Barrow Holographic Dark Energy in Brane World Cosmology

TL;DR

This paper explores the cosmological implications of Barrow Holographic Dark Energy within brane world models, demonstrating its potential to explain late-time acceleration and its resemblance to Lambda CDM in the future.

Contribution

It introduces the application of Barrow Holographic Dark Energy to brane world cosmologies, analyzing stability, observational viability, and its role in cosmic acceleration.

Findings

BHDE can account for late-time acceleration without dark sector interaction.

Models resemble Lambda CDM in future state according to statefinder diagnostics.

Classical stability is not achieved in RS-II and DGP brane models.

Abstract

Cosmological features of Barrow Holographic Dark Energy (BHDE), a recent generalization of original Holographic dark energy with a richer structure, are studied in the context of DGP brane, RS II brane-world, and the cyclic universe. It is found that a flat FRW scenario with pressure less dust and a dark energy component described as BHDE can accommodate late time acceleration with Hubble horizon considered as infrared cut off even in the absence of interaction between the dark sectors. Statefinder diagnostic reveals that these model resemble $\Lambda CDM$ cosmology in future. It is found that BHDE parameter $\Delta$, despite its theoretically constrained range of values, is significant in describing the evolution of the universe, however, a classically stable cosmological model cannot be obtained in the RS-II and DGP brane. Viability of the models is also probed with observed Hubble data.