Cosmic acceleration from first principles

Abstract

General relativistic entropic acceleration theory may explain the present cosmic acceleration from first principles without the need of introducing a cosmological constant. Following the covariant formulation of non-equilibrium phenomena in the context of a homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker (FLRW) metric, we find that the growth of entropy associated with the causal horizon of our universe (inside a finite bubble in eternal inflation) induces an acceleration that is essentially indistinguishable from that of $\Lambda$CDM, except for a slightly larger present rate of expansion compared to what would be expected from the CMB in $\Lambda$CDM, possibly solving the so-called $H_0$ tension. The matter content of the universe is unchanged and the coincidence problem is resolved since it is the growth of the causal horizon of matter that introduces this new relativistic entropic force. The cosmological constant is made unnecessary and the future hypersurface is Minkowsky rather than de Sitter.

arXiv comment6 pages, 5 figures. Comments added. Matches version accepted by PDU

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Cited by in corpus (6)

• The Open Effective Field Theory of Inflation
• A GREAT model comparison against the cosmological constant
• Qualitative analysis for viscous cosmologies in a non linear regime of the Israel-Stewart formalism
• Holography and matter creation revisited
• Thermodynamics of an universe with Decaying Cold Dark Matter
• Exploring the cosmological degeneracy between decaying dark matter model and viscous $\Lambda$CDM