Dark energy era with a resolution of Hubble tension in generalized entropic cosmology

TL;DR

This paper introduces a generalized entropy-based dark energy model that aligns with the universe's thermal history and potentially resolves the Hubble tension by fitting observational data.

Contribution

It presents a novel four-parameter generalized entropy framework for dark energy that can reproduce known entropies and addresses the Hubble tension issue.

Findings

The model fits observational datasets well.

It predicts a higher current Hubble parameter.

The entropic parameters are consistent with resolving Hubble tension.

Abstract

We propose a new dark energy (DE) model from four parameter generalized entropy function of apparent horizon in a spatially flat universe. Such kind of generalized entropy is able to generalize all the known entropies proposed so far, for suitable representations of the entropic parameters. It turns out that the scenario can describe the correct thermal history of the universe, with the sequence of matter and dark energy epochs. Comparing with the $\Lambda$CDM model, the proposed generalized entropic DE model provides a higher value of present Hubble parameter for certain range of entropic parameter(s) leading to a possible resolution of Hubble tension issue. We confront the scenario with CC, PantheonPlus+SH0ES, DESI DR1 and compressed Planck likelihood datasets, which clearly depicts the phenomenological viability of the present model for some best fitted values of entropic parameter(s) that are indeed consistent with the resolution of Hubble tension.