Emergent dark energy from unparticles
Abstract
A limiting temperature of a species can cause the Universe to asymptote to it yielding a deSitter (dS) phase due to macroscopic emergent behavior. The limiting temperature is generic for theories slightly shifted from their conformal point. We demonstrate such behavior in the example of unparticles/Banks-Zaks theory. The unparticles behave like radiation at high energies reducing the Hubble tension, and a cosmological constant (CC) at low energies yielding a model that follows closely {\Lambda}CDM model but due to collective phenomenon. It is technically natural and avoids the no-dS conjecture. The model is free of the coincidence and initial conditions problems, of scalar fields and of modified gravity.
Cite
@article{arxiv.2010.02998,
title = {Emergent dark energy from unparticles},
author = {Michal Artymowski and Ido Ben-Dayan and Utkarsh Kumar},
journal= {arXiv preprint arXiv:2010.02998},
year = {2021}
}
Comments
4 figures, 6 pages, Matches with Published version