incident velocity and interaction strengths.

Abstract

The dynamics of a vortex dipole in a quasi-two dimensional two-component Bose-Einstein condensate are investigated. A vortex dipole is shown to penetrate the interface between the two components when the incident velocity is sufficiently large. A vortex dipole can also disappear or disintegrate at the interface depending on its velocity and the interaction parameters.