Modified cosmology in $f(Q,L_m)$ gravity

Abstract

In this letter, we investigate cosmology within the framework of modified $f(Q,L_m)$ gravity using the non-linear model $f(Q,L_m)=-Q+\alpha L_m^n+\beta$, where $\alpha$, $\beta$, and $n$ are free parameters. The modified Friedmann equations are derived for a matter-dominated universe, and an analytical solution is obtained. Using Hubble, Pantheon+, and joint datasets, we constrain the model parameters and examine their implications. The results indicate that the model accommodates varying $H_0$ values, contributing to the Hubble tension, while $n\ne 1$ suggests deviations from general relativity (GR). The deceleration parameter confirms a transition to acceleration at $z_t\approx 0.6-0.8$, with present values supporting cosmic acceleration. This model offers a viable alternative to GR-based cosmology.

Physics Letters B published version

References in corpus (50)

• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Dynamics of dark energy
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• f(R,T) gravity
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Coincident General Relativity
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Tests of Gaussianity
• f(R,L_m) gravity
• Cosmology in $f(Q)$ geometry
• $f(Q,T)$ gravity
• Construction of cosmologically viable f(G) gravity models
• Large Scale Structure as a Probe of Gravitational Slip
• Cosmological solutions and growth index of matter perturbations in $f(Q)$ gravity
• Cosmic Microwave Background and Supernova Constraints on Quintessence: Concordance Regions and Target Models
• On the LCDM Universe in f(R) gravity
• Energy conditions in $f(R,L_m)$ gravity
• Gravitational induced particle production through a nonminimal curvature-matter coupling
• Energy Conditions in Modified $f(G)$ Gravity
• Weyl type $f(Q,T)$ gravity, and its cosmological implications
• A parametric reconstruction of the deceleration parameter
• Anisotropic nature of space-time in $f(Q)$ gravity
• Observational constraints on two cosmological models of $f(Q)$ theory
• Generalizing the coupling between geometry and matter: $f(R,L_m,T)$ gravity
• Cosmic acceleration and energy conditions in $\Lambda$CDM symmetric teleparallel $f(Q)$ gravity
• On the co-existence of matter dominated and accelerating solutions in f(G)-gravity
• A new parametrization of Hubble parameter in $f(Q)$ gravity
• Late-time acceleration in $f\left(Q\right)$ gravity: Analysis and constraints in an anisotropic background
• Cosmological constraints on alternative model to Chaplygin fluid revisited
• Constant sound speed and its thermodynamical interpretation in $f(Q)$ gravity
• Accelerating Universe scenario in anisotropic $f\left(Q\right)$ cosmology
• Minisuperspace quantum cosmology in $f(Q)$ gravity
• Investigating the dark energy phenomenon in $f(R,L_m)$ cosmological models with observational constraints
• Cosmology from non-minimal geometry-matter coupling
• Quintessence Universe and cosmic acceleration in $f(Q,T)$ gravity
• Late-time cosmology in $f(Q,L_m)$ gravity: Analytical solutions and observational fits
• Constraining $f(Q,L_m)$ gravity with bulk viscosity
• Exploring accelerated expansion in the universe: A study of $f(Q,T)$ gravity with parameterized EoS and cosmological constraints
• Observational analysis of late-time acceleration in $f(Q,L_m)$ gravity
• A Study of stable wormhole solution with non-commutative geometry in the framework of linear $f(R,{\mathcal{L}}_m,T)$ gravity
• Cosmological implications of the constant jerk parameter in $f(Q,T)$ gravity theory
• Constraining the $f(R,T)=R+2\lambda T$ cosmological model using recent observational data
• Energy conditions in the $f(R,L,T)$ theory of gravity

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