Friedmann Thermodynamics and the Geometry of the Universe

TL;DR

This paper reviews Friedmann thermodynamics, a framework that uses thermodynamic principles to determine the universe's geometry by analyzing stability conditions in cosmological models.

Contribution

It introduces and discusses Friedmann thermodynamics, linking thermodynamic concepts with geometric parameters to infer the universe's shape.

Findings

Thermodynamic stability criteria can determine the universe's geometry.

Connections between thermodynamics and cosmology are elucidated.

Framework offers a new perspective on cosmological model selection.

Abstract

In a recent article we have introduced Friedmann thermodynamics, where certain geometric parameters in Friedmann models are treated like their thermodynamic counterparts (temperature, entropy, Gibbs potential etc.). This model has the advantage of allowing us to determine the geometry of the universe by thermodynamic stability arguments. In this article we review connections between thermodynamics, geometry and cosmology.