Essentials of k-essence

Abstract

We recently introduced the concept of "k-essence" as a dynamical solution for explaining naturally why the universe has entered an epoch of accelerated expansion at a late stage of its evolution. The solution avoids fine-tuning of parameters and anthropic arguments. Instead, k-essence is based on the idea of a dynamical attractor solution which causes it to act as a cosmological constant only at the onset of matter-domination. Consequently, k-essence overtakes the matter density and induces cosmic acceleration at about the present epoch. In this paper, we present the basic theory of k-essence and dynamical attractors based on evolving scalar fields with non-linear kinetic energy terms in the action. We present guidelines for constructing concrete examples and show that there are two classes of solutions, one in which cosmic acceleration continues forever and one in which the acceleration has finite duration.

14 pages, 11 figures

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• Statefinder diagnosis and the interacting ghost model of dark energy
• Constant-roll $k$-Inflation Dynamics
• Growth of curvature perturbations for PBH formation \& detectable GWs in non-minimal curvaton scenario revisited
• An exploration of an early gravity transition in light of cosmological tensions
• Evolution of Dark Energy Perturbations in Scalar-Tensor Cosmologies
• Post-Newtonian Approximation of Teleparallel Gravity Coupled with a Scalar Field
• Modified Einstein and Finsler Like Theories on Tangent Lorentz Bundles
• Interacting two-component fluid models with varying EoS parameter
• Linearization of thick K-branes
• Cosmological consequences of a principle of finite amplitudes
• Polytropic dark matter flows illuminate dark energy and accelerated expansion
• Dynamical stability of K-essence field interacting non-minimally with a perfect fluid
• Exploring the Dark Universe: constraints on dynamical Dark Energy models from CMB, BAO and growth rate measurements
• Supersymmetric K field theories and defect structures
• Brane inflation driven by noncanonical scalar field
• Testing gravity with $E_G$: mapping theory onto observations
• The $H_0$ Tension in Non-flat QCDM Cosmology
• Post-Planck Dark Energy Constraints
• An equation of state for purely kinetic k-essence inspired by cosmic topological defects
• The Hawking temperature in the context of dark energy
• A comprehensive numerical study on four categories of holographic dark energy models
• Probing Inflation and Dark Energy with Current Cosmological Observations
• Fast full $N$-body simulations of generic modified gravity: derivative coupling models
• Non-linear gravitational clustering in scalar field cosmologies
• Dark energy reconstruction based on the PADE approximation; an expansion around the $\Lambda$CDM
• Modified Chaplygin Gas Cosmology with Bulk Viscosity
• Observational constraint on the interacting dark energy models including the Sandage-Loeb test
• Why Does Gravity Ignore the Vacuum Energy?
• Atypical k-essence cosmologies
• Background cosmological dynamics in $f(R)$ gravity and observational constraints
• Statefinder diagnosis for holographic dark energy in the DGP braneworld
• Supersymmetric extensions of k-field models
• Two Component Model of Dark Energy
• K-essence Models and Cosmic Acceleration in Generalized Teleparallel Gravity
• Fractional-order derivatives in cosmological models of accelerated expansion
• BPS solitons in a Dirac-Born-Infeld action
• Evaluation of cosmological models in $f(R,T)$ gravity in different dark energy scenario
• Twinlike models with identical linear fluctuation spectra
• Duality between k-essence and Rastall gravity
• Restoring New Agegraphic Dark Energy in RS II Braneworld
• Quintessence dynamics with two scalar fields and mixed kinetic terms
• Tracking Quintessence Would Require Two Cosmic Coincidences
• Cosmic acceleration in non-canonical scalar field model - An interacting scenario
• Perturbative approach for mass varying neutrinos coupled to the dark sector in the generalized Chaplygin gas scenario
• Diagnosing holographic dark energy models with statefinder hierarchy
• Scalar field as a perfect fluid: thermodynamics of minimally coupled scalars and Einstein frame scalar-tensor gravity
• The Accelerated Acceleration of the Universe
• Suppressing Quantum Fluctuations in Classicalization
• Dark-Energy Dynamics Required to Solve the Cosmic Coincidence
• Testing modified gravity models with recent cosmological observations
• General formulation of cosmological perturbations in scalar-tensor dark energy coupled to dark matter
• Tachyon Matter in Loop Quantum Cosmology
• Interacting Dark Energy in Hořava-Lifshitz Cosmology
• Star tracks in the ghost condensate
• Assisted dark energy
• Strongly Coupled Quintessence
• Braneworld in $f(T)$ Gravity Theory with Noncanonical Scalar Matter Field
• Reconstructing generalized ghost condensate model with dynamical dark energy parametrizations and observational datasets
• Classical and quantum cosmology of Born-Infeld type models
• Constraining a possible time variation of the gravitational constant G with terrestrial nuclear laboratory data
• Dynamical Dark Energy Implies a Coupled Dark Sector: Insights from DESI DR2 via a Data-Driven Approach
• Gravity-Assisted Emergent Higgs Mechanism in the Post-Inflationary Epoch
• Approximation of the potential in scalar field dark energy models
• Cosmological model of the interaction between dark matter and dark energy
• G-essence with Yukawa Interactions
• A magnified glance into the dark sector: probing cosmological models with strong lensing in A1689
• Tracking quintessence and k-essence in a general cosmological background
• Null Energy Condition Violation and Classical Stability in the Bianchi I Metric
• Non singular bounce in modified gravity
• Exploring the Sharma-Mittal HDE models with different diagnostic tools
• Full Investigation on the Dynamics of Power-Law Kinetic Quintessence
• Extended Phase Space Analysis of Interacting Dark Energy Models in Loop Quantum Cosmology
• Clustering dark energy and halo abundances
• Effects of ghost dark energy perturbations on the evolution of spherical overdensities
• Revisit of constraints on holographic dark energy: SNLS3 dataset with the effects of time-varying $\beta$ and different light-curve fitters
• Symmetry inheritance of scalar fields
• Radial oscillations and tidal Love numbers of dark energy stars
• Interacting viscous ghost tachyon, K-essence and dilaton scalar field models of dark energy
• Spin-orbit effects for compact binaries in scalar-tensor gravity
• The dynamical viability of scalar-tensor gravity theories
• Connecting The Non-Singular Origin of the Universe, The Vacuum Structure and The Cosmological Constant Problem
• Is the DBI scalar field as fragile as other $k$-essence fields?
• Generalized Chaplygin gas model: Cosmological consequences and statefinder diagnosis
• Generalized Holographic Dark Energy and its Observational Constraints
• Kinetically coupled dark energy
• Dark Energy and the MSSM
• Structure formation in Multiple Dark Matter cosmologies with long-range scalar interactions
• Growth of matter overdensities in non-minimal torsion-matter coupling theories
• G-essence cosmologies with scalar-fermion interactions
• Black Hole Ringdown as a Probe for Dark Energy
• Generalized interacting Barrow Holographic Dark Energy: cosmological predictions and thermodynamic considerations
• Cosmological dynamics of $f(R)$ gravity scalar degree of freedom in Einstein frame
• Cosmological black holes from self-gravitating fields
• k-stabilization in brane models
• Agegraphic Dark Energy Model in Non-Flat Universe: Statefinder Diagnostic and $w-w^{\prime }$ Analysis
• Measuring Unified Dark Matter with 3D Cosmic Shear
• Cosmology of non-minimal derivative coupling to gravity in Palatini formalism and its chaotic inflation
• Anthropic versus cosmological solutions to the coincidence problem
• Exploring the evolution of color-luminosity parameter $\beta$ and its effects on parameter estimation
• An effective quintessence field with a power-law potential
• Understanding the origin of CMB constraints on Dark Energy
• Optimal parameterizations for observational constraints on thawing dark energy
• Investigating the accelerated expansion of the Universe through updated constraints on viable $f(R)$ models within the metric formalism
• Parametrising non-linear dark energy perturbations
• Quintessential Cosmological Tensions
• Probing Cosmic Acceleration by Using the SNLS3 SNIa Dataset
• Dynamical systems analysis of tachyon dark energy model from a new perspective
• The phase-space of generalized Gauss-Bonnet dark energy
• Compatibility between the scalar field models of tachyon, $k$-essence and quintessence in $f(R,T)$ gravity
• Holographic kinetic k-essence model
• Can phantom transition at $z\sim 1$ restore the Cosmic concordance?
• The Influence of Free Quintessence on Gravitational Frequency Shift and Deflection of Light with 4D momentum
• First Order Formalism for Generalized Vortices
• Brans-Dicke Scalar Field as a Unique k-essence
• A short review on clustering dark energy
• Reconstruction of scalar potentials in two-field cosmological models
• Phenomenological Fluids from Interacting Tachyonic Scalar Fields
• Physical Parameters for Stable $f(R)$ Models
• Constraining the dark energy dynamics with the cosmic microwave background bispectrum
• Tidal Love Numbers from EFT of Black Hole Perturbations with Timelike Scalar Profile
• Cuscuton kinks and branes
• A one-parameter formula for testing slow-roll dark energy: observational prospects
• Spherical collapse model and cluster number counts in power law $f(T)$ gravity
• Constraints on field flows of quintessence dark energy
• Spherical collapse in the extended quintessence cosmological models
• Boson stars in Palatini $f(\mathcal{R})$ gravity
• Late-time acceleration with a scalar field source: Observational constraints and statefinder diagnostics
• Detectable primordial non-gaussianities and gravitational waves in k-inflation
• Scalar Fields Near Compact Objects: Resummation versus UV Completion
• Dynamical Stability in presence of non-minimal derivative dependent coupling of $k$-essence field with a relativistic fluid
• The general form of the coupled Horndeski Lagrangian that allows cosmological scaling solutions
• Probing for the Cosmological Parameters with PLANCK Measurement
• Primordial magnetic helicity evolution with a homogeneous magnetic field from inflation
• Dynamical Systems Analysis of K-essence Model
• Dark Energy: The Shadowy Reflection of Dark Matter?
• Dynamical system analysis for DBI dark energy interacting with dark matter
• Primordial Magnetic Fields from Dark Energy
• Anisotropic singularities in modified gravity models
• Tsallis holographic model of dark energy: Cosmic behaviour, statefinder analysis and ${\omega }_D-{\omega }_D^{\prime }$ pair in the non-flat universe
• Mass-Temperature relation in $\Lambda$CDM and modified gravity
• Classical and quantum Big Brake cosmology for scalar field and tachyonic models
• Renormalization Ambiguities and Conformal Anomaly in Metric-Scalar Backgrounds
• Self-reproduction in k-inflation
• Extended family of generalized Chaplygin gas models
• Evidence for the Fifth Element Astrophysical status of Dark Energy
• Light of Planck-2015 on Non-Canonical Inflation
• Wave propagation and shock formation in the most general scalar-tensor theories
• Thermodynamics of Spinor Quintom
• Cosmological Acceleration Through Transition to Constant Scalar Curvature
• Parameterizing and Measuring Dark Energy Trajectories from Late-Inflatons
• Casimir Dark Energy, Stabilization of the Extra Dimensions and Gauss-Bonnet Term
• Testing the interaction model with cosmological data and gamma-ray bursts
• Clustering dark energy imprints on cosmological observables of the gravitational field
• Dark Energy within the Generalized Uncertainty Principle in Light of DESI DR2
• Cosmological nonlinear structure formation in full general relativity
• The unification of inflation and late-time acceleration in the frame of $k$-essence
• Cosmic Degeneracy with Dark Energy Equation of State
• Dilaton Coupled Quintessence Model in the $\omega -{\omega }^{\prime }$ Plane
• Probing the speed of gravity with LVK, LISA, and joint observations
• Parametrization of K-essence and Its Kinetic Term
• Running of the Running and Entropy Perturbations During Inflation
• Heteroclinic orbit and tracking attractor in cosmological model with a double exponential potential
• Holographic dark energy with the sign-changeable interaction term
• Attractor Solution in Coupled Yang-Mills Field Dark Energy Models
• A comprehensive parametrization approach for the Hubble parameter in scalar field dark energy models
• Born-Infeld Type Phantom Model in the $\omega -{\omega }^{\prime }$ Plane
• 50 Years of Horndeski Gravity: Past, Present and Future
• Einstein-Cartan gravity with scalar-fermion interactions
• Ghost condensates and pure kinetic $k$-essence condensates in presence of field-fluid non-minimal coupling in the dark sector
• Constraining the interaction between dark sectors with future HI intensity mapping observations
• Thawing models in the presence of a generalized Chaplygin gas
• Imprints of interacting dark energy on cosmological perturbations
• Networks of cosmological histories, crossing of the phantom divide line and potentials with cusps
• Cosmology With Non-Minimally Coupled K-Field
• Exact and slow-roll solutions for exponential power-law inflation connected with f(R) gravity and observational constraints
• IDECAMB: an implementation of interacting dark energy cosmology in CAMB
• Dark energy and supermassive black holes
• Modified gravity and cosmology with nonminimal (derivative) coupling between matter and the Einstein tensor
• Growth of Matter Perturbations in the Bi-Galileons Field Model
• Cosmological aspects of $f(R,T)$ gravity in a simple model with a parametrization of $q$
• New Results on Compact Structures
• Cosmological dynamics of the general non-canonical scalar field models
• Sounds of instability from generalized QCD ghost dark energy
• Cosmological implications of interacting polytropic gas dark energy model in non-flat universe
• A stable flat universe with variable Cosmological constant in f(R,T) Gravity
• Transition to Zero Cosmological Constant and Phantom Dark Energy as Solutions Involving Change of Orientation of Space-Time Manifold
• Anisotropic $k$-essence
• Cosmological evolution of equation of state for dark energy in G-essence models
• Interacting Tsallis and Rényi Holographic Dark Energy with Hybrid Expansion Law
• Vacuum Structure and Gravitational Bags Produced by Metric-Independent Spacetime Volume-Form Dynamics
• Accretion of Chaplygin gas upon black holes: Formation of faster outflowing winds
• Machine Learning and cosmographic reconstructions of quintessence and the Swampland conjectures
• Linear Perturbation constraints on Multi-coupled Dark Energy
• Compact boson stars in K field theories
• Cosmological Einstein-Maxwell model with $g$-essence
• Non-perturbative procedure for stable $K$-brane
• Constraints on Quintessence From Using Cosmological Data
• Dynamics of Quintessential Inflation
• The Hawking Temperature in the context of Dark Energy for Reissner-Nordstrom and Kerr background
• Cosmological constraints on dynamical dark energy model in $F(Q)$ gravity
• Off-shell Noether current and conserved charge in Horndeski theory
• Age Problem in Lemaitre-Tolman-Bondi Void Models
• Linear perturbations in K-mouflage cosmologies with massive neutrinos
• Chaplygin gas may prevent big trip
• Bouncing Cosmology in VCDM
• Raychaudhuri equation in $k$-essence geometry: conditional singular and non-singular cosmological models
• Spherical collapse model in agegraphic dark energy cosmologies
• Bags and Confinement Governed by S.S.B. of Scale Invariance
• Holographic Dark Energy Model and Scalar-Tensor Theories
• Discrimination between Lambda-CDM, quintessence, and modified gravity models using wide area surveys
• Gravitational collapse of K-essence Matter in Painlevé-Gullstrand coordinates
• Cosmological constraints on polytropic gas model
• No-go theorem for static scalar field dark matter halos with no Noether charges
• Stealth black holes in shift symmetric kinetic gravity braiding
• Scalar Field Reconstruction of Power-Law Entropy-Corrected HDE
• Gravitational resonances on $f(R)$-brane
• The Phase Space of $k$-Essence $f(R)$ Gravity Theory
• $f\left(R,{\nabla }_{{\mu }_1}R,\dots ,{\nabla }_{{\mu }_1}\dots {\nabla }_{{\mu }_n}R\right)$ theories of gravity in Einstein frame: A higher order modified Starobinsky inflation model in the Palatini approach
• Cosmological Implications of 5-dimensional Brans-Dicke Theory
• Seeding supermassive black holes with a non-vortical dark-matter subcomponent
• The Classical Stability Of The Ghost Condensate
• Configuration entropy of the Cosmic Web: Can voids mimic the dark energy?
• Lagrangian description of cosmic fluids: mapping dark energy into unified dark energy
• Dark energy, curvature, and cosmic coincidence
• A Complete Cosmological Scenario in Teleparallel Gravity
• Formation of caustics in Dirac-Born-Infeld type scalar field systems
• Energy-Momentum Squared Gravity: A Brief Overview
• Probing Dark Energy with Supernovae : a concordant or a convergent model?
• Deviation from $\Lambda$CDM: Pressure Parametrization
• Note on scalars, perfect fluids, constrained field theories, and all that
• Interacting Tsallis holographic dark energy in higher dimensional Cosmology
• A Two-field Dilaton Model of Dark Energy
• The Hawking temperature in the context of dark energy for Kerr-Newman and Kerr-Newman-AdS backgrounds
• Propagation of scalar and tensor gravitational waves in Horndeski theory
• Baryogenesis after Hyperextended Inflation
• The effective field theory of K-mouflage
• A Self-gravitating Dirac-Born-Infeld Global Monopole
• Diagnostic and Comparative Analysis of Dark Energy Models with $q(z)$ Parametrizations
• Future supernova probes of quintessence
• Primordial black holes from temporally enhanced curvature perturbation
• Roles of Modified Chaplygin-Jacobi and Chaplygin-Abel Gases in FRW Universe
• The relation between cosmological redshift and scale factor for photons
• Dark D-Brane Cosmology: from background evolution to cosmological perturbations
• $K$-field kinks: stability, exact solutions and new features
• Constraining Thawing Quintessence
• QCD modified ghost scalar field dark energy models
• Cosmological perturbations in $k$-essence model
• Observed galaxy power spectrum in cubic Galileon model
• Influences of Dark Energy and dark matter on Gravitational Time Advancement
• Attracted to de Sitter: cosmology of the linear Horndeski models
• Lagrangian reconstruction of Barrow holographic dark energy in interacting tachyon model
• Cosmological Probes of Structure Growth and Tests of Gravity
• Cosmological dark fluid from five-dimensional vacuum
• Cosmological Constraints on Ghost Dark Energy in the Brans-Dicke Theory by Using MCMC Approach
• Forecast constraints on Anisotropic Stress in Dark Energy using gravitational-waves
• Gaussian-process reconstructions and model building of quintom dark energy from latest cosmological observations
• Evolution of perturbations in distinct classes of canonical scalar field models of dark energy
• Vacuum Solution of a Linear Red-Shift Based Correction in $f(R)$ Gravity
• The two-body potential of Vainshtein screened theories
• Constraints on the generalized tachyon field models from latest observational data
• A transition between bouncing hyper-inflation to ΛCDM from diffusive scalar fields
• Structure formation in dark energy cosmologies described by PADE parameterization
• The Maxwell-Chern-Simons gravity and its cosmological implications
• Vector dark energy models with quadratic terms in the Maxwell tensor derivatives
• Generalized Galileon Model -- cosmological reconstruction and the Vainshtein mechanism --
• Thawing Versus. Tracker Behaviour: Observational Evidence
• Probing for Dynamics of Dark-Energy in Mass Varying Neutrinos: Cosmic Microwave Background Radiation and Large Scale Structure
• Analytic Solutions and Observational support: A study of $f(R,T)$ gravity with $f(R,T)=R+h(T)$
• Dark Energy and Neutrino CPT Violation
• Holographic dark energy described at the Hubble length
• Quintessence as k-essence
• CMB constraints on DHOST theories
• Supernova constraints on Multi-coupled Dark Energy
• R\' enyi Holographic Dark Energy in Higher Dimension Cosmology
• Analytic vortex solutions in generalized models of the Maxwell-Higgs type
• Effects of a time-varying color-luminosity parameter $\beta$ on the cosmological constraints of modified gravity models
• Late time accelerated scaling attractors in DGP (Dvali-Gabadadze-Porrati) braneworld
• Observational constraints to a phenomenological $f\left(R,\nabla R\right)$-model
• De-Sitter nonlinear sigma model and accelerating universe
• Growth of structures and redshift-space distortion data in scale-dependent gravity
• Emergent Universe in the Braneworld Scenario
• Statefinder parameters for quantum effective Yang-Mills condensate dark energy model
• Cosmological evolution of viable models in the generalized scalar-tensor theory
• Superluminality in DHOST theory with extra scalar
• Cosmological aspects of a unified dark energy and dust dark matter model
• Einstein static universe on the brane supported by extended Chaplygin gas
• DESI constraints on $\alpha$-attractor inflationary models
• Observable Gravitational Waves from Hyperkination in Palatini Gravity and Beyond
• On horizons and wormholes in k-essence theories
• Twinlike Models for Kinks, Vortices and Monopoles
• Cosmological Constraints on the DGP braneworld model with Gamma-ray bursts
• Perfect fluid in Lagrangian formulation due to generalized three-form field
• Mutually interacting Tachyon dark energy with variable $G$ and $\Lambda$
• Cosmological Parameter Determination from Counts of Galaxies
• Non-virialised clusters for detection of Dark Energy-Dark Matter interaction
• Periodic Cosmological Evolutions of Equation of State for Dark Energy
• Investigating clustering dark energy with 3d weak cosmic shear
• Exact Scalar-Tensor Cosmological Solutions via Noether Symmetry
• BPS bounds in supersymmetric extensions of K field theories
• Curvaton reheating in a Scale Invariant Two Measures Theory
• Expanding Universe: slowdown or speedup?
• K-essence and kinetic gravity braiding models in two-field measure theory
• Cosmological constraints from low-redshift data
• Kinks in higher derivative scalar field theory
• Compact Chern-Simons vortices
• Dynamics of Polynomial Chaplygin Gas Warm Inflation
• A Dark Energy Model in Lyra Manifold
• Interacting Ghost Dark Energy in Complex Quintessence Theory
• 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
• Dynamics of interacting scalar field model in the realm of chiral cosmology
• Superconducting dark energy
• Reducing the $H_0$ Tension with Exponential Acoustic Dark Energy
• Repulsive gravity model for dark energy
• Collapsing scenario for the k-essence emergent generalised Vaidya spacetime in the context of massive gravity's rainbow
• Quintom dark energy in DGP braneworld cosmology
• A Positive Energy Theorem for P(X,phi) Theories
• Constraints on the symmetry noninheriting scalar black hole hair
• Impact of generalized dissipative coefficient on warm inflationary dynamics in the light of latest Planck data
• Scalar-tensor cosmologies without screening
• Thermodynamics for the k-essence Emergent Reissner-Nordstrom-de Sitter Spacetime
• Compact astrophysical objects in modified gravity
• Combined cosmological tests of a bivalent tachyonic dark energy scalar field model
• Constraining dark energy using the cross correlations of weak lensing with post-reionization probes of neutral hydrogen
• $Om$ Diagnostic for Dilaton Dark Energy
• Marginalized Fisher Forecast for Horndeski Dark Energy Models
• Whether Lyra's Manifold Itself is a Hidden Source of Dark Energy
• Causality, shocks and instabilities in vector field models of Lorentz symmetry breaking
• Thermodynamics in the universe described by the emergence of the space and the energy balance relation
• Holographic dark energy with time varying $c^2$ parameter
• Cosmic Voids in Evolving Dark Sector Cosmologies: the Low Redshift Universe
• Constraints on tachyon inflationary models with an AdS/CFT correspondence
• Logarithm of the scale factor as a generalised coordinate in a lagrangian for dark matter and dark energy
• Dark sector evolution in Horndeski models
• Time warps
• A Modified Generalized Chaplygin Gas as the Unified Dark Matter-Dark Energy Revisited
• Inflation and late-time accelerated expansion driven by $k$-essence degenerate dynamics
• Dynamics of viable $f(R)$ dark energy models in the presence of Curvature-Matter interactions
• Gravitational metamaterials from optical properties of spacetime media
• The Natural TeV Cutoff of the Higgs Field from the Multiplicative Lagrangian
• Conformally and Disformally Coupled Vector field Models of Dark Energy
• Topological structures in a non-canonical perturbative dynamics of a cuscuton-like model
• A stringy perspective on the coincidence problem
• Comparing teh holographic principle inspired dark energy models
• Stability of kinklike structures in generalized models
• Constraints on interacting dynamical dark energy and a new test for $\Lambda$CDM
• Cosmic Voids in Evolving Dark Sector Cosmologies: the High Redshift Universe
• Linear Stability of $f(R,\varphi ,X)$ Thick Branes: Tensor Perturbations
• Resonant amplification of curvature perturbations in inflation model with periodical derivative coupling
• Some solutions for one of the cosmological constant problems
• Power-Law and Logarithmic Entropy-Corrected Ricci Viscous Dark Energy and Dynamics of Scalar Fields
• Deviation From ΛCDM With Cosmic Strings Networks
• Cosmological constraints on a dark matter -- dark energy interaction
• Resurrecting the exponential and inverse power-law potentials in non-canonical inflation
• The $k$-essence scalar field in the context of Supernova Ia Observations
• Cosmological constraints on a unified dark matter-energy scalar field model with fast transition
• Observational Constraints on the Generalized Chaplygin Gas
• Role of matter in extended quasidilaton massive gravity
• 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
• Cosmological dynamics of scalar fields with O(N) symmetry
• Exponential Potentials and Attractor Solution of Dilatonic Cosmology
• Cosmological Scaling Solutions with Tachyon:Modified Gravity Model
• A study on relativistic lagrangian field theories with non-topological soliton solutions
• Dark Energy as Double N-Flation--Observational Predictions
• Implications of JLA data for $k-$essence model of dark energy with given equation of state
• Varying-Alpha and K-Essence
• Cosmographic analysis of sign-switching dark energy
• $f(\bar{R},L(X))$-gravity in the context of dark energy with power law expansion and energy conditions
• Holographic Dark Energy and Quantum Entanglement
• Deformation of Axion Potentials: Implications for Spontaneous Baryogenesis, Dark Matter, and Isocurvature Perturbations
• Cosmic acceleration and phantom crossing in $f(T)$-gravity
• $f(Q,T)$ gravity: From early to late-time cosmic acceleration
• Numerical Relativity and High Energy Physics: Recent Developments
• Warm inflation with non-comoving scalar field and radiation fluid
• Failures of homogeneous and isotropic cosmologies in Extended Quasi-Dilaton Massive Gravity
• Supersymmetric k-defects
• Emergent Cosmos in Einstein-Cartan Theory
• Is the Universe Inflating? Dark Energy and the Future of the Universe
• Constraints on the speed of sound in the k-essence model of dark energy
• Configuration entropy in the $\Lambda$CDM and the dynamical dark energy models: Can we distinguish one from the other?
• Smooth crossing of $w_{\Lambda }=-1$ line in a single scalar field model
• Asymptotic behavior of $N$-fields Chiral Cosmology
• The Phantom of the New Oscillatory Cosmological Phase
• Stable phantom-divide crossing in two scalar models with matter
• The $R_{\mathrm{h}}=ct$ universe and quintessence
• TASI Lectures on Cosmic Acceleration
• Shan--Chen interacting vacuum cosmology
• Dynamical Analysis of Scalar Field Cosmologies with Spatial Curvature
• Complete Hamiltonian analysis of cosmological perturbations at all orders II: Non-canonical scalar field
• Polytropic gas scalar field models of dark energy
• Cosmology in Nonlinear Born-Infeld Scalar Field Theory With Negative Potentials
• Scalar field potentials for closed and open cosmological models
• Higher dimensional cosmological model with a phantom field
• Geodesic structure of generalized Vaidya spacetime through the K-essence
• Evolution of magnetic component in Yang-Mills condensate dark energy models
• Prospects of probing quintessence with HI 21-cm intensity mapping survey
• The interacting vacuum and tensions: a comparison of theoretical models
• Holographik, the k-essential approach to interactive models with modified holographic Ricci dark energy
• Tailoring cosmologies in cubic shift-symmetric Horndeski gravity
• Interacting Agegraphic Dark Energy Model in DGP Braneworld Cosmology: Dynamical System Approach
• On the holographic dark energy in chameleon scalar-tensor cosmology
• Tachyon model of Tsallis holographic dark energy
• Self-dual soliton solutions in a Chern-Simons-CP(1) model with a nonstandard kinetic term
• Critical collapse in K-essence models
• The role of higher derivative bulk scalar in stabilizing a warped spacetime
• A Comparison of Quintessence and Nonlinear Born-Infeld Scalar Field Using Gold Supernova data
• The B-L Phase Transition: Implications for Cosmology and Neutrinos
• Mass-Varying Massive Gravity with k-essence
• Stochastic tunneling for strongly non-Gaussian inflationary theories
• Non Singular Origin of the Universe and its Present Vacuum Energy Density
• Relativistic Corrections to the Growth of Structure in Modified Gravity
• Interacting viscous entropy-corrected holographic scalar field models of dark energy with time-varying G in modified FRW cosmology
• Dissipative quintessence, and its cosmological implications
• Singular Pöschl-Teller II potentials and gravitating kinks
• Interacting Models of Dark Energy and Dark Matter in Einstein scalar Gauss Bonnet Gravity
• Dynamical Study of DBI-essence in Loop Quantum Cosmology and Braneworld
• First-order formalism for the quintom model of dark energy
• Covariance of dark energy parameters and sound speed constraints from large HI surveys
• A primer on problems and prospects of dark energy
• K-essence scalar dark matter solitons around supermassive black holes
• Constraints on Cosmological Models from Hubble Parameters Measurements
• Reconstruction method in the kinetic gravity braiding theory with shift-symmetric
• Cosmology with a Continuous Tower of Scalar Fields
• Barrow holographic dark energy models in $f\left(Q\right)$ symmetric teleparallel gravity with Lambert function distribution
• Tachyonic (phantom) power-law cosmology
• Perturbed dark energy: classical scalar field versus tachyon
• Dynamical System Analysis of a Dirac-Born-Infeld Model : A Center Manifold Perspective
• Reconstructions of $f(\mathcal{P})$ and $f(\mathcal{Q})$ gravity models from $(m,n)$-type Barrow Holographic Dark Energy: Analysis and Observational Constraints
• Self-tuning kinetic gravity braiding: Cosmological dynamics, shift symmetry, and the tadpole
• Supersymmetric galileons and auxiliary fields in 2+1 dimensions
• Ghost dark energy with sign-changeable interaction term
• Lagrangian formulation for an extended cosmological equation-of-state
• Collapsing scenarios of K-essence generalized Vaidya spacetime under $f(\bar{R},\bar{T})$ gravity
• Generalized sine-Gordon solitons
• Reconstruction of f-essence and fermionic Chaplygin gas models of dark energy
• Non-Stationary Dark Energy Around a Black Hole
• Effect of low anisotropy on cosmological models by using supernova data
• Cosmological effects on $f(\bar{R},\bar{T})$ gravity through a non-standard theory
• Presence of anisotropic pressures in Lemaître-Tolman-Bondi cosmological models
• Modified Gravity and Inflaton Assisted Dynamical Generation of Charge Confinement and Electroweak Symmetry Breaking in Cosmology
• Quintessence models with an oscillating equation of state and their potentials
• Non-minimally Coupled Tachyon Field in Teleparallel Gravity
• An interacting holographic dark energy model within an induced gravity brane
• A Note on Spontaneously Broken Lorentz Invariance
• Non-canonical kinetic structures in the swampland
• Non-local scalar fields inflationary mechanism in light of Planck $2013$
• Hidden from view: Coupled Dark Sector Physics and Small Scales
• Reconstructing quintom from WMAP 5-year observations: Generalized ghost condensate
• The Nature of Dark Energy and Constraints on Its Hypothetical Constituents from Force Measurements
• Cosmological constraints on superconducting dark energy models
• CMB power spectrum in the emergent universe with k-essence
• The Gravitino Swampland Conjecture
• Reconstruction of the equation of state for the cyclic universes in homogeneous and isotropic cosmology
• Dynamical analysis of coupled curvature-matter scenario in viable $f(R)$ dark energy models at de Sitter phase
• Testing generalized scalar-tensor theories of gravity with clusters of galaxies
• The CIDER simulations: Nonlinear structure formation in the Constrained Interacting Dark Energy Scenario
• Relativistic effects in the large-scale structure with effective dark energy fluids
• Coupled scalar field cosmology with effects of curvature
• Dark energy with a shift-symmetric scalar field: obstacles, loophole hunting and dead ends
• Cosmological twinlike models with multi scalar fields
• Ricci curvature non-minimal derivative coupling cosmology with field re-scaling
• A new generic evolution for $k$-essence dark energy with $w\approx -1$
• Matching the linear spectra of twinlike defects
• Can acoustic and axion-like early dark energy still resolve the Hubble tension?
• Screening and degenerate kinetic self-acceleration from the nonlinear freedom of reconstructed Horndeski theories
• Testing the phenomenological interacting dark energy model with gamma-ray bursts and Pantheon+ type Ia supernovae
• Primordial perturbations and inflation in holographic cosmology
• Cosmic Microwave Background Anisotropy numerical solution (CMBAns) I: An introduction to $C_l$ calculation
• Stealth black hole perturbations in kinetic gravity braiding
• Scalar Dark Energy Models and Scalar-Tensor Gravity: Theoretical Explanations for the Accelerated Expansion of Present Universe
• The impact of the cosmological constant on past and future star formation
• Accelerated expansion of the Universe driven by G-essence
• Cosmological evolution of generalized non-local gravity
• Galactic Halos and Black Holes in Non-Canonical Scalar Field Theories
• Growth and Geometry Split in Light of the DES-Y3 Survey
• Causality and Stability from Acoustic Geometry
• Structure formation in clustering DBI dark energy model with constant sound speed
• Scalar field inflation and Shan-Chen fluid models
• Interacting Barrow Holographic Dark Energy in Non-flat Universe
• Cosmological perturbations in the $\Lambda$CDM-like limit of a polytropic dark matter model
• Thawing k-essence dark energy in the PAge space
• Dark energy in hybrid inflation
• Dark Energy and Dark Matter From Hidden Symmetry of Gravity Model with a Non-Riemannian Volume Form
• Cosmic inflation from broken conformal symmetry
• A new nonlinear instability for scalar fields
• Dynamics of k-essence in loop quantum cosmology
• Constraining Parameters of Generalized Cosmic Chaplygin Gas in Loop Quantum Cosmology
• Classical and quantum Big Brake cosmology for scalar field and tachyonic models
• Backreaction mechanism in multifluid and extended cosmologies
• Thermodynamical description of modified generalized Chaplygin gas model of dark energy
• A note on observational signatures in superluminal unified dark matter models
• Cosmology with higher-derivative matter fields
• Flatness without CMB - the Entanglement of Spatial Curvature and Dark Energy Equation of State
• Accelerating expansion of the universe may be caused by inhomogeneities
• Constraining the Lattice Fluid Dark Energy from SNe Ia, BAO and OHD
• Warm Modified Chaplygin Gas Shaft Inflation
• A cosmological model of the early universe based on ECG with variable $\Lambda$-term in Lyra geometry
• Quintessential Inflation, Unified Dark Energy and Dark Matter, and Higgs Mechanism
• The effect of curvature in thawing models
• A study of holographic dark energy models using configuration entropy
• Mass varying dark matter in effective GCG scenarios
• Two-body problem in theories with kinetic screening
• Tachyonization of the $\La$CDM cosmological model
• Euclid preparation. Simulations and nonlinearities beyond $\Lambda$CDM. 1. Numerical methods and validation
• Reconstruction of DBI-essence dark energy with f(R) gravity and its effect on black hole and wormhole mass accretion
• Quintessence and phantom emerging from the split-complex field and the split-quaternion field
• Mathematical properties of cosmological models with accelerated expansion
• Cosmological Dark sector from a Mimetic-Metric-Torsion perspective
• Effects of particle creation rate in two-fluid interacting cosmologies
• $\sigma$CDM coupled to radiation. Dark energy and Universe acceleration
• On the instability of some k-essence space-times
• Generalized phenomenological models of dark energy
• Generalized scalar field models with the same energy density and linear stability
• A Possible Late Time $\Lambda$CDM-like Background Cosmology in Relativistic MOND Theory
• Global asymptotic dynamics of the cubic galileon interacting with dark matter
• Observational constraints on G-corrected holographic dark energy using a Markov chain Monte Carlo method
• Instabilities Appearing in Cosmological Effective Field theories: When and How?
• Mimetic-Metric-Torsion with induced Axial mode and Phantom barrier crossing
• Dynamical System Analysis of a Three Fluid Cosmological Model : An Invariant Manifold approach
• Analytical Insights into Constant-Roll Condition: Extending the Paradigm to Non-Canonical Models
• The growth of DM and DE perturbations in DBI non-canonical scalar field scenario
• Phase-space analysis of torsion-coupled dilatonic ghost condensate
• Cosmological Dynamics in Interacting Scalar-Torsion f(T,$\varphi$) Gravity: Investigating Energy and Momentum Couplings
• Form Invariance of Raychaudhuri equation in the presence of Inflaton-type fields
• Multi-field TDiff theories for cosmology
• Dynamical System Analysis of Brane Induced Gravity with Tachyon Field
• New holographic Chaplygin gas model of dark energy
• Probing extra dimensions through cosmological observations of dark energy
• Non-linear spherical collapse in tachyon models, and a comparison of collapse in tachyon and quintessence models of dark energy
• Time-reparametrization invariance and Hamilton-Jacobi approach to the cosmological sigma-model
• Intensity mapping of post-reionization 21-cm signal and its cross-correlations as a probe of $f(R)$ gravity
• Entropic mechanisms with generalized scalar fields in the Ekpyrotic universe
• Time-Dependent Scalar Fields in Modified Gravities in a Stationary Spacetime
• Future soft singularities, Born-Infeld-like fields and particles
• Gravitational waves during inflation from a 5D large-scale repulsive gravity model
• Inhomogeneous and interacting vacuum energy
• Interacting Induced Dark Energy Model
• Cosmological consequences of a scalar field with oscillating equation of state. IV. Primordial nucleosynthesis and the deuterium problem
• $f(T)$ Gravity: Background Dependence and Propagating Degrees of Freedom
• A de Sitter limit analysis for dark energy and modified gravity models
• Correspondence between Electro-Magnetic Field and other Dark Energies in Non-linear Electrodynamics
• Space-time evolution induced by spinor fields with canonical and non-canonical kinetic terms
• Crossing the phantom divide with a classical Dirac field
• Evolution of Dark Energy Perturbations for Slotheon Field and Power Spectrum
• Accelerating behavior from dynamical system analysis parameters
• Impact of cosmological signatures in two-point statistics beyond the linear regime
• The Stringy Origins of Galileons and their Novel Limit
• Dynamical analysis and cosmological evolution in Weyl integrable gravity
• Dualities between Scale Invariant and Magnitude Invariant Perturbation Spectra in Inflationary/Bouncing Cosmos
• The coincidence problem in $f(R)$ gravity models
• Extensions of two-field mimetic gravity
• Poly-essential and general Hyperelastic World (brane) models
• Post-Newtonian Binary Dynamics in Effective Field Theory of Horndeski Gravity
• NEC violation in $f(\bar{R},\bar{T})$ gravity in the context of a non-canonical theory via modified Raychaudhuri equation
• Thermodynamics of Modified Chaplygin-Jacobi Gas and Modified Chaplygin-Abel Gas: Stability Analysis and Observational Constraints
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Generalized Ghost Pilgrim Dark Energy Fractal Cosmology with Observational Constraint
• A study on causality in $f(R,\varphi ,X)$ theory
• Accelerating Universe: Observational Status and Theoretical Implications
• Cosmological perturbations in the models of dark energy and modified gravity
• Generalizing the Swampland: Embedding $P(X,\phi )$ Inflationary Theories in a Curved Multi-field Space
• Oscillating solutions of the matter density contrast in Horndeski's theory
• Non Singular Origin of the Universe and the Cosmological Constant Problem (CCP)
• A new instability in clustering dark energy?
• Phase structure of the $O(2)$ ghost model with higher-order gradient term
• Why did the dark matter hypothesis supersede modified gravity in the 1980s?
• Perturbation in an interacting dark universe
• Recent Developments in Degenerate Higher Order Scalar Tensor Theories
• Fields in nonaffine bundles. III. Effective symmetries and conserved currents in strings and higher branes
• Reconstructions of Einstein-Aether Gravity from Barrow Agegraphic and New Barrow Agegraphic Dark Energy models: Examinations and Observational Limits
• Geometrical constraints on dark energy models
• Constraining the runaway dilaton and quintessential dark energy
• Intermediate inflation or late time acceleration?
• Thermodynamics of a Non-canonical $f(\bar{R},\bar{T})$ gravity
• Exploring the deviation of cosmological constant by a generalized pressure dark energy model
• Inflation is the generic feature of phantom field-not the big-rip
• Modified propagation of gravitational waves from the early radiation era
• Observational constraints on a Yang-Mills condensate dark energy model
• Enhanced power of gravitational waves and rapid coalescence of black hole binaries through dark energy accretion
• Analytic Study of Cosmological Perturbations in a Unified Model of Dark Matter and Dark Energy with a Sharp Transition
• On the equivalence between Sáez-Ballester theory and Einstein-scalar field system
• Hamilton-Jacobi formalism for k-inflation
• Constraints on dark energy evolution
• Theory of interacting vector dark energy and fluid
• Bouncing cosmological model with general relativistic hydrodynamics in extended gravity
• Dynamical System Analysis for Scalar Field Potential in Teleparallel Gravity
• Cosmological Unification, Dark Energy and the Origin of Neutrino Mass
• Cosmological Evolution of Viscous Dark Energy in f(Q,C) Gravity: Two-Fluid Approach
• Naturalness and stability of the generalized Chaplygin gas in the seesaw cosmon scenario
• Latest Cosmological Constraints on Cardassian expansion models including the updated Gamma-ray bursts
• $f(R)$ Gravity and Crossing the Phantom Divide Barrier
• Observational Study of Higher Dimensional Magnetic Universe in Non-linear Electrodynamics
• Effective field theory of coupled dark energy and dark matter
• On A Cosmological Invariant as an Observational Probe in the Early Universe
• Clusternets: A deep learning approach to probe clustering dark energy
• On the asymmetric non-canonical braneworld in five dimensions
• Cosmic expansion beyond $\Lambda$CDM: Investigating power-law and logarithmic corrections
• Compact scalar field solutions in EiBI gravity
• Time variation of the Equation of State for Dark Energy
• Screening fifth forces in scalar-vector-tensor theories
• Assessing the viability of successful reconstruction of the dynamics of dark energy using varying fundamental couplings
• Exploring the evolution of structure growth in the universe with field-fluid interactions through dynamical stability analysis
• A novel two-field pure K-essence for inflation, dark matter, dark energy and black holes
• Potentials of Coupled Quintessence Based on a Dilaton
• The Fourth Gravity Test and Quintessence Matter Field
• General Coordinate Transformations as the Origins of Dark Energy
• 'Constraint consistency' at all orders in Cosmological perturbation theory
• Search for dark energy potentials in quintessence theory
• Constraining Chaplygin models using diffuse supernova neutrino background
• Vacuum Energy and Renormalization of the Field-Independent Term
• Domain Wall and Holographic Dark Energy in $f(Q)$ Theory of Gravity
• Can we constrain the dark energy equation of state parameters using configuration entropy?
• Brane structure and metastable graviton in five-dimensional model with (non)canonical scalar field
• Dynamical System Analysis of Randall-Sundrum Model with Tachyon Field on the Brane
• Phenomenologically varying $\Lambda$ and a toy model for the Universe
• On the Field Theoretical Description of an Alternative Model to Generalized Chaplygin Gas and its Thermodynamic Behaviour
• Fields in nonaffine bundles. IV. Harmonious non-Abelian currents in string defects
• Hamiltonian formalism of cosmological perturbations and higher derivative theories
• Possible relationship between initial conditions for inflation and past geodesic incompleteness of the inflationary spacetime
• Shock waves as branes with throats
• Non-linear Eulerian Hydrodynamics of Dark Energy: Riemann problem and Finite Volume Schemes
• Neutrino Lorentz invariance violation from the CPT-even SME coefficients through a tensor interaction with cosmological scalar fields
• Top-Hat Spherical Collapse with Clustering Dark Energy. I. Radius Evolution and Critical Contrast Density
• Non-Affine Extensions of the Raychaudhuri Equation in the K-essence Framework
• Confronting Inflation Models with the Coming Observations on Primordial Gravitational Waves
• Thermodynamics and holography of tachyon cosmology
• Weak Gravity Conjecture and Holographic Dark Energy Model with Interaction and Spatial Curvature
• Dark energy without fine tuning
• The Dynamics of Inhomogeneous Dark Energy
• Constraining matter-bounce scenario from scalar-induced vector perturbations
• Primordial perturbations and inflation in a holography inspired Gauss-Bonnet cosmology
• The role of potential in the ghost-condensate dark energy model
• Cosmological LTB Black Hole in a Quintom Universe
• An effective description of dark energy: from theory to phenomenology
• From Dark Radiation to Dark Energy: Unified Cosmological Evolution in K-essence Models
• The Stability Analysis of Brane Induced Gravity with Quintessence Field on the Brane with a Gaussian Potential
• Exact solution and exotic fluid in cosmology
• Interacting Dark Energy and Its Implications for Unified Dark Sector
• Supersymmetric extensions of K field theories
• Nonsingular, lump-like, scalar compact objects in $(2+1)$-dimensional Einstein gravity
• Entropy Bounds and Holographic Dark Energy: Conflicts and Consensus
• Characterising Dark Energy through supernovae
• Skewness of matter distribution in clustering dark energy cosmologies
• Toy models of Universe with an Effective varying $\Lambda$-Term in Lyra Manifold
• K-nonizing
• Crossing Phantom Boundary in $f(R)$ Modified Gravity : Jordan Frame vs Einstein Frame
• How does Inflation Depend Upon the Nature of Fluids Filling Up the Universe in Brane World Scenario
• Particle Production Scenario in an Algebraically Coupled Quintessence Field with a Dark Matter Fluid
• Quintessence, Unified Dark Energy and Dark Matter, and Confinement/Deconfinement Mechanism
• Cosmological Complexity in K-essence
• Interacting dark fluid in the universe bounded by event horizon : A non-equilibrium prescription
• Realizing late-time cosmology in the context of Dynamical Stability Approach
• Ultra-light dark matter with non-canonical kinetics reopening the mass window
• Interaction between Tachyon and Hessence (or Hantom) dark energies
• Non-canonical 3-form dark energy
• Multifield theories invariant under transverse diffeomorphisms: The mixed regime case
• Generalized Three-Form Field
• Vortices in vacuumless systems
• Variable Modified Chaplygin Gas in Anisotropic Universe with Kaluza-Klein Metric
• Scalar field with the source in the form of the stress-energy tensor trace as a dark energy model
• Higher dimensional operators and their effects in (non)supersymmetric models
• Propagation Constraints and Classical Solutions in K-essence Like Theories
• Metric-Independent Volume-Forms in Gravity and Cosmology
• Holographic F(Q,T) Gravity with Lambert Solution
• K-essential covariant holography
• Observational constraints on generic models of non-minimal curvature-matter coupling
• Toward solving the cosmological constant problem by embedding
• Extremal cosmological black holes in Horndeski gravity and the anti-evaporation regime
• 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
• UV-complete and stable Quintom Dark Energy models in the light of DESI DR2
• Cosmological Dynamics of Exponential Quintessence Constrained by BAO, Cosmic Chronometers, and DES-SN5YR/Pantheon+ Data
• Complete factorization of equations of motion for generalized scalar field theories
• Position-Dependent Mass Quantum systems and ADM formalism
• Domain walls without a potential
• Stability Analysis of DGP Brane-world Model with Agegraphic Dark Energy
• Towards the unification of late-time acceleration and inflation by k-essence model
• A Bit Rate Bound on Superluminal Communication
• Neutron Stars in Causal Scalar-Tensor Theories
• $\Lambda$CDM from broken diffeomorphisms
• New dynamical features of pure k-essential cosmologies
• Dark energy with oscillatory tracking potential: Observational Constraints and Perturbative effects
• The Two-Measure Theory and an Overview of Some of its Manifestations
• Rényi Holographic Dark Energy Models In Multidimensional Universe
• Dark Energy Simulations
• K-essential Phantom Energy: Doomsday around the Corner? Revisited
• Agegraphic dark energy from entropy of the anti-de Sitter black hole
• The Cosmological Constant as a Function of Extrinsic Curvature and Spatial Curvature
• Can dark energy explain a high growth index?
• K-essence sources of Kerr-Schild spacetimes
• Kinetic coupled tachyon: A dynamical system analysis
• Electromagnetic Waves in Cosmological Space-Time II. Luminosity Distance
• Vortices in Maxwell-Higgs models with a global factor
• A dynamical dark energy model with a given luminosity distance
• Thermodynamics of irreversible particle creation phenomena and its cosmological consequence
• Wormhole Core, Extra Dimensions, and Physical Universe
• Living Near de Sitter Bubble Walls
• Scalar field dark energy with a minimal coupling in a spherically symmetric background
• Correlation of structure growth index with current cosmic acceleration: constraints on dark energy models
• Noether symmetry in $F(T)$ gravity with $f$-essence
• Modified scaling in $k$-essence model in interacting dark energy - dark matter scenario
• Dark Energy from Time Crystals
• Cosmology via Metric-Independent Volume-Form Dynamics
• Self-dual configurations in a generalized Abelian Chern-Simons-Higgs model with explicit breaking of the Lorentz covariance
• Chiral Dirac-Born-Infeld solitons with SDiff symmetry
• A new approach to modified-gravity models
• Cosmic evolution of scalar fields with multiple vacua: generalized DBI and quintessence
• Solar System and Atomic Clock Bounds on Locally Coupled Swampland Scalars
• The Possibility of Tachyons as Soliton Solutions in 3+1 Dimensions via k-field Models
• Masking a singularity with k-essence fields in an emergent gravity metric
• Using Dark Matter Haloes to Learn about Cosmic Acceleration: A New Proposal for a Universal Mass Function
• Hamilton-Jacobi analysis of noncanonical inflation in $f(R,T)$ gravity: Constraints from Planck/ACT data, and theoretical bounds
• $G_3$ -- interacting scalar tensor dark energy
• Can the scale factor be rippled?
• The four fixed points of scale invariant single field cosmological models
• The relation between Geometry and Matter in classical and quantum Gravity and Cosmology
• Anisotropic Evolution Driven by Kinetic Term
• Structure formation in a non-canonical scalar field model of clustering dark energy
• Probing single-field inflation: predictions, constraints, and theoretical viewpoints
• Influence On The Physical Universe By Wormhole Generated Extra Dimensional space
• First order framework for gauge k-vortices
• Holographic dark energy models with Interactions and entropy corrections for different cutoffs in the Brans-Dicke cosmology
• Cosmology in the presence of diffeomorphism-violating, nondynamical background fields
• Quintessence-Chameleon transitions in anisotropic Kiselev model of neutron stars
• Perturbations and stability conditions of k-essence and kinetic gravity braiding models in two-field measure theory
• Scalar Cherenkov radiation from high-energy cosmic rays
• Noncommutative geometry-inspired wormholes supported by quasi-de Sitter and Chaplygin-like equations of state
• Dynamical analysis of $k$-essence cosmology in the light of Supernova Ia observations
• Unified dynamical system formulations for $f(R,\varphi ,X)$ gravity with applications to nonminimal derivative coupling and $R^2$-Higgs inflation
• Evolution of matter perturbations in the context of cosmic slowing down
• Reconstructing square-law k-inflation from Planck data
• Stability of the accretion of a ghost condensate onto the Schwarzschild black hole
• Hamilton-Jacobi formalism for Generalized Chaplygin Gas models
• Scalar-scalar-tensor interaction in DHOST theories
• Observational Constraints and Cosmological Dynamics of Interacting Fractional Holographic Dark Energy in Light of DESI DR2
• Criticality and Big Brake singularities in the tachyonic evolutions of closed Friedmann universes with cold dark matter
• Geometric formulation of $k$-essence and late-time acceleration
• Probing dark energy using anisotropies in the clustering of post-EoR HI distribution
• Covariant single-field formulation of effective cosmological bounces
• Phantom Crossing with Quintom Models
• The Nature of Phantom Dark Energy and its Relation to Time Crystals
• Physical Implications and Updated Observational Constraints of the PAge-like Unified Dark Fluid Model
• Starobinsky model with f-essence
• A wormhole-generated physical universe with refined approximation