A new parametrization of Hubble parameter in $f(Q)$ gravity

Abstract

In this paper, we examine the accelerated expansion of the Universe at late-time in the framework of $f\left(Q\right)$ gravity theory in which the non-metricity scalar $Q$ describes the gravitational interaction. To this, we propose a new parametrization of the Hubble parameter using a model-independent way and apply it to the Friedmann equations in the FLRW Universe. Then we estimate the best fit values of the model parameters by using the combined datasets of updated $H(z)$ consisting of $57$ points, the Pantheon consisting of $1048$ points, and BAO datasets consisting of six points with the Markov Chain Monte Carlo (MCMC) method. The evolution of deceleration parameter indicates a transition from the deceleration to the acceleration phase of the Universe. In addition, we investigate the behavior of statefinder analysis and Om diagnostic parameter, Further, to discuss other cosmological parameters, we consider a $f\left(Q\right)$\ model, specifically, $f\left(Q\right)=Q+m{Q}^n$, where $m$ and $n$ are free parameters. Finally, we find that the model supports the present accelerating Universe, and the EoS parameter behaves like the quintessence model.

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• Late-time cosmology in $f(Q,L_m)$ gravity: Analytical solutions and observational fits
• Constraining $f(Q,L_m)$ gravity with bulk viscosity
• Observational analysis of late-time acceleration in $f(Q,L_m)$ gravity
• Exploring accelerated expansion in the universe: A study of $f(Q,T)$ gravity with parameterized EoS and cosmological constraints
• Cosmological implications of the constant jerk parameter in $f(Q,T)$ gravity theory
• Model-independent study for a quintessence model of dark energy: Analysis and Observational constraints
• Constraints on anisotropic properties of the universe in $f(Q,T)$ gravity theory
• Modeling cosmic acceleration with a generalized varying deceleration parameter
• A comprehensive parametrization approach for the Hubble parameter in scalar field dark energy models
• Stability analysis of f(Q) gravity models using dynamical systems
• A model-independent method with phantom divide line crossing in Weyl-type $f(Q,T)$ gravity
• Quintessence-like features in the late-time cosmological evolution of $f(Q)$ symmetric teleparallel gravity
• Modified cosmology in $f(Q,L_m)$ gravity
• Cosmological dynamics and observational constraints on a viable $f(Q)$ non-metric gravity model
• Revisiting the epoch of cosmic acceleration
• Modeling and Analyzing Stability of Hybrid Stars within $f(Q)$ Gravity
• Probing Weyl-type $f(Q,T)$ gravity: Cosmological implications and constraints
• Bouncing behavior in $f(R,L_m)$ gravity: Phantom crossing and energy conditions
• Signature flips in time-varying $\Lambda (t)$ cosmological models with observational data
• Cosmological constraints on $f(Q)$ gravity models in the non-coincident formalism
• Energy conditions in $f(Q,L_m)$ gravity
• Observational constraints on the growth index parameters in $f(Q)$ gravity
• Observational constraints using Bayesian statistics and Deep Learning in $f(Q)$ gravity
• Diagnostic Approaches for Interacting generalized holographic Ricci Dark Energy Models
• Cosmic expansion beyond $\Lambda$CDM: Investigating power-law and logarithmic corrections
• Investigating the compatibility of exact solutions in Weyl-type $f(Q,T)$ gravity with observational data
• Cosmic expansion history analysis with Hubble parametrization in $Q^n$ gravity