Larmor radiation as a witness to the Unruh effect

TL;DR

This paper argues that observing classical Larmor radiation from accelerated sources can serve as evidence for the Unruh effect, emphasizing the necessity of including the Unruh effect to accurately describe radiation in quantum fields.

Contribution

It demonstrates that the Unruh effect must be incorporated to correctly reproduce Larmor radiation in quantum field interactions from accelerated sources.

Findings

Larmor radiation is linked to the Unruh effect in quantum fields.

Inclusion of the Unruh effect is essential for accurate radiation predictions.

Classical Larmor radiation can serve as evidence for the Unruh effect.

Abstract

We discuss the emission of radiation from general sources in quantum scalar, electromagnetic and gravitational fields using the Rindler coordinate frame, which is suitable for a uniformly accelerated observer, in the Minkowski vacuum. In particular, we point out that, to recover the usual Larmor radiation in the interaction picture, it is necessary to incorporate the Unruh effect. Thus, the observation of classical Larmor radiation could be seen as vindicating the Unruh effect in the sense that it is not correctly reproduced in this context unless the Unruh effect is taken into account.