Isotropization of locally rotationally symmetric Bianchi-I universe in $f(Q)$-gravity

Abstract

Despite having the somewhat successful description of accelerated cosmology, the early evolution of the universe always challenges mankind. Our promising approach lies in a new class of symmetric teleparallel theory of gravity named $f(Q)$, where the non-metricity scalar $Q$ is responsible for the gravitational interaction, which may resolve some of the issues. To study the early evolution of the universe, we presume an anisotropic locally rotationally symmetric (LRS) Bianchi-I spacetime and derive the motion equations. We discuss the profiles of energy density, equation of state and skewness parameter and observe that our models archive anisotropic spatial geometry in the early phase of the universe with a possible presence of anisotropic fluid and as time goes on, even in the presence of an anisotropic fluid, the universe could approach isotropy due to inflation and the anisotropy of the fluid fades away at the same time.

Accepted on 12/01/2022 for publication in the journal EPJC

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• FLRW solutions in $f(Q)$ theory: the effect of using different connections
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• Non-metricity with bounday terms: $f(Q,C)$ gravity and cosmology
• Late-time acceleration in $f\left(Q\right)$ gravity: Analysis and constraints in an anisotropic background
• Late-time cosmology with phantom dark-energy in $f(Q)$ gravity
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• Accelerating expansion of the universe in modified symmetric teleparallel gravity
• Accelerating Universe scenario in anisotropic $f\left(Q\right)$ cosmology
• Phase-space analysis of a novel cosmological model in $f(Q)$ theory
• Thermodynamical aspects of Bianchi type-I Universe in quadratic form of $f\left(Q\right)$ gravity and observational constraints
• Comment on "Energy conditions in $f(Q)$ gravity"
• Constraining Anisotropic Cosmological Model in $f(\mathcal{R},{\mathcal{L}}_m)$ Gravity
• Correction to Lagrangian for Bouncing Cosmologies in $f(Q)$ Gravity
• Anisotropic LRS-BI Universe with $f(Q)$ gravity theory
• Anisotropic Universe in $f(Q,T)$ gravity, a novel study
• Energy condition bounds on $f(Q)$ model parameters in a curved FLRW universe
• How different connections in flat FLRW geometry impact energy conditions in $f(Q)$ theory?
• Constraints on anisotropic properties of the universe in $f(Q,T)$ gravity theory
• Anisotropic f(Q) gravity model with bulk viscosity
• Periodic cosmic evolution in $f(Q)$ gravity formalism
• $f(Q,T)$ gravity, its covariant formulation, energy conservation and phase-space analysis
• Cosmic acceleration with bulk viscosity in an anisotropic $f(R,L_m)$ background
• Observation constraints on scalar field cosmological model in Anisotropic universe
• Dynamical system analysis of LRS-BI Universe with f(Q) gravity theory
• Bianchi type-I cosmological dynamics in $f(\mathcal{Q})$ gravity: a covariant approach
• $f(Q,T)$ gravity: From early to late-time cosmic acceleration
• Square-Root parametrization of dark energy in $f(Q)$ cosmology
• Cosmological constraints on $f(Q)$ gravity models in the non-coincident formalism
• A generic dynamical system formulation for Bianchi-I cosmology with isotropic fluid in $f(Q)$ gravity
• Probing symmetric teleparallel gravity in the early universe
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• Magnetic Bianchi-I cosmology in the Horndeski theory
• Anisotropic cosmology using observational datasets: exploring via machine learning approaches
• Issue of Branched Hamiltonian, Inflation and indispensability of scalar field in generalized Teleparallel theories