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arXiv · 2010.02998

Emergent dark energy from unparticles

Michal Artymowski·Ido Ben-Dayan·Utkarsh Kumar
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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.

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Michal Artymowski, Ido Ben-Dayan, Utkarsh Kumar. 2020-10-06. Emergent dark energy from unparticles. https://doi.org/10.1103/physrevd.103.l121303

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