Entropy Production from Vacuum Decay

TL;DR

This paper analytically solves Einstein's equations in Robertson-Walker models with decaying vacuum energy, focusing on entropy production resulting from vacuum decay into radiation.

Contribution

It introduces an analytical solution for Einstein equations with a decaying vacuum energy in Robertson-Walker models, emphasizing entropy creation.

Findings

Analytical solutions for Einstein equations with vacuum decay

Quantitative assessment of entropy production

Insights into vacuum energy decay into radiation

Abstract

Using as dynamical variable the square of the radius of the Universe, we solve analytically the Einstein equations in the framework of Robertson-Walker models where a cosmological constant describing phenomenologically the vacuum energy decays into radiation. Emphasis is put on the computation of the entropy creation.