Cosmology with dark energy decaying through its chemical-potential contribution

TL;DR

This paper explores how incorporating dark energy's chemical potential into cosmological models leads to solutions where dark energy decays into matter or radiation, explaining the observed coincidence and fitting supernova data.

Contribution

It introduces the chemical potential of dark energy into cosmology, providing new solutions where dark energy decays and explains the coincidence problem.

Findings

Dark energy decays into matter or radiation in the model.

Energy densities tend to a constant ratio asymptotically.

Model aligns with supernova redshift observations.

Abstract

The consideration of dark energy's quanta, required also by thermodynamics, introduces its chemical potential into the cosmological equations. Isolating its main contribution, we obtain solutions with dark energy decaying to matter or radiation. When dominant, their energy densities tend asymptotically to a constant ratio, explaining today's dark energy-dark matter coincidence, and in agreement with supernova redshift data.