Radiation from an inertial mirror horizon

TL;DR

This paper analyzes radiation emitted by a perfectly reflecting mirror moving with asymptotically inertial motion that forms a horizon, computing its energy and spectrum analytically to understand horizon-related radiation phenomena.

Contribution

It provides an analytical computation of energy and spectrum for a mirror with asymptotic inertial motion forming a horizon, highlighting negative energy flux effects.

Findings

Negative energy flux (NEF) observed.

Spectrum and energy computed analytically.

Horizon formation occurs at finite advanced time.

Abstract

The purpose of this study is to investigate radiation from asymptotic zero acceleration motion where a horizon is formed and subsequently detected by an outside witness. A perfectly reflecting moving mirror is used to model such a system and compute the energy and spectrum. The trajectory is asymptotically inertial (zero proper acceleration)-ensuring negative energy flux (NEF), yet approaches light-speed with a null ray horizon at a finite advanced time. We compute the spectrum and energy analytically.