Cosmology in $f(R,L_m)$ gravity

Abstract

In this letter, we investigate the cosmic expansion scenario of the universe in the framework of $f(R,L_m)$ gravity theory. We consider a non-linear $f(R,L_m)$ model, specifically, $f(R,L_m)=\frac{R}{2}+L_m^n+\beta$, where $n$ and $\beta$ are free model parameters. Then we derive the motion equations for flat FLRW universe and obtain the exact solution of corresponding field equations. Then we estimate the best fit ranges of model parameters by using updated $H(z)$ datasets consisting of 57 points and the Pantheon datasets consisting of 1048 points. Further we investigate the physical behavior of density and the deceleration parameter. The evolution of deceleration parameter depicts a transition from deceleration to acceleration phases of the universe. Moreover, we analyze the stability of the solution of our cosmological model under the observational constraint by considering a linear perturbation. Lastlty, we investigate the behavior of Om diagnostic parameter and we observe that our model shows quintessence type behavior. We conclude that our $f(R,L_m)$ cosmological model agrees with the recent observational studies and can efficiently describe the late time cosmic acceleration.

PLB published version

References in corpus (19)

• Dynamics of dark energy
• Disappearing cosmological constant in f(R) gravity
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Extra force in $f(R)$ modified theories of gravity
• Class of viable modified $f(R)$ gravities describing inflation and the onset of accelerated expansion
• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase
• Two new diagnostics of dark energy
• f(R,L_m) gravity
• Are f(R) dark energy models cosmologically viable ?
• Modified f(R) gravity unifying R^m inflation with \LambdaCDM epoch
• Large Scale Structure as a Probe of Gravitational Slip
• Modified gravity with arbitrary coupling between matter and geometry
• Generalized curvature-matter couplings in modified gravity
• Solar system and equivalence principle constraints on f(R) gravity by chameleon approach
• Cosmography of f(R) gravity
• Cosmic acceleration with bulk viscosity in modified $f(Q)$ gravity
• New observational constraints on $f(R)$ gravity from cosmic chronometers
• Constraining f(R) gravity in solar system, cosmology and binary pulsar systems

Cited by in corpus (32)

• Wormhole solutions in $f(R,L_m)$ gravity
• Paramerization of deceleration parameter in $f(Q)$ gravity
• A non-singular bouncing cosmology in $f(R,T)$ gravity
• Constraining Anisotropic Cosmological Model in $f(\mathcal{R},{\mathcal{L}}_m)$ Gravity
• Modeling Transit Dark Energy in $f(R,L_m)$-gravity
• Baryogenesis in $f(R,L_m)$ gravity
• Thermodynamics and Perturbative Analysis of Some Newly Developed $\mathcal{F}(R,L_m,T)$ Theories Under the Scenario of Conserved Energy-momentum Tensor
• Constraining viscous dark energy equation of state in $f(R,L_m)$ gravity
• On possible wormhole solutions supported by non-commutative geometry within $f(R,L_m)$ gravity
• Bouncing cosmological models in $f(R,L_m)$ gravity
• A constrained cosmological model in $f(R,L_m)$ gravity
• Anisotropic quark stars in $f(R,L_m,T)$ gravity
• Exploring wormhole solutions in curvature-matter coupling gravity supported by noncommutative geometry and conformal symmetry
• Stability analysis of f(Q) gravity models using dynamical systems
• A Review of Stable, Traversable Wormholes in f (R) Gravity Theories
• $f(Q,L_m)$ gravity, and its cosmological implications
• Geometric structures of Morris-Thorne wormhole metric in $f(R,L_m)$ gravity and energy conditions
• Moment of inertia and compactness of quark stars within the context of $f(R,T,L_m)$ gravity
• Cosmic acceleration with bulk viscosity in an anisotropic $f(R,L_m)$ background
• Cosmological model with linear equation of state parameter in f(R, Lm) gravity
• Bouncing behavior in $f(R,L_m)$ gravity: Phantom crossing and energy conditions
• The cosmology of $f(R,L_m)$ gravity: constraining the background and perturbed dynamics
• Wormhole solutions under the effect of dark matter in $f(R,L_m)$ gravity
• Growth of cosmic perturbations in the modified $f(R,T)$ gravity
• Gravitational baryogenesis in $f(T,L_m)$ gravity
• Cosmological model with Gong-Zong Parametrization in $f(R,L_m)$ gravity
• Observational constraints on cosmological parameters in the Bianchi type III Universe with f(R,T) gravity theory
• Cosmologies in $f(R,{\mathcal{L}}_m)$ theory with non-minimal coupling between geometry and matter
• Energy conditions in consistent perfect fluid cosmology
• Gravitational waves in Palatini gravity for a non-minimal geometry-matter coupling
• Energy Conditions and Stability of Charged Wormholes in $f(R,{\mathcal{L}}_m)$ Gravity: A Comparative Analysis with Compact Objects
• Phase space analysis of Bianchi III Universe with $f(R,T)$ gravity theory