Comment on Cherenkov radiation in magnetized vacuum

TL;DR

This paper discusses the theoretical rejection of Cherenkov radiation in a magnetized vacuum despite the medium's refractive index exceeding one, challenging previous assumptions about such phenomena.

Contribution

It provides a quantum kinematic analysis that refutes the possibility of Cherenkov radiation in magnetized vacuum environments.

Findings

Cherenkov radiation is not possible in magnetized vacuum according to quantum kinematics.

Refractive index greater than unity does not imply Cherenkov radiation in this context.

The study clarifies misconceptions about vacuum polarization effects in magnetic fields.

Abstract

The Cherenkov radiation in the vacuum with constant magnetic background is denied within quantum kinematics in spite of the refractive index of that equivalent medium being greater than unity.