Thermal Particle Creation in Cosmological Spacetimes: A Stochastic Approach

TL;DR

This paper applies a stochastic influence functional approach to analyze thermal particle creation in various cosmological spacetimes, unifying black hole and cosmological radiation phenomena.

Contribution

It introduces a unified stochastic framework to understand thermal radiance in different cosmological and black hole spacetimes, extending previous methods.

Findings

Thermal radiance can be understood through a common stochastic approach.

The framework unifies black hole and cosmological particle creation.

Insights into the nature of thermal radiation in expanding universes.

Abstract

The stochastic method based on the influence functional formalism introduced in an earlier paper to treat particle creation in near-uniformly accelerated detectors and collapsing masses is applied here to treat thermal and near-thermal radiance in certain types of cosmological expansions. It is indicated how the appearance of thermal radiance in different cosmological spacetimes and in the two apparently distinct classes of black hole and cosmological spacetimes can be understood under a unifying conceptual and methodological framework.