Cosmological constraints on dark energy in $f(Q)$ gravity: A parametrized perspective

Abstract

In this paper, we focus on the parametrization of the effective equation of state (EoS) parameter within the framework of $f(Q)$ symmetric teleparallel gravity. Here, the gravitational action is represented by an arbitrary function of the non-metricity scalar $Q$. By utilizing a specific parametrization of the effective EoS parameter and a power-law model of $f(Q)$ theory, namely $f(Q)=\beta Q^{\left(m+1\right)}$ (where $\beta$ and $m$ are arbitrary constants), we derive the cosmological solution of the Hubble parameter $H(z)$. To constrain model parameters, we employ recent observational data, including the Observational Hubble parameter Data ($OHD$), Baryon Acoustic Oscillations data ($BAO$), and Type Ia supernovae data ($SNe$ Ia). The current constrained value of the deceleration parameter is found to be $q_0=-0.50_{-0.01}^{+0.01}$, indicating that the current Universe is accelerating. Furthermore, we examine the evolution of the density, EoS, and $Om(z)$ diagnostic parameters to deduce the accelerating nature of the Universe. Finally, we perform a stability analysis with linear perturbations to confirm the model's stability.

Physics of the Dark Universe published version

References in corpus (20)

• f(R,T) gravity
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Two new diagnostics of dark energy
• Hubble parameter measurement constraints on the redshift of the deceleration-acceleration transition, dynamical dark energy, and space curvature
• Large Scale Structure as a Probe of Gravitational Slip
• Cosmological solutions and growth index of matter perturbations in $f(Q)$ gravity
• First evidence that non-metricity f(Q) gravity could challenge $\Lambda$CDM
• Cosmography of f(R) gravity
• Correcting Type Ia Supernova Distances for Selection Biases and Contamination in Photometrically Identified Samples
• A parametric model for dark energy
• Testing $F(Q)$ gravity with redshift space distortions
• Anisotropic nature of space-time in $f(Q)$ gravity
• Observational constraints on two cosmological models of $f(Q)$ theory
• Dynamical system analysis for accelerating models in non-metricity $f(Q)$ gravity
• Cosmic acceleration and energy conditions in $\Lambda$CDM symmetric teleparallel $f(Q)$ gravity
• Late-time acceleration in $f\left(Q\right)$ gravity: Analysis and constraints in an anisotropic background
• Constant sound speed and its thermodynamical interpretation in $f(Q)$ gravity
• Accelerating Universe scenario in anisotropic $f\left(Q\right)$ cosmology
• Reconstruction of interaction rate in Holographic dark energy model with Hubble horizon as the infrared cut-off
• Cosmic chronometers constraints on some fast-varying dark energy equations of state

Cited by in corpus (12)

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• The state of the dark energy equation of state circa 2023
• Data reconstruction of the dynamical connection function in $f(Q)$ cosmology
• Investigating the dark energy phenomenon in $f(R,L_m)$ cosmological models with observational constraints
• Exploring late-time cosmic acceleration: A study of a linear $f(T)$ cosmological model using observational data
• Constraining the $f(R,T)=R+2\lambda T$ cosmological model using recent observational data
• Observational test for $f(Q)$ gravity with weak gravitational lensing
• A comprehensive parametrization approach for the Hubble parameter in scalar field dark energy models
• Cosmological dynamics and observational constraints on a viable $f(Q)$ non-metric gravity model
• Cosmological implications of non-minimally coupled f(Q) gravity
• Mimetic-$f(Q)$ gravity: cosmic reconstruction and energy conditions
• Investigating the compatibility of exact solutions in Weyl-type $f(Q,T)$ gravity with observational data