Spectrum of radiation of a classical electron moving in the de Sitter spacetime

TL;DR

This paper calculates the radiation spectrum emitted by a classical electron moving in de Sitter spacetime, revealing it radiates as if under a uniform electric field aligned with its momentum.

Contribution

It provides a novel analysis of classical electron radiation in de Sitter spacetime, showing the radiation mimics that in a constant electric field.

Findings

Electron radiates as if in a uniform electric field

Radiation spectrum depends on electron momentum and spacetime geometry

De Sitter spacetime influences classical radiation patterns

Abstract

The radiation spectrum of a classical charged particle (electron) moving in the de Sitter universe, has been calculated. The de Sitter metric is taken in the quasi-Euclidean Robertson-Walker form. It is shown that in the de Sitter spacetime an electron radiates as if it moved in a constant and homogeneous electric field with the strength vector E collinear to the electron momentum P.