Quantum radiation from a particle in an accelerated motion coupled to vacuum fluctuations

TL;DR

This paper explores how a uniformly accelerated particle interacts with vacuum fluctuations, leading to quantum radiation that suppresses classical radiation, highlighting the quantum effects related to the Unruh effect.

Contribution

It demonstrates that quantum radiation from an accelerated particle is suppressed compared to classical radiation, providing insights into quantum effects on radiation emission.

Findings

Quantum radiation flux is negative and smaller than classical radiation by a factor a/m.

Quantum effects suppress classical radiation from accelerated particles.

Results relate to the Unruh effect and vacuum fluctuation interactions.

Abstract

A particle in a uniformly accelerated motion exhibits Brownian random motions around the classical trajectory due to the coupling to the field vacuum fluctuations. Previous works show that the Brownian random motions satisfy the energy equipartition relation. This thermal property is understood as the consequence of the Unruh effect. In the present work, we investigate the radiation from the thermal random motions of an accelerated particle coupled to vacuum fluctuations. The energy flux of this radiation is negative of the order smaller than the classical radiation by the factor a/m, where a is the acceleration constant and m is the mass of a particle. The results could be understood as a suppression of the classical radiation by the quantum effect.