Reconstruction of symmteric teleparallel gravity with energy conditions

TL;DR

This paper reconstructs $f(Q)$ gravity models using energy conditions and observational data, demonstrating late-time cosmic acceleration without dark energy.

Contribution

It introduces a method to reconstruct $f(Q)$ models from energy conditions and observational data, providing explicit expressions for $f(Q)$ and the EOS parameter.

Findings

Estimated Hubble constant around 70 km/sec/Mpc

Derived matter density parameter approximately 0.26-0.27

Graphical analysis shows late-time acceleration without dark energy

Abstract

This research investigates the impact of modified gravity on cosmic scales, focusing on $f(Q)$ cosmology. By applying energy conditions, the study reconstructs various $f(Q)$ models, considering an accelerating Universe, quintessence, and a cosmological constant $\Lambda$. Using up-to-date observational data, including the Supernova Pantheon sample and cosmic chronometer data, Hubble constants $H_0$ are estimated as $70.37^{+0.84}_{-0.92}$ km/sec/Mpc (from $H(z)$ data) and $70.02^{+0.44}_{-0.25}$ km/sec/Mpc (from pantheon compilation of SN Ia data). The matter energy density parameter ($\Omega_{0m}$) is calculated as $0.26^{0.015}_{-0.010}$(OHD) and $0.27^{0.025}_{-0.014}$(SN Ia). Furthermore, as a function of redshift $z$, explicit expressions of $f(Q)$ and the EOS parameter $\omega$ are produced, and their graphical analysis describes the late time acceleration of the Universe without the usage of dark energy.