A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration

Abstract

Increasing evidence suggests that most of the energy density of the universe consists of a dark energy component with negative pressure, a ``cosmological constant" that causes the cosmic expansion to accelerate. In this paper, we address the puzzle of why this component comes to dominate the universe only recently rather than at some much earlier epoch. We present a class of theories based on an evolving scalar field where the explanation is based entirely on internal dynamical properties of the solutions. In the theories we consider, the dynamics causes the scalar field to lock automatically into a negative pressure state at the onset of matter-domination such that the present epoch is the earliest possible time, consistent with nucleosynthesis restrictions, when it can start to dominate.

5 pages, 3 figures

References in corpus (2)

• Kinetically Driven Quintessence
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• UV completions, fixing the equations and nonlinearities in $k$-essence
• Extended Born-Infeld Dynamics and Cosmology
• Power-Law Entropy Corrected Ricci Dark Energy and Dynamics of Scalar Fields
• Reconstructing a String-Inspired Quintom Model of Dark Energy
• Cosmic age, Statefinder and $Om$ diagnostics in the decaying vacuum cosmology
• Thermodynamics of k-essence
• Dynamical analysis for a vector-like dark energy
• Statefinder diagnostic and $w-w^{\prime }$ analysis for interacting polytropic gas dark energy model
• Reconstruction of k-essence model
• A New $Om(z)$ Diagnostic of Dark Energy in General Relativity Theory
• Fermion localization on branes with generalized dynamics
• Coupled quintessence and the impossibility of an interaction: a dynamical analysis study
• Observational constraints on generalized Chaplygin gas model
• An algebraic construction of twin-like models
• Constraints on Dark Energy Models Including Gamma Ray Bursts
• Brane oscillations and the cosmic coincidence problem
• Geodesics of Hayward black hole surrounded by quintessence
• Accelerating Universe and Cosmological Perturbation in the Ghost Condensate
• Hamilton-Jacobi Formalism for Tachyon Inflation
• Cosmological constraints on general, single field inflation
• Agegraphic dark energy: growth index and cosmological implications
• First-order formalism for flat branes in generalized N-field models
• Exploring the Foundations of the Universe with Space Tests of the Equivalence Principle
• Euclid: Forecasts from the void-lensing cross-correlation
• The Impact of Coupled Dark Energy Cosmologies on the High-Redshift Intergalactic Medium
• Cosmological model-independent test of $\Lambda$CDM with two-point diagnostic by the observational Hubble parameter data
• Stability of scalar perturbations in scalar-torsion $f(T,\varphi )$ gravity theories in the presence of a matter fluid
• Reversible and Irreversible Spacetime Thermodynamics for General Brans-Dicke Theories
• On the viability of quintessential inflationary models from observational data
• Hydrodynamical simulations of coupled and uncoupled quintessence models I: Halo properties and the cosmic web
• Duality extended Chaplygin cosmologies with a big rip
• Toward reconstruction of dynamics of the Universe from distant supernovae type Ia
• Multiple kinetic k-essence, phantom barrier crossing and stability
• Statefinder diagnosis and the interacting ghost model of dark energy
• Metastable dark energy
• Supersymmetric K field theories and defect structures
• Cosmological consequences and statefinder diagnosis of a non-interacting generalized Chaplygin gas in $f(R,T)$ gravity
• Redshift-space distortions in massive neutrino and evolving dark energy cosmologies
• Absence of the Fifth Force Problem in a Model with Spontaneously Broken Dilatation Symmetry
• Exploring the Dark Universe: constraints on dynamical Dark Energy models from CMB, BAO and growth rate measurements
• Constant-roll $k$-Inflation Dynamics
• Thermodynamic aspects of dark energy fluids
• Dynamical stability of K-essence field interacting non-minimally with a perfect fluid
• Gravitational collapse of k-essence
• Testing for dynamical dark energy models with redshift-space distortions
• Scale-Dependent Growth from a Transition in Dark Energy Dynamics
• Cosmological consequences of a principle of finite amplitudes
• Probing Inflation and Dark Energy with Current Cosmological Observations
• Theoretical Aspects of Quintom Models
• Effective field theory of modified gravity on the spherically symmetric background: leading order dynamics and the odd-type perturbations
• Brane inflation driven by noncanonical scalar field
• A comprehensive numerical study on four categories of holographic dark energy models
• Symmetric Teleparallel Horndeski Gravity
• Fast full $N$-body simulations of generic modified gravity: derivative coupling models
• Dark energy reconstruction based on the PADE approximation; an expansion around the $\Lambda$CDM
• The $H_0$ Tension in Non-flat QCDM Cosmology
• An equation of state for purely kinetic k-essence inspired by cosmic topological defects
• Separating the Universe into the Real and Fake
• Thermodynamics of perfect fluids from scalar field theory
• Wormholes supported by phantom energy from Shan-Chen cosmological fluids
• Cosmological Perturbations Across an S-brane
• Post-Planck Dark Energy Constraints
• Reconstructing the potentials for the quintessence and tachyon dark energy, from the holographic principle
• Matter with dilaton charge in Weyl-Cartan spacetime and evolution of the Universe
• Solving the Problem of Time in General Relativity and Cosmology with Phantoms and k -- Essence
• Thermodynamics and Shadows of quantum-corrected Reissner-Nordström black hole surrounded by quintessence
• Background cosmological dynamics in $f(R)$ gravity and observational constraints
• Statefinder diagnosis for holographic dark energy in the DGP braneworld
• Some Impacts of Lorentz Violation on Cosmology
• Two Component Model of Dark Energy
• Accretion onto Some Well-Known Regular Black Holes
• Photon motion in Kerr-de Sitter spacetimes
• Atypical k-essence cosmologies
• Supersymmetric extensions of k-field models
• WMAP constraints on Cardassian model
• Is the Dynamics of Tracking Dark Energy Detectable?
• K-essence Models and Cosmic Acceleration in Generalized Teleparallel Gravity
• Phase space analysis of bulk viscous matter dominated universe
• Quintessence dynamics with two scalar fields and mixed kinetic terms
• A new black hole coupled with nonlinear electrodynamics surrounded by quintessence: Thermodynamics, Geodesics, and Regge-Wheeler Potential
• Twinlike models with identical linear fluctuation spectra
• Constraints on massive vector dark energy models from integrated Sachs-Wolfe-galaxy cross-correlations
• Is Dark Energy Dynamical in the DESI Era? A Critical Review
• Tracking Quintessence Would Require Two Cosmic Coincidences
• Clustering of Galaxies with Dynamical Dark Energy
• Cosmic acceleration in non-canonical scalar field model - An interacting scenario
• BPS solitons in a Dirac-Born-Infeld action
• Duality between k-essence and Rastall gravity
• Restoring New Agegraphic Dark Energy in RS II Braneworld
• Evaluation of cosmological models in $f(R,T)$ gravity in different dark energy scenario
• Interacting cosmic fluids in power-law Friedmann-Robertson-Walker cosmological models
• Reconstructing generalized ghost condensate model with dynamical dark energy parametrizations and observational datasets
• Constraining a possible time variation of the gravitational constant G with terrestrial nuclear laboratory data
• Suppressing Quantum Fluctuations in Classicalization
• Localized D-dimensional global k-defects
• The Accelerated Acceleration of the Universe
• Dark Energy and Dark Matter unification via superfluid Chaplygin gas
• K-dynamics: well-posed 1+1 evolutions in K-essence
• Interacting Dark Energy in Hořava-Lifshitz Cosmology
• Strongly Coupled Quintessence
• Star tracks in the ghost condensate
• Anisotropic k-essence cosmologies
• General formulation of cosmological perturbations in scalar-tensor dark energy coupled to dark matter
• Dark-Energy Dynamics Required to Solve the Cosmic Coincidence
• Assisted dark energy
• G-essence with Yukawa Interactions
• Weak lensing predictions for coupled dark energy cosmologies at non-linear scales
• Tracking quintessence and k-essence in a general cosmological background
• Statefinder parameters in two dark energy models
• Power-law Parameterized Quintessence Model
• Cosmological constant dominated transit universe from early deceleration to current acceleration phase in Bianchi-V space-time
• Thermodynamics of Dark Energy
• Constraining the cosmological model of modified $f(Q)$ gravity: Phantom dark energy and observational insights
• Black hole hairs in scalar-tensor gravity and the lack thereof
• Gravity-Assisted Emergent Higgs Mechanism in the Post-Inflationary Epoch
• Interacting viscous ghost tachyon, K-essence and dilaton scalar field models of dark energy
• Effects of ghost dark energy perturbations on the evolution of spherical overdensities
• Approximation of the potential in scalar field dark energy models
• A magnified glance into the dark sector: probing cosmological models with strong lensing in A1689
• Observational Constraints with Recent Data on the DGP Modified Gravity
• The Phase-space analysis of scalar fields with non-minimally derivative coupling
• Fractional dark energy
• Generalized Chaplygin gas model: Cosmological consequences and statefinder diagnosis
• Growth of matter overdensities in non-minimal torsion-matter coupling theories
• Interplay Between Gravity and Quintessence: A Set of New GR Solutions
• Connecting The Non-Singular Origin of the Universe, The Vacuum Structure and The Cosmological Constant Problem
• The dynamical viability of scalar-tensor gravity theories
• Black Hole Ringdown as a Probe for Dark Energy
• Spin-orbit effects for compact binaries in scalar-tensor gravity
• Aspects of Infrared Modifications of Gravity
• Comparison of different approaches to the quasi-static approximation in Horndeski models
• G-essence cosmologies with scalar-fermion interactions
• New solutions with accelerated expansion in string theory
• Cosmology with nonminimal kinetic coupling and a Higgs-like potential
• An effective quintessence field with a power-law potential
• The effective theory of fluids at NLO and implications for dark energy
• k-stabilization in brane models
• Optimal parameterizations for observational constraints on thawing dark energy
• Statefinder Analysis of Symmetric Teleparallel Cosmology
• K-Bounce
• Constraining the Nature of Dark Energy using the SKA
• Inspiral gravitational waveforms from compact binary systems in Horndeski gravity
• Cosmological constraints on non-adiabatic dark energy perturbations
• Agegraphic Dark Energy Model in Non-Flat Universe: Statefinder Diagnostic and $w-w^{\prime }$ Analysis
• Geodesic Structure of the Quantum-Corrected Schwarzschild Black Hole Surrounded by Quintessence
• Cosmological dynamics of $f(R)$ gravity scalar degree of freedom in Einstein frame
• Generalized interacting Barrow Holographic Dark Energy: cosmological predictions and thermodynamic considerations
• On dark energy models of single scalar field
• Measuring Unified Dark Matter with 3D Cosmic Shear
• Parametrising non-linear dark energy perturbations
• The Equation of State of Tracker Fields
• Cosmology of non-minimal derivative coupling to gravity in Palatini formalism and its chaotic inflation
• Model-independent study for a quintessence model of dark energy: Analysis and Observational constraints
• General constraints on Horndeski wormhole throats
• Cuscuton kinks and branes
• A brief note on how to unify dark matter, dark energy, and inflation
• Can phantom transition at $z\sim 1$ restore the Cosmic concordance?
• Coupled Multi-Proca Vector Dark Energy
• Accelerating Dark Energy Cosmological Model in Two Fluid with Hybrid Scale Factor
• Reconstruction of scalar potentials in two-field cosmological models
• The phase-space of generalized Gauss-Bonnet dark energy
• Cosmic Dynamics in $F(R,\varphi )$ Gravity
• Dark energy in scalar-vector-tensor theories
• Phenomenological Fluids from Interacting Tachyonic Scalar Fields
• Holographic kinetic k-essence model
• Tidal Love Numbers from EFT of Black Hole Perturbations with Timelike Scalar Profile
• Observational Implications of Cosmological Event Horizons
• The Influence of Free Quintessence on Gravitational Frequency Shift and Deflection of Light with 4D momentum
• Brans-Dicke Scalar Field as a Unique k-essence
• First Order Formalism for Generalized Vortices
• Hints for possible low redshift oscillation around the best fit $\Lambda$CDM model in the expansion history of the Universe
• Dynamical systems analysis of tachyon dark energy model from a new perspective
• Physical Parameters for Stable $f(R)$ Models
• Compatibility between the scalar field models of tachyon, $k$-essence and quintessence in $f(R,T)$ gravity
• Thermodynamics of Schwarzschild black hole surrounded by quintessence in gravity's rainbow
• Dynamical system analysis for DBI dark energy interacting with dark matter
• Detectable primordial non-gaussianities and gravitational waves in k-inflation
• Early acceleration and adiabatic matter perturbations in a class of dilatonic dark-energy models
• Tsallis Holographic Dark Energy Reconsidered
• Bouncing Universe and phantom crossing in Modified Gravity and its reconstruction
• Probing for the Cosmological Parameters with PLANCK Measurement
• Complementary constraints from FR IIb radio galaxies and X-ray gas mass fractions in clusters on non-standard cosmological models
• Anisotropic singularities in modified gravity models
• Dynamical Systems Analysis of K-essence Model
• Dynamical Stability in presence of non-minimal derivative dependent coupling of $k$-essence field with a relativistic fluid
• Scalar Fields Near Compact Objects: Resummation versus UV Completion
• A Nonlocal Approach to the Cosmological Constant Problem
• Higher derivative scalar-tensor theory through a non-dynamical scalar field
• The general form of the coupled Horndeski Lagrangian that allows cosmological scaling solutions
• Modeling cosmic acceleration with a generalized varying deceleration parameter
• Light of Planck-2015 on Non-Canonical Inflation
• Fierz-Pauli theory reloaded: from a theory of a symmetric tensor field to linearized massive gravity
• Self-reproduction in k-inflation
• Vortex solutions in nonpolynomial scalar QED
• First-order formalism for twinlike models with several real scalar fields
• Probing Modified Gravity with Integrated Sachs-Wolfe CMB and Galaxy Cross-correlations
• The phase-space view of non-local gravity cosmology
• How Fabulous Is Fab 5 Cosmology?
• Evidence for the Fifth Element Astrophysical status of Dark Energy
• Coincidence Problem in an Oscillating Universe
• Split Q-Balls
• Cosmological dynamics of interacting dark energy and dark matter in viable models of f(R) gravity
• Lunar Laser Ranging constraints on nonminimally coupled dark energy and standard sirens
• A note on interacting holographic dark energy with a Hubble-scale cutoff
• Cosmology With Non-Minimally Coupled K-Field
• Casimir Dark Energy, Stabilization of the Extra Dimensions and Gauss-Bonnet Term
• Thawing models in the presence of a generalized Chaplygin gas
• Ghost condensates and pure kinetic $k$-essence condensates in presence of field-fluid non-minimal coupling in the dark sector
• Clustering dark energy imprints on cosmological observables of the gravitational field
• Accelerating Universe in a Big Bounce Model
• Dilaton Coupled Quintessence Model in the $\omega -{\omega }^{\prime }$ Plane
• Born-Infeld Type Phantom Model in the $\omega -{\omega }^{\prime }$ Plane
• Cosmic Degeneracy with Dark Energy Equation of State
• Networks of cosmological histories, crossing of the phantom divide line and potentials with cusps
• Non-minimal kinetic coupling and Chaplygin gas cosmology
• Traversable $\ell$-wormholes supported by ghost scalar fields
• Parametrization of K-essence and Its Kinetic Term
• Disorder on the landscape
• Holographic dark energy with the sign-changeable interaction term
• Brans-Dicke Cosmology in 4D from scalar-vacuum in 5D
• Imprints of interacting dark energy on cosmological perturbations
• Einstein-Cartan gravity with scalar-fermion interactions
• Probing the speed of gravity with LVK, LISA, and joint observations
• The unification of inflation and late-time acceleration in the frame of $k$-essence
• 50 Years of Horndeski Gravity: Past, Present and Future
• Observational constraints on a generalized equation of state model
• Braneworld solutions from scalar field in bimetric theory
• IDECAMB: an implementation of interacting dark energy cosmology in CAMB
• Cosmological aspects of $f(R,T)$ gravity in a simple model with a parametrization of $q$
• Robustness of braneworld scenarios against tensorial perturbations
• Geometrical diagnostic for purely kinetic k-essence dark energy
• Effective Action for Cosmological Scalar Fields at Finite Temperature
• Cosmological perturbations and dynamical analysis for interacting quintessence
• Cosmological evolution of equation of state for dark energy in G-essence models
• Sounds of instability from generalized QCD ghost dark energy
• Bayesian analysis of bulk viscous matter dominated universe
• Dark energy and supermassive black holes
• Growth of Matter Perturbations in the Bi-Galileons Field Model
• Spatial Ricci scalar dark energy model
• New Results on Compact Structures
• Analytic solutions of the geodesic equation for Reissner-Nordström-(anti-)de Sitter black holes surrounded by different kinds of regular and exotic matter fields
• The nonlinear power spectrum in clustering quintessence cosmologies
• Cosmological implications of interacting polytropic gas dark energy model in non-flat universe
• Transition to Zero Cosmological Constant and Phantom Dark Energy as Solutions Involving Change of Orientation of Space-Time Manifold
• A stable flat universe with variable Cosmological constant in f(R,T) Gravity
• Cold dark energy constraints from the abundance of galaxy clusters
• Compact boson stars in K field theories
• Bouncing Cosmology in VCDM
• A tensor theory of space-time as a strained material continuum
• Accretion of Chaplygin gas upon black holes: Formation of faster outflowing winds
• Vacuum Structure and Gravitational Bags Produced by Metric-Independent Spacetime Volume-Form Dynamics
• Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts
• Cosmological Einstein-Maxwell model with $g$-essence
• Age Problem in Lemaitre-Tolman-Bondi Void Models
• Chaplygin gas may prevent big trip
• Bags and Confinement Governed by S.S.B. of Scale Invariance
• Dark energy from cosmological fluids obeying a Shan-Chen non-ideal equation of state
• Observational Constraints on a Variable Dark Energy Model
• Linear perturbations in K-mouflage cosmologies with massive neutrinos
• Constraints on Quintessence From Using Cosmological Data
• Observational constraints of the gravitational waves in the Brans-Dicke theory: Einstein frame and Jordan-Brans-Dicke frame
• The general property of dynamical quintessence field
• Machine Learning and cosmographic reconstructions of quintessence and the Swampland conjectures
• Raychaudhuri equation in $k$-essence geometry: conditional singular and non-singular cosmological models
• Schwarzschild Black Hole Surrounded by Perfect Fluid Dark Matter in the presence of Quintessence Matter Field
• Cosmological Scaling Solutions for Multiple Scalar Fields
• Seeding supermassive black holes with a non-vortical dark-matter subcomponent
• Dark energy, curvature, and cosmic coincidence
• Cosmology-informed neural networks to solve the background dynamics of the Universe
• Discrimination between Lambda-CDM, quintessence, and modified gravity models using wide area surveys
• Most general cubic-order Horndeski Lagrangian allowing for scaling solutions and the application to dark energy
• Null Energy Condition and Dark Energy Models
• Gravitational collapse of K-essence Matter in Painlevé-Gullstrand coordinates
• The Classical Stability Of The Ghost Condensate
• Imperfect fluid cosmological model in modified gravity
• Infrared modified gravity with propagating torsion: instability of torsionfull de Sitter-like solutions
• Scalar Field Reconstruction of Power-Law Entropy-Corrected HDE
• The Phase Space of $k$-Essence $f(R)$ Gravity Theory
• Cosmological Implications of 5-dimensional Brans-Dicke Theory
• Formation of caustics in Dirac-Born-Infeld type scalar field systems
• Stealth black holes in shift symmetric kinetic gravity braiding
• QCD modified ghost scalar field dark energy models
• Deviation from $\Lambda$CDM: Pressure Parametrization
• The relation between cosmological redshift and scale factor for photons
• Future supernova probes of quintessence
• Growth of perturbations in dark energy parametrization scenarios
• Stability of cosmic structures in scalar-tensor theories of gravity
• Primordial black holes from temporally enhanced curvature perturbation
• Gravity with Perturbative Constraints: Dark Energy Without New Degrees of Freedom
• Charged particle dynamics in the surrounding of Schwarzschild anti-de Sitter black hole with topological defect immersed in an external magnetic field
• Dark energy, inflation and the cosmic coincidence problem
• The effective field theory of K-mouflage
• f(T) cosmology against the cosmographic method: A new study using mock and observational data
• Probing Dark Energy with Supernovae : a concordant or a convergent model?
• Roles of Modified Chaplygin-Jacobi and Chaplygin-Abel Gases in FRW Universe
• Observed galaxy power spectrum in cubic Galileon model
• A Self-gravitating Dirac-Born-Infeld Global Monopole
• An analytic model for the transition from decelerated to accelerated cosmic expansion
• Dark Energy and Neutrino CPT Violation
• Cosmological Constraints on Ghost Dark Energy in the Brans-Dicke Theory by Using MCMC Approach
• Lagrangian reconstruction of Barrow holographic dark energy in interacting tachyon model
• A transition between bouncing hyper-inflation to ΛCDM from diffusive scalar fields
• The two-body potential of Vainshtein screened theories
• Exact Solutions for Nonlocal Nonlinear Field Equations in Cosmology
• Vector dark energy models with quadratic terms in the Maxwell tensor derivatives
• Interacting Holographic Dark Energy, the Present Accelerated Expansion and Black Holes
• New universality classes for generic higher character Lifshitz points
• Generalized Galileon Model -- cosmological reconstruction and the Vainshtein mechanism --
• Cosmological neutrino mass limit and the dynamics of dark energy
• Slow-roll Extended Quintessence
• Constraints on the generalized tachyon field models from latest observational data
• Influences of Dark Energy and dark matter on Gravitational Time Advancement
• Evaporation of dynamical horizon with the Hawking temparature in the {\bf K-}essence emergent Vaidya spacetime
• Accretion of Dark Energy onto Higher Dimensional Charged BTZ Black Hole
• Vacuum Solution of a Linear Red-Shift Based Correction in $f(R)$ Gravity
• Interacting Ricci dark energy models with an effective $\Lambda$-term in Lyra manifold
• The renormalization of fluctuating branes, the Galileon and asymptotic safety
• Gaussian-process reconstructions and model building of quintom dark energy from latest cosmological observations
• Cosmological Probes of Structure Growth and Tests of Gravity
• Cosmological Evolution of Pilgrim Dark Energy
• Dark Energy From Fifth Dimensional Brans-Dicke Theory
• Quintessence as k-essence
• Twinlike Models for Kinks, Vortices and Monopoles
• Statefinder parameters for quantum effective Yang-Mills condensate dark energy model
• Analytic vortex solutions in generalized models of the Maxwell-Higgs type
• Is Thick Brane Model Consistent with the Recent Observations?
• CMB constraints on DHOST theories
• Observable Gravitational Waves from Hyperkination in Palatini Gravity and Beyond
• Cosmological Perturbations and the Running Cosmological Constant Model
• Late time cosmic acceleration from vacuum Brans-Dicke theory in 5D
• Cosmological aspects of a unified dark energy and dust dark matter model
• De-Sitter nonlinear sigma model and accelerating universe
• Cosmology with subdominant Horndeski scalar field
• On horizons and wormholes in k-essence theories
• Perfect fluid in Lagrangian formulation due to generalized three-form field
• DESI constraints on $\alpha$-attractor inflationary models
• Gravitational-wave constraints on scalar-tensor gravity from a neutron star and black-hole binary GW200115
• Interacting Ghost Dark Energy in Complex Quintessence Theory
• Superconducting dark energy
• Broken Scale Invariance, Gravity Mass, and Dark Energy in Modified Einstein Gravity with Two Measure Finsler Like Variables
• Curvaton reheating in a Scale Invariant Two Measures Theory
• Cosmological constraints on holographic dark energy models under the energy conditions
• K-essence and kinetic gravity braiding models in two-field measure theory
• BPS bounds in supersymmetric extensions of K field theories
• Parametrizations of Dark Energy Models in the Background of General Non-canonical Scalar Field in $D$-dimensional Fractal Universe
• Compact Chern-Simons vortices
• Periodic Cosmological Evolutions of Equation of State for Dark Energy
• Cosmological constraints from low-redshift data
• Constraints on interacting dark energy revisited: implications for the Hubble tension
• Investigating clustering dark energy with 3d weak cosmic shear
• Jacobi stability analysis of scalar field models with minimal coupling to gravity in a cosmological background
• $k$-Inflation-corrected Einstein-Gauss-Bonnet Gravity with Massless Primordial Gravitons
• Diagnosing the R$\acute{e}$nyi Holographic Dark Energy model in a flat Universe
• Quintessential Inflation with Dynamical Higgs Generation as an Affine Gravity
• Quintom dark energy in DGP braneworld cosmology
• Holographic dark energy with time varying $c^2$ parameter
• Combined cosmological tests of a bivalent tachyonic dark energy scalar field model
• Constraining dark sector perturbations II: ISW and CMB lensing tomography
• Logarithm of the scale factor as a generalised coordinate in a lagrangian for dark matter and dark energy
• Thermodynamics in the universe described by the emergence of the space and the energy balance relation
• Whether Lyra's Manifold Itself is a Hidden Source of Dark Energy
• Constructions of $f(R,G,\mathcal{T})$ Gravity from Some Expansions of the Universe
• Constraining thawing and freezing models with cluster number counts
• Stability of generalized Einstein-Maxwell-scalar black holes
• Quintessence Model and Observational Constraints
• Scalar-tensor cosmologies without screening
• Cosmological constraints on time-varying cosmological terms: A study of FLRW universe models with $\Lambda (t)$CDM cosmology
• A Positive Energy Theorem for P(X,phi) Theories
• Minimal Noncanonical Cosmologies
• $Om$ Diagnostic for Dilaton Dark Energy
• Dynamics of viable $f(R)$ dark energy models in the presence of Curvature-Matter interactions
• Topological structures in a non-canonical perturbative dynamics of a cuscuton-like model
• A More Accurate Parameterization based on cosmic Age (MAPAge)
• A stringy perspective on the coincidence problem
• Robustness of kinetic screening against matter coupling
• New Dynamical Degrees of Freedom from Invertible Transformations
• Stability of kinklike structures in generalized models
• Constraints on interacting dynamical dark energy and a new test for $\Lambda$CDM
• Bounds from ISW-galaxy cross-correlations on generalized covariant Galileon models
• Quantum-corrected Schwarzschild AdS black hole surrounded by quintessence: Thermodynamics and Shadows
• Observation constraints on scalar field cosmological model in Anisotropic universe
• Ultraviolet complete dark energy model
• Cosmological constraints on a dark matter -- dark energy interaction
• Power-Law and Logarithmic Entropy-Corrected Ricci Viscous Dark Energy and Dynamics of Scalar Fields
• Deviation From ΛCDM With Cosmic Strings Networks
• Statefinder Parameter for Varying G in Three Fluid System
• Effective metric in nonlinear scalar field theories
• Exploring the Cosmological Model in $f(R,T^{\varphi })$ Gravity with Observational Constraints
• The $k$-essence scalar field in the context of Supernova Ia Observations
• Quantum cosmology with symmetry analysis for quintom dark energy model
• Observational Constraints on the Generalized Chaplygin Gas
• Dark Energy Scaling from Dark Matter to Acceleration
• Detecting dark energy in long baseline neutrino oscillations
• Interacting holographic dark energy models: A general approach
• Charged Nielsen-Olesen vortices from a Generalized Abelian Chern-Simons-Higgs Theory
• Interacting entropy-corrected holographic scalar field models in non-flat universe
• Towards a future singularity?
• Exponential Potentials and Attractor Solution of Dilatonic Cosmology
• Cosmological Scaling Solutions with Tachyon:Modified Gravity Model
• Observational constraints on the braneworld model with brane-bulk energy exchange
• The Natural TeV Cutoff of the Higgs Field from the Multiplicative Lagrangian
• The interaction of neutrinos with Phantom, Quintessence, and Quintum scalar fields and its effect on the formation of structures in the early Universe
• Conformally and Disformally Coupled Vector field Models of Dark Energy
• Perturbations of the Yang-Mills field in the universe
• Varying-Alpha and K-Essence
• Modeling and Analyzing Stability of Hybrid Stars within $f(Q)$ Gravity
• TASI Lectures on Cosmic Acceleration
• Interacting dark energy in the dark $SU(2{)}_R$ model
• Warm inflation with non-comoving scalar field and radiation fluid
• Constraints on the speed of sound in the k-essence model of dark energy
• Smooth crossing of $w_{\Lambda }=-1$ line in a single scalar field model
• The Phantom of the New Oscillatory Cosmological Phase
• Cosmic jerk parameter in symmetric teleparallel cosmology
• Stable phantom-divide crossing in two scalar models with matter
• Deformation of Axion Potentials: Implications for Spontaneous Baryogenesis, Dark Matter, and Isocurvature Perturbations
• Nonsingular black holes and spherically symmetric objects in nonlinear electrodynamics with a scalar field
• Dark Energy Perturbations Revisited
• No Run Gravity
• Is the Universe Inflating? Dark Energy and the Future of the Universe
• Dark Energy as Double N-Flation--Observational Predictions
• Implications of JLA data for $k-$essence model of dark energy with given equation of state
• First cosmological constraints on the Superfluid Chaplygin gas model
• Interacting dark sector: a dynamical system perspective
• Redshift space distortions in the presence of non-minimally coupled dark matter
• $f(\bar{R},L(X))$-gravity in the context of dark energy with power law expansion and energy conditions
• Holographic Dark Energy and Quantum Entanglement
• Cosmology with a long range repulsive force
• Prospects of probing quintessence with HI 21-cm intensity mapping survey
• Schwarzschild black hole surrounded by quintessential matter field as an accelerator for spinning particles
• A Comparison of Quintessence and Nonlinear Born-Infeld Scalar Field Using Gold Supernova data
• Mass-Varying Massive Gravity with k-essence
• First-order thermodynamics of Horndeski cosmology
• Restrictions on purely kinetic k-essence
• Dissipative quintessence, and its cosmological implications
• Geodesic structure of generalized Vaidya spacetime through the K-essence
• Transition from decelerated to accelerated cosmic expansion in braneworld universes
• Scalar field potentials for closed and open cosmological models
• Tsallis holographic dark energy under Complex form of Quintessence model
• Cosmology in Nonlinear Born-Infeld Scalar Field Theory With Negative Potentials
• The Effective Fluid approach for Modified Gravity and its applications
• Tachyon model of Tsallis holographic dark energy
• Interacting Models of Dark Energy and Dark Matter in Einstein scalar Gauss Bonnet Gravity
• Accelerated expansion from braneworld models with variable vacuum energy
• Generalized Born-Infeld-like models for kinks and branes
• Testing dark energy models with $H(z)$ data
• Stability analysis in Modified Non-Local Gravity
• The effect of modified dispersion relations on the thermodynamics of Schwarzschild black hole surrounded by quintessence
• On the holographic dark energy in chameleon scalar-tensor cosmology
• Tailoring cosmologies in cubic shift-symmetric Horndeski gravity
• Non Singular Origin of the Universe and its Present Vacuum Energy Density
• Signature flips in time-varying $\Lambda (t)$ cosmological models with observational data
• Interacting viscous entropy-corrected holographic scalar field models of dark energy with time-varying G in modified FRW cosmology
• Chaotic Inflation and Reheating in Generalized Scalar-Tensor Gravity
• Stochastic tunneling for strongly non-Gaussian inflationary theories
• Is dark energy from cosmic Hawking radiation?
• Cosmological Coincidence without Fine Tuning
• Higher dimensional cosmological model with a phantom field
• Cosmological Analysis of Modified Holographic Ricci Dark Energy in Chern-Simons Modified Gravity
• Holographik, the k-essential approach to interactive models with modified holographic Ricci dark energy
• $K$-essence model from the mechanical approach point of view: coupled scalar field and the late cosmic acceleration
• Polytropic gas scalar field models of dark energy
• Self-dual soliton solutions in a Chern-Simons-CP(1) model with a nonstandard kinetic term
• Scaling solutions as Early Dark Energy resolutions to the Hubble tension
• First-order formalism for the quintom model of dark energy
• Covariance of dark energy parameters and sound speed constraints from large HI surveys
• Bulk viscous fluid in symmetric teleparallel cosmology: theory versus experiment
• Effect of quintessence dark energy on the shadow of Hayward black holes with spherical accretion
• Pole Dark Energy
• The role of higher derivative bulk scalar in stabilizing a warped spacetime
• General Markovian Equation for Scalar Fields in a Slowly Evolving Background
• Late time cosmic acceleration from natural infrared cutoff?
• Ghost dark energy with sign-changeable interaction term
• K-essence in Horndeski models
• An extension of the cosmological standard model with a bounded Hubble expansion rate
• Black-bounce solutions in a k-essence theory under the effects of bumblebee gravity
• Constraining Exponential f(Q) Gravity with Cosmic Chronometers and Supernovae: A Data-Driven Analysis
• Non-canonical kinetic structures in the swampland
• Mixed fluid cosmological model in $f(R,T)$ gravity
• Gravity in the dynamical approach to the cosmological constant
• Novel Screening with Two Bodies: Summing the ladder in disformal scalar-tensor theories
• Reconstruction of f-essence and fermionic Chaplygin gas models of dark energy
• Non-Stationary Dark Energy Around a Black Hole
• Generalized sine-Gordon solitons
• Scalar emission from neutron star-black hole binaries in scalar-tensor theories with kinetic screening
• Cosmic acceleration and ekpyrotic bounce with Chameleon field
• Presence of anisotropic pressures in Lemaître-Tolman-Bondi cosmological models
• Cosmological effects on $f(\bar{R},\bar{T})$ gravity through a non-standard theory
• Barrow holographic dark energy models in $f\left(Q\right)$ symmetric teleparallel gravity with Lambert function distribution
• Tachyonic (phantom) power-law cosmology
• Quintessential Isocurvature in Separate Universe Simulations
• Modified Gravity and Inflaton Assisted Dynamical Generation of Charge Confinement and Electroweak Symmetry Breaking in Cosmology
• Testing a dissipative kinetic k-essence model
• Non-locality and late-time cosmic acceleration from an ultraviolet complete theory
• Non-minimally Coupled Tachyon Field in Teleparallel Gravity
• Dynamical System Analysis of a Dirac-Born-Infeld Model : A Center Manifold Perspective
• Self-tuning kinetic gravity braiding: Cosmological dynamics, shift symmetry, and the tadpole
• Coupling of Brans-Dicke scalar field with Horava-Lifshitz gravity
• A primer on problems and prospects of dark energy
• Study of Some Parameters of Modified Chaplygin Gas in Galileon Gravity Theory from Observational Perspective
• Collapsing scenarios of K-essence generalized Vaidya spacetime under $f(\bar{R},\bar{T})$ gravity
• Effect of low anisotropy on cosmological models by using supernova data
• Scalar-tensor black holes in an expanding universe
• Cosmology with a Continuous Tower of Scalar Fields
• Supersymmetric galileons and auxiliary fields in 2+1 dimensions
• Constraints on Cosmological Models from Hubble Parameters Measurements
• Ricci curvature non-minimal derivative coupling cosmology with field re-scaling
• Freezing Out Early Dark Energy
• The Gravitino Swampland Conjecture
• Reconstructing quintom from WMAP 5-year observations: Generalized ghost condensate
• Inflationary behavior of $R^2$ gravity in a conformal framework
• Origin of the Chemical Elements
• 2-form gauge theory dual to scalar-tensor theory
• Relativistic effects in the large-scale structure with effective dark energy fluids
• Phantom shell around black hole and global geometry
• Dynamical analysis of coupled curvature-matter scenario in viable $f(R)$ dark energy models at de Sitter phase
• Non-minimal coupling of the phantom field and cosmic acceleration
• Stability of the holographic description of the Universe
• Matching the linear spectra of twinlike defects
• Non-local scalar fields inflationary mechanism in light of Planck $2013$
• Cosmological constraints on superconducting dark energy models
• Homogeneous and Isotropic Charge Densities to Accelerate the Universe
• Compact-like vortices in isotropic curved spacetime
• Scalar fields in the nonsymmetric Kaluza-Klein (Jordan-Thiry) theory
• $k$-essence non-minimally coupled with Gauss-Bonnet invariant for inflation
• A new generic evolution for $k$-essence dark energy with $w\approx -1$
• Phantom attractors in Kinetic Gravity Braiding theories: a dynamical system approach
• Higher-dimensional black holes with Dirac-Born-Infeld (DBI) global defects
• CMB power spectrum in the emergent universe with k-essence
• Dark energy with a shift-symmetric scalar field: obstacles, loophole hunting and dead ends
• Cosmic evolution in novel-Gauss Bonnet Gravity
• Stars disformally coupled to a shift-symmetric scalar field
• Reconstruction of the equation of state for the cyclic universes in homogeneous and isotropic cosmology
• Nonsingular Chaplygin gas cosmologies in universes connected by wormhole
• Causality and Stability from Acoustic Geometry
• Beyond $\Lambda$CDM: Exploring a Dynamical Cosmological Constant Framework Consistent with Late-Time Observations
• On Dark Energy Isocurvature Perturbation
• Accelerating expansion of the universe may be caused by inhomogeneities
• Stealth black hole perturbations in kinetic gravity braiding
• Dynamics of k-essence in loop quantum cosmology
• Galactic Halos and Black Holes in Non-Canonical Scalar Field Theories
• Accelerated expansion of the Universe driven by G-essence
• Primordial perturbations and inflation in holographic cosmology
• A new nonlinear instability for scalar fields
• Cosmic Microwave Background Anisotropy numerical solution (CMBAns) I: An introduction to $C_l$ calculation
• Cosmic inflation from broken conformal symmetry
• Constraining the Lattice Fluid Dark Energy from SNe Ia, BAO and OHD
• A note on observational signatures in superluminal unified dark matter models
• A Note on Quantum Compactons
• Structure formation in clustering DBI dark energy model with constant sound speed
• Scattering and absorption sections of Schwarzschild-anti de Sitter with quintessence
• Thawing k-essence dark energy in the PAge space
• Hubble flow variations as a test for inhomogeneous cosmology
• Cosmology of Vacuum
• Dark energy in hybrid inflation
• Generalized Jackiw-Teitelboim gravity in presence of Bloch brane-like models
• Flatness without CMB - the Entanglement of Spatial Curvature and Dark Energy Equation of State
• Scalar Dark Energy Models and Scalar-Tensor Gravity: Theoretical Explanations for the Accelerated Expansion of Present Universe
• Scalar field inflation and Shan-Chen fluid models
• Dark Energy and Dark Matter From Hidden Symmetry of Gravity Model with a Non-Riemannian Volume Form
• Backreaction mechanism in multifluid and extended cosmologies
• Multidimensional gravitational model with anisotropic pressure
• Interacting Kasner-type cosmologies
• Investigation of Bouncing Universe and Phantom Crossing in Modified Gravity Coupled with Weyl Tensor and its Reconstruction
• Two-body problem in theories with kinetic screening
• Euclid preparation. Simulations and nonlinearities beyond $\Lambda$CDM. 1. Numerical methods and validation
• Statistics of Thawing K-essence Dark Energy Models
• Cosmological Dynamics in Interacting Scalar-Torsion f(T,$\varphi$) Gravity: Investigating Energy and Momentum Couplings
• On the instability of some k-essence space-times
• Probing Quintessence Potential with Future Cosmological Surveys
• Phase-space analysis of torsion-coupled dilatonic ghost condensate
• Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions
• Quintessential Inflation in Mimetic Dark Matter
• Observational constraints on the unified dark matter and dark energy model based on the quark bag model
• The variation of the electromagnetic coupling and quintessence
• Constraining Slow-Roll Inflation in the Presence of Dynamical Dark Energy
• The growth of DM and DE perturbations in DBI non-canonical scalar field scenario
• Quintessential Inflation, Unified Dark Energy and Dark Matter, and Higgs Mechanism
• Non-linear spherical collapse in tachyon models, and a comparison of collapse in tachyon and quintessence models of dark energy
• Black Hole Dynamics in Power-law based Metric $f(R)$ Gravity
• Cosmological models based on a complex scalar field with a power-law potential associated with a polytropic equation of state
• Generalized scalar field models with the same energy density and linear stability
• Dynamical System Analysis of a Three Fluid Cosmological Model : An Invariant Manifold approach
• Friedmann-Robertson-Walker Models with Late-Time Acceleration
• Mimetic-Metric-Torsion with induced Axial mode and Phantom barrier crossing
• Stabilization of internal space in noncommutative multidimensional cosmology
• Quintessence Cosmology with an Effective $\Lambda$-Term in Lyra Manifold
• Scalar field dark energy: Insights into cosmological evolution and black hole accretion
• Dynamics of entropy perturbations in assisted dark energy with mixed kinetic terms
• New holographic Chaplygin gas model of dark energy
• Dynamics of tachyon field in spatially curved FRW universe
• Statefinder analysis of the superfluid Chaplygin gas model
• The effect of curvature in thawing models
• Probing extra dimensions through cosmological observations of dark energy
• Observational constraints on G-corrected holographic dark energy using a Markov chain Monte Carlo method
• Cosmological Dark sector from a Mimetic-Metric-Torsion perspective
• Generalized phenomenological models of dark energy
• Bayesian deep learning for dark energy
• Unified dark fluid with null sound speed as an alternative to phantom dark energy
• Evidence for the dynamical dark energy with evolving Hubble constant
• Gravitational waves during inflation from a 5D large-scale repulsive gravity model
• Phenomenological models of Universe with varying $G$ and $\Lambda$
• Observational constraints using Bayesian statistics and Deep Learning in $f(Q)$ gravity
• Impact of dark energy on the equation of state in light of the latest cosmological data
• Investigating the Origin of CMB Large-Scale Features Using LiteBIRD and CMB-S4
• Cosmological consequences of a scalar field with oscillating equation of state. IV. Primordial nucleosynthesis and the deuterium problem
• Entropic mechanisms with generalized scalar fields in the Ekpyrotic universe
• Cosmological constraints for the Cosmic Defect theory
• Space-time evolution induced by spinor fields with canonical and non-canonical kinetic terms
• Crossing the phantom divide with a classical Dirac field
• Time-Dependent Scalar Fields in Modified Gravities in a Stationary Spacetime
• Interacting Tsallis agegraphic dark energy in DGP Braneworld Cosmology
• Dark Energy and Extending the Geodesic Equations of Motion: Its Construction and Experimental Constraints
• Interacting Induced Dark Energy Model
• Interaction of Neutrinos with a Cosmological K-essence Scalar
• Null geodesic structure for the Barriola-Vilenkin spacetime via $k$-essence
• Post-Newtonian Binary Dynamics in Effective Field Theory of Horndeski Gravity
• Constraining hybrid potential scalar field cosmological model in Lyra's geometry with recent observational data
• Non-Gaussianity of the density distribution in accelerating universes
• Nonlinear power spectrum in clustering and smooth dark energy models beyond the BAO scale
• Fate of homogeneous ${\mathbb{Z}}_2$-symmetric scalar condensates
• Some studies on dark energy related problems
• Hidden Sectors in String Theory: Kinetic Mixings, Fifth Forces and Quintessence
• The coincidence problem in $f(R)$ gravity models
• Evolution of Dark Energy Perturbations for Slotheon Field and Power Spectrum
• Spatial correlations of dark energy from quantum fluctuations in inflation
• Prospects of probing dark energy with eLISA: Standard versus null diagnostics
• Algebraic expansions for curvature coupled scalar field models
• The Stringy Origins of Galileons and their Novel Limit
• DBI analog of a decaying vacuum cosmology
• Enhanced power of gravitational waves and rapid coalescence of black hole binaries through dark energy accretion
• Gravitation with modified fluid Lagrangian: Variational principle and an early dark energy model
• Thermodynamics of a Non-canonical $f(\bar{R},\bar{T})$ gravity
• Large black-hole scalar charges induced by cosmology in Horndeski theories
• Probing Dark Energy Properties in $fQ,C)$ Gravity with FLRW Cosmological Models
• A new instability in clustering dark energy?
• Non Singular Origin of the Universe and the Cosmological Constant Problem (CCP)
• Recent Developments in Degenerate Higher Order Scalar Tensor Theories
• Cosmological Unification, Dark Energy and the Origin of Neutrino Mass
• Constraints on dark energy evolution
• $k$-essence for warm inflation on the brane
• Constraints on Holographic cosmologies from strong lensing systems
• Cosmological Evolution of Viscous Dark Energy in f(Q,C) Gravity: Two-Fluid Approach
• Pseudo Newtonian Potential For a Rotating Kerr Black Hole Embedded in Quintessence
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Phase structure of the $O(2)$ ghost model with higher-order gradient term
• Accelerating Universes from Short-Range Interactions
• Theory of interacting vector dark energy and fluid
• Cosmic Evolution of the Kantowski-Sachs Universe in the Context of a Bulk Viscous String in Teleparallel Gravity
• Inflation is the generic feature of phantom field-not the big-rip
• Effect of Dark Energy Perturbation on Cosmic Voids Formation
• Observational constraints on a Yang-Mills condensate dark energy model
• Effective field theory of coupled dark energy and dark matter
• Hamilton-Jacobi formalism for k-inflation
• Intermediate inflation or late time acceleration?
• Diagnostic Approaches for Interacting generalized holographic Ricci Dark Energy Models
• Realizing the phantom-divide crossing with vector and scalar fields
• Generalized Ghost Pilgrim Dark Energy Fractal Cosmology with Observational Constraint
• Screening fifth forces in scalar-vector-tensor theories
• Higher Dimensional Cosmology with Some Dark Energy Models in Emergent, Logamediate and Intermediate Scenarios of the Universe
• Neutrino Lorentz invariance violation from the CPT-even SME coefficients through a tensor interaction with cosmological scalar fields
• Scalar Field, Four Dimensional Spacetime Volume and the Holographic Dark Energy
• Dark matter halos modeled by polytropic spheres influenced by the relict cosmological constant and trapping polytropes forming supermassive black holes
• On the Field Theoretical Description of an Alternative Model to Generalized Chaplygin Gas and its Thermodynamic Behaviour
• Observational constraints on the massive neutrinos induced late-time cosmic acceleration
• Shock waves as branes with throats
• Vacuum Energy and Renormalization of the Field-Independent Term
• On A Cosmological Invariant as an Observational Probe in the Early Universe
• Coincidence Problem in Cyclic Phantom Models of the Universe
• Non-Affine Extensions of the Raychaudhuri Equation in the K-essence Framework
• Potentials of Coupled Quintessence Based on a Dilaton
• Multi-pole Dark Energy
• Constraining Chaplygin models using diffuse supernova neutrino background
• A novel two-field pure K-essence for inflation, dark matter, dark energy and black holes
• Possible relationship between initial conditions for inflation and past geodesic incompleteness of the inflationary spacetime
• Loops in inflation with strongly non-geodesic motion
• The electromagnetic coupling and the dark side of the Universe
• Perturbative treatment of the luminosity distance
• The Fourth Gravity Test and Quintessence Matter Field
• Cosmic scalar fields with flat potential
• Quintom Dark Energy: Future Attractor and Phantom Crossing in Light of DESI DR2 Observation
• General Coordinate Transformations as the Origins of Dark Energy
• New twinlike models for scalar fields
• Gravitational lenses in the dark Universe
• The Effects of Tachyonic and Phantom Fields in the Intermediate and Logamediate Scenarios of the Anisotropic Universe
• A Post-Newtonian Analysis of Regularized 4D-EGB Theory: Complete Set of PPN Parameters and Observational Constraints
• Black hole free energy during charged collapse: a numerical study
• FLRW Cosmology of Induced Dark Energy Model and Open Universe
• Time dependent dark energy and the thermodynamics of many-body systems
• On the asymmetric non-canonical braneworld in five dimensions
• Exploring the evolution of structure growth in the universe with field-fluid interactions through dynamical stability analysis
• Assessing the viability of successful reconstruction of the dynamics of dark energy using varying fundamental couplings
• Phenomenologically varying $\Lambda$ and a toy model for the Universe
• Clusternets: A deep learning approach to probe clustering dark energy
• Classical and quantum cosmology of $K$-essentially modified $R^2$ and pure $R^p$ gravity
• Cosmological constraints on a dark energy model with a non-linear scalar field
• The role of potential in the ghost-condensate dark energy model
• From Dark Radiation to Dark Energy: Unified Cosmological Evolution in K-essence Models
• Interacting dark fluid in the universe bounded by event horizon : A non-equilibrium prescription
• Faster-Than-Light Solitons in 1 + 1 Dimensions
• Neutrino Interactions with perturbed Rastall Gravity: A Novel Approach to Reducing the Hubble Tension
• Generalized Three-Form Field
• A scaling invariance of the perturbations in $k$-inflation models
• Supersymmetric extensions of K field theories
• Vortices in vacuumless systems
• Dynamical Dark Energy Signatures from a New Transition $Om(z)$ Parametrization in Flat FLRW Cosmology
• Late time acceleration in 3-brane Brans-Dicke cosmology
• Exact solution and exotic fluid in cosmology
• Particle Production Scenario in an Algebraically Coupled Quintessence Field with a Dark Matter Fluid
• 4G: Pure fourth-order gravity
• Dark energy from quantum wave function collapse of dark matter
• Observational constraints on generic models of non-minimal curvature-matter coupling
• Quintessence, Unified Dark Energy and Dark Matter, and Confinement/Deconfinement Mechanism
• K-essential covariant holography
• Quasinormal modes of the Hayward black hole surrounded by quintessence: scalar, electromagnetic and gravitational perturbations
• Red-shift parametrizations of dark energy and observational constraint on their parameters: Galileon gravity as background
• The Dynamics of Inhomogeneous Dark Energy
• Weak Gravity Conjecture and Holographic Dark Energy Model with Interaction and Spatial Curvature
• Metric-Independent Volume-Forms in Gravity and Cosmology
• Galilean symmetry in generalized abelian Schrödinger-Higgs models with and without gauge field interaction
• Non-canonical 3-form dark energy
• How does Inflation Depend Upon the Nature of Fluids Filling Up the Universe in Brane World Scenario
• Thermodynamic modifications to Bardeen black holes surrounded by quintessence based on the new higher order GUP
• Dark energy without fine tuning
• Evolution of perturbations in a universe with exotic solid-like matter
• Toy models of Universe with an Effective varying $\Lambda$-Term in Lyra Manifold
• Entropy Bounds and Holographic Dark Energy: Conflicts and Consensus
• Interacting Dark Energy and Its Implications for Unified Dark Sector
• Reconstructing cosmic evolution with a density parametrization
• Propagation Constraints and Classical Solutions in K-essence Like Theories
• Observational constraints on thawing quintessence scalar field model
• Generalized Galileon Scenario Inspires Chaotic Inflation
• K-nonizing
• Can the Baryon Number Density and the Cosmological Constant be interrelated?
• Phenomenological aspects of dark energy dominated cosmologies
• Modified cosmology through generalized mass-to-horizon entropy: implications for structure growth and primordial gravitational waves
• A dynamical dark energy model with a given luminosity distance
• Toward solving the cosmological constant problem by embedding
• Thermodynamical aspects of modified holographic dark energy model
• Perturbations of Einstein--Maxwell--phantom spacetime: Instabilities of charged Ellis--Bronnikov wormholes and quasinormal modes of black holes
• A comprehensive dynamical and phenomenological analysis of structure growth in curvature-modulated coupled quintessence scenario
• Dark energy with oscillatory tracking potential: Observational Constraints and Perturbative effects
• Dynamical analysis of Brans-Dicke Universe with inverse power-law effective potential
• Vortices in Maxwell-Higgs models with a global factor
• Cosmology via Metric-Independent Volume-Form Dynamics
• A Jacobian generalization of the pseudo Nambu-Goldstone bosons potential
• An exotic k-essence interpretation of interactive cosmological models
• K-essential Phantom Energy: Doomsday around the Corner? Revisited
• Stability Analysis of DGP Brane-world Model with Agegraphic Dark Energy
• Towards the unification of late-time acceleration and inflation by k-essence model
• Self-dual configurations in a generalized Abelian Chern-Simons-Higgs model with explicit breaking of the Lorentz covariance
• Probing Time-Dependent Dark Energy with the Flux Power Spectrum of the Lyman $\alpha$ Forest
• Modified scaling in $k$-essence model in interacting dark energy - dark matter scenario
• Dynamics of scalar fields in an expanding/contracting cosmos at finite temperature
• Q-balls in K-field theory
• Quintessence and false vacuum: Two sides of the same coin?
• K-essence sources of Kerr-Schild spacetimes
• Constant Roll Inflationary Dynamics with Generalized Potentials in $f(R,\varphi ,X)$ Gravity
• Effects of Cuscuton dynamics on braneworld configurations in the scalar-tensor representation of $f\left(R,T\right)$ gravity
• Chiral Dirac-Born-Infeld solitons with SDiff symmetry
• Cosmological Dynamics of Exponential Quintessence Constrained by BAO, Cosmic Chronometers, and DES-SN5YR/Pantheon+ Data
• Extremal cosmological black holes in Horndeski gravity and the anti-evaporation regime
• Dark Energy from Time Crystals
• Expanding Universe: Thermodynamical Aspects From Different Models
• Domain walls without a potential
• A Bit Rate Bound on Superluminal Communication
• Dark energy constraints in light of theoretical priors
• Semi-holographic model revisited
• Thermodynamics of irreversible particle creation phenomena and its cosmological consequence
• Complete factorization of equations of motion for generalized scalar field theories
• $\Lambda$CDM from broken diffeomorphisms
• Geometric formulation of $k$-essence and late-time acceleration
• Solar System and Atomic Clock Bounds on Locally Coupled Swampland Scalars
• Quantum Quintom Cosmology
• Parametrization of Born-Infeld Type Phantom Dark Energy Model
• Particle Cosmology
• Reconstructing square-law k-inflation from Planck data
• Running Einstein Constant and a Possible Vacuum State of the Universe
• Structure formation in a non-canonical scalar field model of clustering dark energy
• An effective fluid description of scalar-vector-tensor theories under the sub-horizon and quasi-static approximations
• Cosmology in the presence of diffeomorphism-violating, nondynamical background fields
• The creation of radiation and the relic of inflaton potential
• Nonlinear matter terms in general scalar-tensor braneworld cosmology
• Masking a singularity with k-essence fields in an emergent gravity metric
• Phantom Crossing with Quintom Models
• Dynamical analysis of $k$-essence cosmology in the light of Supernova Ia observations
• First order framework for gauge k-vortices
• The Possibility of Tachyons as Soliton Solutions in 3+1 Dimensions via k-field Models
• Hamilton-Jacobi analysis of noncanonical inflation in $f(R,T)$ gravity: Constraints from Planck/ACT data, and theoretical bounds
• Perturbations and stability conditions of k-essence and kinetic gravity braiding models in two-field measure theory
• The relation between Geometry and Matter in classical and quantum Gravity and Cosmology
• Kinetically-driven ekpyrosis
• The Nature of Phantom Dark Energy and its Relation to Time Crystals
• Cosmic evolution of scalar fields with multiple vacua: generalized DBI and quintessence
• Dark Energy: relating the evolution of the universe from the past to the future
• DUCA: Dynamic Universe Cosmological Analysis. II. The impact of clustering dark energy on the halo mass function
• Hamilton-Jacobi formalism for Generalized Chaplygin Gas models
• Criticality and Big Brake singularities in the tachyonic evolutions of closed Friedmann universes with cold dark matter
• Linearized Treatment of Scalar perturbations in the Asymptotic Cosmological Model
• Sources of matter for wormholes in a k-essence theory
• Sound Mode and Scale-Dependent Growth in Two-Fluid Dynamical Dark Energy
• Running Hubble Constant with the Redshift as a Marker of Evolutionary Dark Energy
• Stability of the accretion of a ghost condensate onto the Schwarzschild black hole
• The four fixed points of scale invariant single field cosmological models
• Non-singular Bouncing Cosmology in $f(R,G,T)$--Quintom model
• Cosmological Kinetic Mixing
• Primordial black hole formation in k-inflation models