Upon the horizon's verge: Thermal particle creation between and approaching horizons

TL;DR

This paper investigates thermal particle creation by accelerating boundaries in flat spacetime, analyzing the spectrum and evolution of particle flux, and relating it to horizons in Schwarzschild-de Sitter spacetime.

Contribution

It provides a complete solution for the particle spectrum of an accelerated boundary in flat spacetime, connecting it to horizon phenomena in curved spacetime.

Findings

Thermal energy flux can occur even with non-equilibrium accelerations.

The evolution between equilibrium states is characterized.

Interference effects between horizons are analyzed.

Abstract

Quantum particle creation from spacetime horizons, or accelerating boundaries in the dynamical Casimir effect, can have an equilibrium, or thermal, distribution. Using an accelerating boundary in flat spacetime (moving mirror), we investigate the production of thermal energy flux despite non-equilibrium accelerations, the evolution between equilibrium states, and the "interference" between horizons. In particular, this allows us to give a complete solution to the particle spectrum of the accelerated boundary correspondence with Schwarzschild-de Sitter spacetime.