de Sitter thermodynamics and the braneworld

TL;DR

This paper explores the thermodynamics of de Sitter space within modified cosmological models, focusing on high-energy braneworld scenarios like Randall-Sundrum and Gauss-Bonnet, linking the Friedmann equation to thermodynamic principles.

Contribution

It introduces a thermodynamic interpretation of the Friedmann equation in high-energy braneworld models and proposes entropy as a tool for parameter selection and tunneling process description.

Findings

Friedmann equation viewed as the first law of thermodynamics in these models

Entropy constrains model parameters and describes tunneling processes

Highlights the thermodynamic consistency of high-energy braneworld cosmologies

Abstract

The de Sitter thermodynamics of cosmological models with a modified Friedmann equation is considered, with particular reference to high-energy Randall-Sundrum and Gauss-Bonnet braneworlds. The Friedmann equation can be regarded as the first law of thermodynamics of an effective gravitational theory in quasi de Sitter spacetime. The associated entropy provides some selection rules for the range of the parameters of the models, and is proposed for describing tunneling processes in the class of high-energy gravities under consideration.