Gambini-Pullin Electrodynamics as a scenario for Cherenkov radiation in QED vacuum

TL;DR

This paper explores how a dispersive QED vacuum, modeled with loop quantum gravity, can produce Cherenkov-like radiation when a charge moves through it, revealing new insights into quantum gravity effects on electromagnetic phenomena.

Contribution

It introduces a novel scenario where loop quantum gravity induces a dispersive vacuum that leads to Cherenkov radiation in QED, linking quantum gravity with observable electromagnetic effects.

Findings

Charged particles emit Cherenkov-like radiation in a quantum gravity-influenced vacuum.

The vacuum's dispersive properties are linked to loop quantum gravity structures.

The radiation profile matches classical Cherenkov radiation under specific conditions.

Abstract

We examine the electromagnetic radiation produced by a moving charge in the QED vacuum that behaves as a dispersive medium characterized by a geometrical structure (discreteness/granularity) that emerges from loop quantum gravity. It is shown that the radiation is driven by the refractive vacuum the charged particle travels through reproducing the profile of the Cherenkov effect.