Barrow holographic dark energy with Granda-Oliveros cut-off

TL;DR

This paper explores the impact of the Granda-Oliveros infrared cutoff on Barrow holographic dark energy, demonstrating its ability to produce an accelerated universe expansion and transition from quintessence to phantom regimes, with parameter fitting based on observational data.

Contribution

It introduces a novel application of the Granda-Oliveros cutoff to the Barrow holographic dark energy model and analyzes its cosmological implications and stability.

Findings

The model can produce late-time accelerated expansion.

Increasing deformation parameter $\Delta$ causes transition from quintessence to phantom.

Best-fit parameters favor the Bekenstein-Hawking relation.

Abstract

A study on the effects of implementing the Granda-Oliveros infrared cutoff in the recently introduced Barrow Holographic Dark Energy model is presented, and its cosmological evolution is investigated. We find how the deformation parameter, $\Delta$, affects the values of $H(z)$, and find that from this model it is possible to obtain an accelerated expansion regime of the universe at late times. We also obtain that increasing $\Delta$ causes the EoS parameter to transition from quintessence to phantom. In addition, we show that the model can be used to describe the know eras of dominance. Finally, after studying the stability of the proposed model, a fit of the corresponding parameters is preformed, utilizing the measurements of the expansion rate of the universe, $H(z)$. The best fit of the parameters is found to be $(\alpha,\, \beta,\, \Delta) = (1.00^{+0.02}_{-0.02},\,0.69^{+0.03}_{-0.02},\,0.000^{+0.004}_{-0.000})$ at $1\sigma$ C.L, for which the Bekenstein-Hawking relation is favored.