Constraining effective equation of state in $f(Q,T)$ gravity

Abstract

New high-precision observations are now possible to constrain different gravity theories. To examine the accelerated expansion of the Universe, we used the newly proposed $f(Q,T)$ gravity, where $Q$ is the non-metricity, and $T$ is the trace of the energy-momentum tensor. The investigation is carried out using a parameterized effective equation of state with two parameters, $m$ and $n$. We have also considered the linear form of $f(Q,T)=Q+bT$, where $b$ is constant. By constraining the model with the recently published 1048 Pantheon sample, we were able to find the best fitting values for the parameters $b$, $m$, and $n$. The model appears to be in good agreement with the observations. Finally, we analyzed the behavior of the deceleration parameter and equation of state parameter. The results support the feasibility of $f(Q,T)$ as a promising theory of gravity, illuminating a new direction towards explaining the Universe's dark sector.

Revision submitted to EPJC

References in corpus (13)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• f(R,T) gravity
• Disappearing cosmological constant in f(R) gravity
• Cosmological solutions and growth index of matter perturbations in $f(Q)$ gravity
• Thermodynamic interpretation of the generalized gravity models with geometry - matter coupling
• Modelling wormholes in $f(R,T)$ gravity
• Kinematic Constraints to the Transition Redshift from SNe Ia Union Data
• Accelerated Expansion of the Universe in Non-minimally Coupled Gravity
• Cosmography in $f(Q)$ gravity
• $f(Q,T)$ gravity models with observational constraints
• Cosmological implications of modified gravity induced by quantum metric fluctuations
• Constraining the anisotropy of the Universe via Pantheon supernovae sample

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• Isotropization of locally rotationally symmetric Bianchi-I universe in $f(Q)$-gravity
• Fitting $f(Q,T)$ gravity models with a $\Lambda$CDM limit using H(z) and Pantheon data
• Coincident f(Q) gravity: black holes, regular black holes and black bounces
• Viscous cosmology in the Weyl-type $f(Q,T)$ gravity
• Power-law cosmology in Weyl-type $f(Q,T)$ gravity
• Reconstruction of $f(Q,T)$ Lagrangian for various cosmological scenario
• Constrained evolution of effective equation of state parameter in non-linear $f(R,L_m)$ dark energy model: Insights from Bayesian analysis of cosmic chronometers and Pantheon samples
• Exploring accelerated expansion in the universe: A study of $f(Q,T)$ gravity with parameterized EoS and cosmological constraints
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• Generalized Chaplygin gas and accelerating universe in $f(Q,T)$ gravity
• Constraining the $f(R,T)=R+2\lambda T$ cosmological model using recent observational data
• Exploring late-time cosmic acceleration: A study of a linear $f(T)$ cosmological model using observational data
• Interaction of divergence-free deceleration parameter in Weyl-type $f(Q,T)$ gravity
• $f(Q,L_m)$ gravity, and its cosmological implications
• $f(Q,T)$ gravity, its covariant formulation, energy conservation and phase-space analysis
• Tensor Perturbations from Bounce Inflation Scenario in f(Q) Gravity
• Cosmology with viscous generalized Chaplygin gas in $f(Q)$ gravity
• Exploring cosmological evolution and constraints in $f(T)$ teleparallel gravity
• Dynamical system analysis of LRS-BI Universe with f(Q) gravity theory
• Probing Weyl-type $f(Q,T)$ gravity: Cosmological implications and constraints
• $f(Q,T)$ gravity: From early to late-time cosmic acceleration
• Dark energy constraint on equation of state parameter in the Weyl type $f(Q,T)$ gravity
• Perturbation Spectra of Warm Inflation in $f(Q,T)$ Gravity
• Resolving FLRW cosmology through effective equations of state in $f(T)$ gravity
• Effects of the matter Lagrangian degeneracy in $f(Q,T)$ gravity
• Statistical and Observation Comparison of Weyl-Type $f(Q,T)$ Models with the $\Lambda$CDM Paradigm
• Charged black hole solutions in $f(R,T)$ gravity coupled to nonlinear electrodynamics
• Generalized Ghost Pilgrim Dark Energy Fractal Cosmology with Observational Constraint
• Holographic F(Q,T) Gravity with Lambert Solution
• Inflation and primordial fluctuations in $f(Q,T)$ gravity
• Quantum Cosmology in $f(Q)$ theory
• Dynamics of Linear Scalar Perturbation in f(Q)+f(T) class of f(Q,T) gravity