Transition Radiation of Moving Abrikosov Vortices

TL;DR

This paper demonstrates that moving Abrikosov vortices in superconductors emit microwave radiation, with the emission intensity enhanced by coherent vortex lattice motion, revealing new electromagnetic properties of vortex dynamics.

Contribution

It introduces the phenomenon of vortex-induced electromagnetic radiation and analyzes how coherent vortex motion amplifies the emitted power.

Findings

Vortices emit electromagnetic radiation when approaching the superconductor surface.

Radiation frequency peaks around v_x/lambda, with lambda as the magnetic penetration depth.

Coherent vortex lattice motion significantly increases radiated power.

Abstract

We show that Abrikosov vortices moving towards the surface of a superconductor emit electromagnetic radiation into free space. The frequency distribution of the radiated intensity displays a pronounced maximum at microwave frequencies around v_x/lambda, where lambda is the magnetic penetration length. Coherent motion of a lattice of flux lines leads to constructive interference and increases the strength of the radiated power by a large factor.