Le Chatelier-Braun principle in cosmological physics

TL;DR

This paper explores the implications of treating dark energy as a near-equilibrium fluid, suggesting that energy transfer from dark energy to dark matter is favored, which could influence cosmological models.

Contribution

It introduces a thermodynamic perspective on dark energy and dark matter interactions, proposing a specific direction for energy transfer based on the Le Chatelier-Braun principle.

Findings

Dark energy can be modeled as a fluid with a well-defined temperature.

Energy transfer from dark energy to dark matter is thermodynamically favored.

The principle constrains the direction of energy flow in cosmological models.

Abstract

Assuming that dark energy may be treated as a fluid with a well defined temperature, close to equilibrium, we argue that if nowadays there is a transfer of energy between dark energy and dark matter, it must be such that the latter gains energy from the former and not the other way around.