Reconstruction of $f(R)$, $f(T)$ and $f(\mathcal{G})$ models inspired by variable deceleration parameter

TL;DR

This paper reconstructs $f(R)$, $f(T)$, and $f( ext{G})$ gravity models based on a variable deceleration parameter law, aiming to improve alignment with current cosmological observations.

Contribution

It introduces a reconstruction method for modified gravity models inspired by a specific deceleration parameter law, extending previous dark energy models.

Findings

Reconstructed $f(R)$, $f(T)$, and $f( ext{G})$ models consistent with observational data.

Demonstrated the flexibility of the variable deceleration parameter law in cosmological modeling.

Provided a framework for better alignment of modified gravity theories with universe acceleration observations.

Abstract

We study an special law for the deceleration parameter, recently proposed by Akarsu and Dereli, in the context of $f(R)$, $f(T)$ and $f(\mathcal{G})$ theories of modified gravity. This law covers the law of Berman for obtaining exact cosmological models to account for the current acceleration of the universe, and also gives the opportunity to generalize many of the dark energy models having better consistency with the cosmological observations. Our aim is to reconstruct the $f(R)$, $f(T)$ and $f(\mathcal{G})$ models inspired by this law of variable deceleration parameter. Such models may then exhibit better consistency with the cosmological observations.