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