Larmor radiation as a witness to the Unruh effect
General Relativity and Quantum Cosmology
2026-02-03 v2 High Energy Physics - Theory
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.
Cite
@article{arxiv.2502.06630,
title = {Larmor radiation as a witness to the Unruh effect},
author = {Atsushi Higuchi and George E. A. Matsas and Daniel A. T. Vanzella and Robert Bingham and Joao P. B. Brito and Luis C. B. Crispino and Gianluca Gregori and Georgios Vacalis},
journal= {arXiv preprint arXiv:2502.06630},
year = {2026}
}
Comments
10 pages, no figures, two Appendices