Geometrical observational bounds on a fractal horizon holographic dark energy

TL;DR

This paper introduces a fractal horizon model for holographic dark energy, deriving observational constraints that favor it over the standard cosmological constant and help alleviate the Hubble tension.

Contribution

It proposes a novel fractal structure for the cosmological horizon influencing dark energy models, supported by observational data and Bayesian analysis.

Findings

Strong Bayesian evidence for fractal holographic dark energy

Shift towards smaller baryon density parameter

Shift towards larger Hubble parameter reducing Hubble tension

Abstract

A novel fractal structure for the cosmological horizon, inspired by COVID-19 geometry, which results in a modified area entropy, is applied to cosmology in order to serve dark energy. The constraints based on a complete set of observational data are derived. There is a strong Bayesian evidence in favor of such a dark energy in comparison to a standard $\Lambda$CDM model and that this energy cannot be reduced to a cosmological constant. Besides, there is a shift towards smaller values of baryon density parameter and towards larger values of the Hubble parameter, which reduces the Hubble tension.