Late-time cosmology in (phantom) scalar-tensor theory: dark energy and the cosmic speed-up

Abstract

We consider late-time cosmology in a (phantom) scalar-tensor theory with an exponential potential, as a dark energy model with equation of state parameter close to -1 (a bit above or below this value). Scalar (and also other kinds of) matter can be easily taken into account. An exact spatially-flat FRW cosmology is constructed for such theory, which admits (eternal or transient) acceleration phases for the current universe, in correspondence with observational results. Some remarks on the possible origin of the phantom, starting from a more fundamental theory, are also made. It is shown that quantum gravity effects may prevent (or, at least, delay or soften) the cosmic doomsday catastrophe associated with the phantom, i.e. the otherwise unavoidable finite-time future singularity (Big Rip). A novel dark energy model (higher-derivative scalar-tensor theory) is introduced and it is shown to admit an effective phantom/quintessence description with a transient acceleration phase. In this case, gravity favors that an initially insignificant portion of dark energy becomes dominant over the standard matter/radiation components in the evolution process.

LaTeX file, 48 pages, discussion of Big Rip is enlarged, a reference is added

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• Singular Accelerated Evolution in Massive $F(R)$ Bigravity
• Inflation as an attractor in scalar cosmology
• Barrow entropic Quintessence and Dilation dark energy Models with Generalized HDE cut-off
• Averaging Generalized Scalar Field Cosmologies I: Locally Rotationally Symmetric Bianchi III and open Friedmann-Lemaître-Robertson-Walker models
• Cosmologies from higher-order string corrections
• Holographic dark energy with time varying $c^2$ parameter
• Phantom cosmology as a scattering process
• Big Bang Singularity Resolution In Quantum Cosmology
• Impact of generalized dissipative coefficient on warm inflationary dynamics in the light of latest Planck data
• Static spacetimes haunted by a phantom scalar field II: dilatonic charged solutions
• On finite time singularities in scalar field dark energy models based in the RS-II Braneworld
• On Isotropic Turbulence in the Dark Fluid Universe
• Dynamical dark energy models -- dynamical system approach
• Vacuum fluctuations and topological Casimir effect in Friedmann-Robertson-Walker cosmologies with compact dimensions
• Quantum cosmology with symmetry analysis for quintom dark energy model
• Parametrizing the transition to the phantom epoch with Supernovae Ia and Standard Rulers
• Non-minimal coupling influence on the deviation from de Sitter cosmological expansion
• Manifestly Gauge Invariant Perturbations of Scalar-Tensor Theories of Gravity
• A Dark Energy Model with Generalized Uncertainty Principle in the Emergent, Intermediate and Logamediate Scenarios of the Universe
• Interacting entropy-corrected holographic scalar field models in non-flat universe
• Universe Bounded By Event Horizon: A Non equilibrium Thermodynamic Prescription
• Early dark energy and the screening mechanism
• Cosmic acceleration and $f(R)$ theory: perturbed solution in a matter FLRW model
• Asymptotic behavior of Cardassian cosmologies with exponential potentials
• A Modified Generalized Chaplygin Gas as the Unified Dark Matter-Dark Energy Revisited
• Exponential Potentials and Attractor Solution of Dilatonic Cosmology
• Smooth crossing of $w_{\Lambda }=-1$ line in a single scalar field model
• Stable phantom-divide crossing in two scalar models with matter
• Interacting phantom dark energy: new accelerating scaling attractors
• Sudden singularities in semiclassical gravity
• FRW type of cosmology with a Chaplygin gas
• Gravitational Origin of Phantom Dark Energy and Late Cosmic Acceleration
• Fractional Einstein-Gauss-Bonnet scalar field cosmology
• Two-Fluid Viscous Modified Gravity on a RS Brane
• Warm inflation with non-comoving scalar field and radiation fluid
• Holographic dilatonic model of dark energy
• The little rip in classical and quantum $f(R)$ cosmology
• Polytropic gas scalar field models of dark energy
• No "big trips" for the universe
• Wave dynamics of phantom scalar perturbation in the background of Schwarzschild black hole
• First-order formalism for the quintom model of dark energy
• Self-accelerating solutions of scalar-tensor gravity
• Viscous Accelerating Universe with Non-linear and Logarithmic Equation of State Fluid
• Inflation with explicit parametric connection between General Relativity and Scalar-Tensor gravity
• Phantom fields: bounce solutions in the early Universe and S-branes
• Casimir effect in a six-dimensional vortex scenario
• Dynamical System Analysis of Quintessence Models with Exponential Potential -- Revisited
• Dynamical analysis for a scalar-tensor model with kinetic and non-minimal couplings
• Modified holographic Ricci dark energy coupled to interacting relativistic and non-relativistic dark matter in the nonflat universe
• Viscous extended holographic Ricci dark energy in the framework of standard Eckart theory
• Tachyon model of Tsallis holographic dark energy
• Classical and quantum $f(R)$ cosmology: The big rip, the little rip and the little sibling of the big rip
• Bound on photon circular orbits in general relativity and beyond
• Constraints from CMB in the intermediate Brans-Dicke inflation
• Application of the Abel Equation of the 1st kind to an inflation analysis of non-exactly solvable cosmological models
• A Universe with a generalized ghost dark energy and Van der Waals fluid interacting with a fluid
• Dynamical System Analysis of a Dirac-Born-Infeld Model : A Center Manifold Perspective
• Reconstructing the Universe Evolution from Loop Quantum Cosmology Scalar Fields
• Non-Minimal Quintessence With Nearly Flat Potential
• Non-minimally Coupled Tachyon Field in Teleparallel Gravity
• Cosmological singularities in $f(T,\varphi )$ gravity
• Scalar-tensor black holes in an expanding universe
• Phase transition in Schwarzschild-de Sitter spacetime
• The 1+1+2 formalism for Scalar-Tensor gravity
• Exact general solutions for cosmological scalar field evolution in a background-dominated expansion
• Phantom cosmologies from QCD ghost dark energy
• Remarks on (super-)accelerating cosmological models in general scalar-tensor gravity
• Turbulence Accelerating Cosmology from an Inhomogeneous Dark Fluid
• Braneworld cosmology in the sourced-Taub background
• Two-field cosmological models and large-scale cosmic magnetic fields
• Dark Energy and Cosmological Horizon Thermal Effects
• Scalar field evolution at background and perturbation levels for a broad class of potentials
• Stability analysis of agegraphic dark energy in Brans-Dicke cosmology
• Reconstruction of the equation of state for the cyclic universes in homogeneous and isotropic cosmology
• Anisotropic chiral cosmology: exact solutions
• Deformation of the quintom cosmological model and its consequences
• Universal procedure to cure future singularities of dark energy models
• Perfect fluid solutions of Brans-Dicke and f(R)cosmology
• 4D static solutions with interacting phantom fields
• On Friedmann-Lema\^ıtre-Robertson-Walker cosmologies in non-standard gravity
• Warm Modified Chaplygin Gas Shaft Inflation
• General solutions to $\mathcal{N}$-field cosmology with exponential potentials
• De Sitter and power-law solutions in some models of modified gravity
• Scalar Dark Energy Models and Scalar-Tensor Gravity: Theoretical Explanations for the Accelerated Expansion of Present Universe
• Structure formation in clustering DBI dark energy model with constant sound speed
• What can be learned about dark energy evolution?
• Analysis cosmological tachyon and fermion model and observation data constraints
• Qualitative study in Loop Quantum Cosmology
• Evolutionary quantum cosmology in a gauge-fixed picture
• Quantum Theory at Planck Scale, Limiting Values, Deformed Gravity and Dark Energy Problem
• Thermodynamical description of modified generalized Chaplygin gas model of dark energy
• De Sitter cosmology from Gauss-Bonnet dark energy with quantum effects
• Loop Quantum Cosmology Scalar Field Models
• Singularity crossing, transformation of matter properties and the problem of parametrization in field theories
• Phantom Divide Crossing with General Non-minimal Kinetic Coupling
• A Phase Space Diagram for Gravity
• A new variable in scalar cosmology with exponential potential
• Constant-roll, cosmic acceleration, and massive neutrinos
• Euclidean wormholes with Phantom field and Phantom field accompanied by perfect fluid
• Scalar-tensor gravity from thermodynamic and fluid-gravity perspective
• Dynamics of Potentials in Bianchi Type Scalar-Tensor Cosmology
• $\sigma$CDM coupled to radiation. Dark energy and Universe acceleration
• Quintessence and phantom emerging from the split-complex field and the split-quaternion field
• The linearization method and new classes of exact solutions in cosmology
• Investigation of Bouncing Universe and Phantom Crossing in Modified Gravity Coupled with Weyl Tensor and its Reconstruction
• Cosmological scenarios from multiquintessence
• Non-trivial time crystal-like ground state for gravitational perturbation in quadratic gravity
• New holographic Chaplygin gas model of dark energy
• A Possible Late Time $\Lambda$CDM-like Background Cosmology in Relativistic MOND Theory
• Wave asymptotics at a cosmological time-singularity: classical and quantum scalar fields
• Dynamical System Analysis of Brane Induced Gravity with Tachyon Field
• The evolution of tensor perturbations in scalar-tensor theories of gravity
• Dynamical Casimir Effect with Semi-Transparent Mirrors, and Cosmology
• How Much NEC Breaking Can the Universe Endure?
• Cosmic Evolution with Early and Late Acceleration Inspired by Dual Nature of the Ricci Scalar Curvature
• Quantum effects from particle production on background evolution and Cardy-Verlinde formula in f(R) gravity
• Quintom fields from chiral anisotropic cosmology
• The torsion cosmology in Kaluza-Klein theory
• Non-Minimal Cosmological Model in Modified Yang--Mills Theory
• Eternal vs singular observers in interacting dark energy-dark matter models
• A gracious exit from the matter-dominated phase in a quantum cosmic phantom model
• Integrable higher-dimensional cosmology with separable variables in an Einstein-dilaton-antisymmetric field theory
• Cosmic acceleration in a model of scalar-tensor gravitation
• On the fate of the phantom dark energy universe in semiclassical gravity II: Scalar phantom fields
• Future soft singularities, Born-Infeld-like fields and particles
• Considering Late-Time Acceleration in some Cosmological Models
• A review of the stochastic background of gravitational waves in f(R) gravity with WMAP constrains
• Phantom thick brane in 5D bulk
• Evolution of Dark Energy Perturbations for Slotheon Field and Power Spectrum
• Loop quantum cosmological dynamics of scalar-tensor theory in the Jordan frame
• Cosmic acceleration in screening hybrid quintessence model
• Transient dark energy, cosmological constant boundary crossing and dark energy $w(z)$ data fits
• Asymptotic solutions in f(R)-gravity
• New method of exponential potentials reconstruction based on given scale factor in phantonical two-field models
• Hawking radiation and thermodynamics of dynamical black holes in phantom dominated universe
• Probing Dark Energy Properties in $fQ,C)$ Gravity with FLRW Cosmological Models
• Cosmological Evolution of Viscous Dark Energy in f(Q,C) Gravity: Two-Fluid Approach
• Entropy of cosmological black holes and generalized second law in phantom energy-dominated universe
• Cosmology: Techniques and Observations
• Exploring the deviation of cosmological constant by a generalized pressure dark energy model
• On the necessity of phantom fields for solving the horizon problem in scalar cosmologies
• Gauss-Bonnet Braneworld Cosmology with Modified Induced Gravity on the Brane
• $f(R)$ Gravity and Crossing the Phantom Divide Barrier
• Einstein Spaces Modeling Nonminimal Modified Gravity
• Bouncing cosmological model with general relativistic hydrodynamics in extended gravity
• Cosmological aspects of a vector field model
• Spinor quintom cosmology with intrinsic spin
• A Naturally Minute Quantum Correction to the Cosmological Constant Descended from the Hierarchy
• Topological invariants for superconducting cosmic strings
• The oscillating dark energy and cosmological Casimir effect
• Einstein, Barcelona, Symmetry & Cosmology: The Birth of an Equation for the Universe
• D-bound and Bekenstein bound for McVittie solution surrounded by dark energy cosmological fields
• Dark Energy Accretion onto Van der Waal's Black Hole
• Cosmological singularities in non-canonical models of dark energy
• Dynamical System Analysis of Randall-Sundrum Model with Tachyon Field on the Brane
• Exact Solutions and Constraints on the Dark Energy Model in FRW Universe
• Power-law expansion and Higgs-type potential in a scalar-tensor model
• Phantom scalar emission in the Kerr black hole spacetime
• Scalar fluid in scalar-tensor gravity from an equivalent picture of thermodynamic and fluid descriptions of gravitational dynamics
• Cosmology and stability in scalar tensor bigravity with non-minimal kinetic coupling gravity
• Fierz-Pauli equation for massive gravitons from Induced Matter theory of gravity
• Phantom BTZ black holes
• "All that matter ... in one Big Bang ...," & other cosmological singularities
• Potentials of Coupled Quintessence Based on a Dilaton
• Cosmology and Static Spherically Symmetric solutions in D-dimensional Scalar Tensor Theories: Some Novel Features
• Asymptotically Static Universe
• Thermodynamics and holography of tachyon cosmology
• Acceleration and Deceleration in Curvature Induced Phantom Model of the Late and Future Universe, Cosmic Collapse as Well as its Quantum Escape
• Coupled fluids model in FRW space-time
• Observational constraints on thawing quintessence scalar field model
• The Osgood Criterion and Finite-Time Cosmological Singularities
• Reconstructing cosmic evolution with a density parametrization
• Equivalent Hamiltonian approach to quantum cosmology of integrable models
• Dark energy from a geometrical gauge scalar-tensor theory of gravity
• A new approach to modified-gravity models
• Gravity and induced matter on Nearly Kahler Manifolds
• Modified Gravity on the Brane and Dark Energy
• Non-BPS D9-branes in the Early Universe
• A Heuristic Approach to the Far-Future State of a Universe Dominated by Phantom Energy
• Singularities in and Stability of Ooguri-Vafa-Verlinde Cosmologies
• Thermodynamics of irreversible particle creation phenomena and its cosmological consequence
• Mathematical Singularities in the Farthest Confines of the Universe -- And a Brief Report on Its Evolutionary History
• Is it possible to separate baryonic from dark matter within the $\Lambda$-CDM formalism?
• Evolution of the horizons for dark energy universe
• UV-complete and stable Quintom Dark Energy models in the light of DESI DR2
• Constraints on a scalar-tensor model with Gauss-Bonnet coupling from SN Ia and BAO observations
• Phantom cosmology with arbitrary potential: New accelerating scaling attractors
• The Coincidence Problem in Holographic f(R) Gravity
• Acceleration of the universe in matter dominant era by conformal symmetry breaking
• New Integrable Chiral Cosmological Models with Two Scalar Fields
• Stability Analysis of DGP Brane-world Model with Agegraphic Dark Energy
• Big rip avoidance via black holes production
• Towards a de Sitter quintom-like cosmology from a reduction of a 7-dimensional $BF$ theory
• Numerical solutions to the cosmological 3-fluid problem
• Confronting phantom inflation with Planck data
• A new topological perspective of expanding space-times with applications to cosmology
• Holographic dark energy models with Interactions and entropy corrections for different cutoffs in the Brans-Dicke cosmology
• Background dynamics and observational constraints of flat and non-flat $\Lambda (t)$CDM models from $H(z)$ and DESI DR2 BAO measurements
• Structure formation in a non-canonical scalar field model of clustering dark energy
• The relation between Geometry and Matter in classical and quantum Gravity and Cosmology
• Gravitational Waves Astronomy: a cornerstone for gravitational theories
• Interacting dark matter and q-deformed dark energy non-minimally coupled to gravity
• The holographic bound in the scalar-tensor and $f(R)$ gravities
• Quantum Quintom Cosmology
• Perturbations In Some Dark Energy Models