f(R,T) Gravity Model Behaving as a Dark Energy Source

Abstract

Within the limits of the present cosmological observations in f(R,T) gravity theory, we have analyzed a spherically symmetric space-time in 5D setting. The field equations have been carefully studied considering reasonable cosmological assumptions to obtain exact solutions. We have obtained an isotropic model universe undergoing super-exponential expansion. It is predicted that the model universe behaves like a dark energy (vacuum energy) model. In the present scenario, the model evolves with a slow and uniform change of shape. It is observed that the universe is close to or nearly flat. The model is free from initial singularity and is predicted to approach the de-Sitter phase dominated by vacuum energy or cosmological constant in the finite-time future. A comprehensive discussion on the cosmological parameters obtained in view of the recent studies is presented in detail with graphs.

arXiv comment14 pages, 9 figures

References in corpus (54)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• The Cosmological Constant and Dark Energy
• f(R,T) gravity
• The Cosmological Constant
• Planck evidence for a closed Universe and a possible crisis for cosmology
• On the Cosmological Implications of the String Swampland
• Reconstruction of f(R, T) gravity describing matter dominated and accelerated phases
• Reconstruction of some cosmological models in f(R,T) gravity
• Covariant conservation of energy momentum in modified gravities
• Quantum escape of sudden future singularity
• Dark energy two decades after: Observables, probes, consistency tests
• Disturbing Implications of a Cosmological Constant
• Dark energy as the weight of violating energy conservation
• Reconstructing $f(R,T)$ gravity from holographic dark energy
• Quantum Field Theory Constrains Traversable Wormhole Geometries
• Energy conditions and their cosmological implications
• A new kind of cyclic universe
• Avoidance of Big Rip In Phantom Cosmology by Gravitational Back Reaction
• Life, The Universe, and Nothing: Life and Death in an Ever-Expanding Universe
• Inhomogeneous Anisotropic Cosmology
• Hidden Negative Energies in Strongly Accelerated Universes
• A Built-in Inflation in the $f(T)$-Cosmology
• Negative Energy Densities in Quantum Field Theory With a Background Potential
• Unified dark fluid in Brans-Dicke theory
• Lectures on quantum energy inequalities
• Cosmological Bardeen-Cooper-Schrieffer condensate as dark energy
• The cosmology in f(R,T) gravity without dark energy
• On de Sitter solutions in asymptotically safe $f(R)$ theories
• An exposition on Friedmann Cosmology with Negative Energy Densities
• Anisotropic Cosmological Models with Energy Density Dependent Bulk Viscosity
• De Sitter Stability and Coarse Graining
• Curvature and Flatness in a Brans-Dicke Universe
• On the Stability of Einstein Static Universe in Doubly General Relativity Scenario
• Quantum vacuum, dark matter, dark energy and spontaneous supersymmetry breaking
• Quantum Inequality Restrictions on Negative Energy Densities in Curved Spacetimes
• Classical Geometry of De Sitter Spacetime : An Introductory Review
• How Problematic is the Near-Euclidean Spatial Geometry of the Large-Scale Universe?
• The nearly flat universe
• Cyclic cosmology in modified gravity
• Cosmological singularities and analytical solutions in varying vacuum cosmologies
• Dynamics of an Anisotropic Universe in $f(R,T)$ Theory
• From de Sitter to de Sitter: A non-singular inflationary universe driven by vacuum
• The dark energy-dominated Universe
• `Operational' Energy Conditions
• From inflation to late time acceleration with a decaying vacuum coupled to radiation or matter
• Revisiting the Cosmological Constant Problem within Quantum Cosmology
• Mixed fluid cosmological model in $f(R,T)$ gravity
• Scenario of Accelerating Universe from the Phenomenological Λ- Models
• Emergent D-instanton as a source of Dark Energy
• Negative Energy Densities and the Limit of Classical Space-Time
• Evolution of the distance scale factor and the Hubble parameter in the light of Plancks results
• "Big Bang'' as a result of first-order phase transition driven by changing scalar curvature in expanding early Universe: "hyperinflation'' scenario
• A Physical Source of Dark Energy and Dark Matter

Cited by in corpus (1)

• Evaluation of cosmological models in $f(R,T)$ gravity in different dark energy scenario