Entropy Growth and the Dark Energy Equation of State

2006/10/27 by W. Buchmüller, Wilfried Buchmuller, Buchmuller, Wilfried +2
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #Statistical Mechanics and Entropy #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0610835

8 pages, 4 figures, Contribution to the QUARKS 2006 conference in St. Petersburg

arxiv created 2006/10/27 · openalex publication_date 2006/10/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We revisit the conjecture of a generalized second law of thermodynamics which states that the combined entropy of matter and horizons must grow. In an expanding universe a generalized second law restricts the equation of state. In particular, it conflicts with long phases of a phantom, w<-1, equation of state.

Related

• Entropy of the holographic dark energy and generalized second law
• The Generalized Second Law in Dark Energy Dominated Universes
• Dark Entropy
• Generalized Second Law of Thermodynamics for Non-canonical Scalar Field Model with Corrected-Entropy
• An Extension of the Second Law of Thermodynamics for Cosmological Stability : Informational Energy