Agegraphic dark energy from entropy of the anti-de Sitter black hole
Qihong Huang, Yang Liu, He Huang
TL;DR
This work proposes ADEADS, an agegraphic dark energy model derived from the entropy of AdS black holes, employing the universe’s age as the infrared cutoff. Confronted with Pantheon+ SN Ia and OHD data, ADEADS yields a cosmological evolution that naturally transitions from radiation and matter domination to a late-time Λ-like acceleration, while a dynamical-system analysis shows a stable, cosmological-constant–like attractor. Although it fits the data comparably to ΛCDM in terms of χ² and AIC, the more stringent BIC slightly disfavors the extra parameter. Statefinder diagnostics reveal that ADEADS can be distinguished from ΛCDM in the late universe, offering a quantum-gravity–inspired holographic alternative with testable predictions for future observations.
Abstract
In this paper, we analyze the agegraphic dark energy from the entropy of the anti-de Sitter black hole using the age of the universe as the IR cutoff. We constrain its parameter with the Pantheon+ Type Ia supernova sample and observational Hubble parameter data, finding that the Akaike Information Criterion cannot effectively distinguish this model from the standard $Λ$CDM model. The present value of Hubble constant $H_{0}$ and the model parameter $b^{2}$ are constrained to $H_{0}=67.7 \pm 1.8$ and $b^{2}=0.303^{+0.019}_{-0.024}$. This model realizes the whole evolution of the universe, including the late-time accelerated expansion. Although it asymptotically approaches the standard $Λ$CDM model in the future, statefinder analysis shows that late-time deviations allow the two models to be distinguished.