Stable particlelike solitons with multiply-quantized vortex lines in Bose-Einstein condensates

TL;DR

This paper demonstrates the stability of multiply-quantized vortex lines in a two-component Bose-Einstein condensate, revealing a particlelike Skyrmion structure that resembles cosmic vortons.

Contribution

It introduces a stable configuration of multiply-quantized vortex lines in BECs, resembling Skyrmions and cosmic vortons, which was not previously established.

Findings

Multiply-quantized vortex lines can be energetically stable in BECs.

The vortex structure resembles a particlelike Skyrmion with a vortex ring.

The configuration closely resembles cosmic vortons.

Abstract

We show that a multiply-quantized vortex line core can be energetically stable in a harmonically trapped two-component atomic Bose-Einstein condensate. The structure, in which the condensate component with the vortex line is surrounded by the second component forming a vortex ring, can be identified as a particlelike Skyrmion with a multiply-quantized winding number, and closely resembles cosmic vortons.