Quantum radiation produced by a uniformly accelerating charged particle in thermal random motion

TL;DR

This paper explores the quantum Unruh radiation emitted by a uniformly accelerating charged particle in thermal motion, revealing it suppresses classical Larmor radiation due to quantum interference effects.

Contribution

It provides a detailed analysis of Unruh radiation's properties and its relation to Larmor radiation, highlighting the quantum interference effects involved.

Findings

Unruh radiation energy flux is negative and smaller than Larmor radiation.

Unruh radiation suppresses classical Larmor radiation.

Quantum interference significantly influences the radiation signature.

Abstract

We investigate the properties of quantum radiation produced by a uniformly accelerating charged particle undergoing thermal random motions, which originates from the coupling to the vacuum fluctuations of the electromagnetic field. Because the thermal random motions are regarded to result from the Unruh effect, this quantum radiation is termed Unruh radiation. The energy flux of Unruh radiation is negative and smaller than that of Larmor radiation by one order in a/m, where a is the constant acceleration and m is the mass of the particle. Thus, the Unruh radiation appears to be a suppression of the classical Larmor radiation. The quantum interference effect plays an important role in this unique signature. The results is consistent with the predictions of a model consisting of a particle coupled to a massless scalar field as well as those of the previous studies on the quantum effect on the Larmor radiation.