Thermodynamic instability of dark energy equation of state

Abstract

We derive the dark energy fluid equation of state $P=-\epsilon =const.$ as an extremum of entropy, subject to the Hamiltonian constraint of General Relativity. However, we identify perturbations that can render this extremum an entropy minimum designating a thermodynamic instability and specify the mathematical condition for this to occur.

References in corpus (3)

• Dark Energy versus Modified Gravity
• Clustering dark energy and halo abundances
• Relativistic Gravothermal Instabilities

Cited by in corpus (1)

• Generalized interacting Barrow Holographic Dark Energy: cosmological predictions and thermodynamic considerations