Probing Dark Energy Properties in $fQ,C)$ Gravity with FLRW Cosmological Models

Abstract

This study delves into the cosmological implications of the $f(Q,C)$ modified gravity framework within the context of the FLRW spacetime which offers a dynamic alternative to the standard $\Lambda$CDM cosmology. Here, we define the transit form of Hubble's parameter to explain several geometrical and physical aspects. The chosen parametric form of the Hubble parameter represents a smooth transition from the decelerating early universe to the accelerating present and late-time evolution. Employing observational datasets such as the Hubble parameter, Type Ia supernovae, Baryon Acoustic Oscillations (BAO), and Standard Candles (SC), we constrain the model parameters using the Markov Chain Monte Carlo (MCMC) method. The isotropic pressure, energy density, equation of state parameter, and energy conditions were analyzed to explore the physical viability of the $f(Q,C)$ framework. The results highlight the model's ability to replicate key cosmological behaviors, including the accelerated expansion driven by dark energy.

12 pages, 7 figures

References in corpus (28)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• The Confrontation between General Relativity and Experiment
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Modified teleparallel gravity: inflation without inflaton
• Palatini Approach to Modified Gravity: f(R) Theories and Beyond
• Modified f(R) gravity unifying R^m inflation with \LambdaCDM epoch
• $f(Q,T)$ gravity
• Large Scale Structure as a Probe of Gravitational Slip
• Recent Advances on Inflation
• Bouncing Cosmology in f(Q) Symmetric Teleparallel Gravity
• Wormhole geometries in $f(Q)$ gravity and the energy conditions
• Analyzing the $H_0$ tension in $F(R)$ gravity models
• The role of the boundary term in $f(Q,B)$ symmetric teleparallel gravity
• Electrically Charged Quark Stars in $4D$ Einstein-Gauss-Bonnet Gravity
• Anisotropic Stars in 4D Einstein-Gauss-Bonnet Gravity
• Modelling the Accelerating Universe with $f(Q)$ Gravity: Observational Consistency
• Testing Born-Infeld $f(T)$ teleparallel gravity through Sgr A${}^{\star }$ observations
• Accelerating bianchi type dark energy cosmological model with cosmic string in f(T) Gravity
• Black hole shadow and chaos bound violation in $f(T)$ teleparallel gravity
• Cosmic Growth in $f(T)$ Teleparallel Gravity
• Preserving quantum information in $f(Q)$ cosmology
• Superentropic Black Hole Shadows in Arbitrary Dimensions
• Five-dimensional compact stars in Einstein-Gauss-Bonnet gravity
• Exploring departures from Schwarzschild black hole in $f(R)$ gravity
• The effective Equation of State in Palatini $f(R)$ cosmology
• Cosmological Evolution of Viscous Dark Energy in f(Q,C) Gravity: Two-Fluid Approach
• Cluster density slopes from Dark Matter-Baryons Energy Transfer
• Linking the Baum-Hawking-Coleman Mechanism with Unimodular Gravity and Vilenkin's Probability Flux