Notes on the experimental observation of the Unruh effect

TL;DR

This paper discusses the Unruh effect, a phenomenon where accelerated observers perceive a thermal bath of particles, and reviews experimental observations of this effect in high-energy physics experiments.

Contribution

It provides an analysis of acceleration-induced thermality and reports on experimental evidence from CERN-NA63 supporting the Unruh effect.

Findings

Experimental observation of Unruh radiation in a high-energy channeling experiment.

Correlation between photon emission and Rindler horizon changes.

Confirmation of thermality associated with acceleration in laboratory conditions.

Abstract

The incorporation of classical general relativity into quantum field theory yields a surprising result -- thermodynamic particle production. One such phenomenon, known as the Unruh effect, causes empty space to effervesce a thermal bath of particles when viewed by an observer undergoing uniformly accelerated motion. These systems will have a Rindler horizon which produces this Unruh radiation at the Fulling-Davies-Unruh temperature. For accelerated charges, the emission and absorption of this radiation will imprint the FDU temperature on photons emitted in the laboratory. Each of these photons will also change the Rindler horizon in accordance with the Bekenstein-Hawking area-entropy law. In this essay, we will discuss these aspects of acceleration-induced thermality which have been experimentally observed in a high energy channeling experiment carried out by CERN-NA63.