Gravitationally induced particle production in scalar-tensor $f(R,T)$ gravity

Abstract

We explore the possibility of gravitationally generated particle production in the scalar-tensor representation of $f(R,T)$ gravity. Due to the explicit nonminimal curvature-matter coupling in the theory, the divergence of the matter energy-momentum tensor does not vanish. We explore the physical and cosmological implications of this property by using the formalism of irreversible thermodynamics of open systems in the presence of matter creation/annihilation. The particle creation rates, pressure, temperature evolution and the expression of the comoving entropy are obtained in a covariant formulation and discussed in detail. Applied together with the gravitational field equations, the thermodynamics of open systems lead to a generalization of the standard $\Lambda$CDM cosmological paradigm, in which the particle creation rates and pressures are effectively considered as components of the cosmological fluid energy-momentum tensor. We also consider specific models, and compare the scalar-tensor $f(R,T)$ cosmology with the $\Lambda$CDM scenario and the observational data for the Hubble function. The properties of the particle creation rates, of the creation pressures, and entropy generation through gravitational matter production are further investigated in both the low and high redshift limits.

arXiv comment14 pages, 6 figures. V2: 16 pages, 6 figures; extensive discussion and references added. V3: matches published version

References in corpus (65)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Observation of Gravitational Waves from a Binary Black Hole Merger
• Dynamics of dark energy
• The Cosmological Constant and Dark Energy
• f(R) Theories Of Gravity
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Modified Gravity and Cosmology
• The Confrontation between General Relativity and Experiment
• f(R) theories
• Cosmological Imprint of an Energy Component with General Equation of State
• Cosmological Constant - the Weight of the Vacuum
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• f(R,T) gravity
• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• New Constraints on ${\Omega }_M$, ${\Omega }_{\Lambda }$, and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST
• Observational Probes of Cosmic Acceleration
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degrees
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Beyond the Cosmological Standard Model
• 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
• Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
• The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Overview and Early Data
• f(R,L_m) gravity
• Dark Energy vs. Modified Gravity
• The Megamaser Cosmology Project. XIII. Combined Hubble constant constraints
• Coupling matter in modified $Q$-gravity
• Covariant conservation of energy momentum in modified gravities
• The Dark Matter Distribution in Disk Galaxies
• Further matters in space-time geometry: $f(R,T,R_{\mu \nu }{T}^{\mu \nu })$ gravity
• Nonminimal coupling of perfect fluids to curvature
• $f(T,\mathcal{T})$ gravity and cosmology
• Generalized curvature-matter couplings in modified gravity
• Thermodynamic interpretation of the generalized gravity models with geometry - matter coupling
• Dark matter and the early Universe: a review
• Dynamics of scalar perturbations in f(R,T) gravity
• Dark Matter and Background Light
• Likely Values of the Cosmological Constant
• Hubble Space Telescope Observations of Mira Variables in the Type Ia Supernova Host NGC 1559: An Alternative Candle to Measure the Hubble Constant
• Nonminimal torsion-matter coupling extension of f(T) gravity
• Effective Field Theory of Dark Energy: a Review
• Gravitational induced particle production through a nonminimal curvature-matter coupling
• Extended $f(R,L_m)$ gravity with generalized scalar field and kinetic term dependences
• Dark Energy Survey Year 3 Results: Clustering Redshifts -- Calibration of the Weak Lensing Source Redshift Distributions with redMaGiC and BOSS/eBOSS
• Brief Review of Recent Advances in Understanding Dark Matter and Dark Energy
• The Higgs Portal to Cosmology
• Beyond Einstein's General Relativity: Hybrid metric-Palatini gravity and curvature-matter couplings
• Unveiling the Dynamics of the Universe
• Cosmology in scalar-tensor $f(R,T)$ gravity
• Cosmological evolution and dark energy in osculating Barthel-Randers geometry
• New physics of strong interaction and Dark Universe
• Probing superheavy dark matter with gravitational waves
• Gravitationally Induced Particle Production through a Nonminimal Torsion-Matter Coupling
• Irreversible thermodynamical description of warm inflationary cosmological models
• Growth of Matter Perturbations in the Bi-Galileons Field Model
• Cosmic strings in generalized hybrid metric-Palatini gravity
• Cosmological Constraints on Entropic Cosmology with Matter Creation
• On the Cosmological Models with Matter Creation
• Integrable Cosmological Model with van der Waals Gas and Matter Creation
• Testing CCDM Cosmology with the Radiation Temperature-Redshift Relation

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Observational Constraints and Cosmological Implications of Scalar-Tensor $f(R,T)$ Gravity
• Gravitationally induced matter creation in scalar-tensor $f(R,T_{\mu \nu }{T}^{\mu \nu })$ gravity
• Dynamical reconstruction of the $\Lambda$CDM model in scalar-tensor $f(R,T)$ gravity
• Energy-Momentum Squared Gravity: A Brief Overview
• Moment of inertia and compactness of quark stars within the context of $f(R,T,L_m)$ gravity
• Dynamical reconstruction of the $\Lambda$CDM model in the scalar-tensor representation of $f\left(Q,T\right)$ gravity
• Irreversible Geometrothermodynamics of Open Systems in Modified Gravity
• Interacting Holographic dark energy with matter creation: A dynamical system analysis
• Growth of cosmic perturbations in the modified $f(R,T)$ gravity
• Gravitation with modified fluid Lagrangian: Variational principle and an early dark energy model
• Baryon asymmetry from higher-order matter contributions in gravity
• Modified Gravity with Nonminimal Curvature-Matter Couplings: A Framework for Gravitationally Induced Particle Creation
• Modified $f(R,T)$ theory in light of gravitational wave standard sirens
• Dynamical systems analysis of a cosmological model with interacting Umami Chaplygin fluid in adiabatic particle creation mechanism: Some bouncing features
• Thermodynamics of the Primordial Universe
• Regular black hole solutions in $(2+1)$-dimensional $f(R,T)$ gravity coupled to nonlinear electrodynamics
• Spin effects on particle creation and evaporation in $f(R,T)$ gravity
• Revisiting the Matter Creation Process: Observational Constraints on Gravitationally Induced Dark Energy and the Hubble Tension