k-Essence, superluminal propagation, causality and emergent geometry

Abstract

The k-essence theories admit in general the superluminal propagation of the perturbations on classical backgrounds. We show that in spite of the superluminal propagation the causal paradoxes do not arise in these theories and in this respect they are not less safe than General Relativity.

34 pages, 5 figures

References in corpus (36)

• Causality, Analyticity and an IR Obstruction to UV Completion
• Can dark energy evolve to the Phantom?
• Starting the Universe: Stable Violation of the Null Energy Condition and Non-standard Cosmologies
• Avoiding Dark Energy with 1/R Modifications of Gravity
• New Ekpyrotic Cosmology
• Cuscuton: A Causal Field Theory with an Infinite Speed of Sound
• A smooth bouncing cosmology with scale invariant spectrum
• Field-theoretical formulations of MOND-like gravity
• Global topological k-defects
• Generalized Global Defect Solutions
• Ghosts, Instabilities, and Superluminal Propagation in Modified Gravity Models
• On causality and superluminal behavior in classical field theories. Applications to k-essence theories and MOND-like theories of gravity
• Cuscuton Cosmology: Dark Energy meets Modified Gravity
• Crossing the Phantom Divide
• Ghost conditions for Gauss-Bonnet cosmologies
• No-go theorem for k-essence dark energy
• Causality and the speed of sound
• Superluminality and UV Completion
• The Refractive Index of Curved Spacetime: the Fate of Causality in QED
• Escaping from the black hole?
• Formation of closed timelike curves in a composite vacuum/dust asymptotically-flat spacetime
• On the Initial Conditions in New Ekpyrotic Cosmology
• Causality and Micro-Causality in Curved Spacetime
• Phantom Matter and the Cosmological Constant
• Attractor scenarios and superluminal signals in k-essence cosmology
• On the Null Energy Condition and Cosmology
• Bigravity and Lorentz-violating Massive Gravity
• Causality Constrains Higher Curvature Corrections to Gravity
• Gravitating Global k-monopole
• Self-reproduction in k-inflation
• Closed timelike geodesics in a gas of cosmic strings
• Looking beyond the horizon
• Superluminal motion and closed signal curves
• Inflation with large gravitational waves
• Constant H field, cosmology and faster than light solitons
• Causality and Superluminal Fields

Cited by in corpus (354)

• Modified Gravity and Cosmology
• Beyond the Cosmological Standard Model
• Massive Gravity
• Theoretical Aspects of Massive Gravity
• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Quintom Cosmology: Theoretical implications and observations
• Dark Energy
• Imperfect Dark Energy from Kinetic Gravity Braiding
• The relativistic pulsar-white dwarf binary PSR J1738+0333 II. The most stringent test of scalar-tensor gravity
• The Physics of Cosmic Acceleration
• Maximal freedom at minimum cost: linear large-scale structure in general modifications of gravity
• A systematic approach to generalisations of General Relativity and their cosmological implications
• Galilean Genesis: an alternative to inflation
• On the Extra Mode and Inconsistency of Horava Gravity
• Dark Energy and Dark Gravity
• G-Bounce
• The Effective Theory of Quintessence: the w<-1 Side Unveiled
• Theoretical Models of Dark Energy
• Cosmology with Mimetic Matter
• Dust of Dark Energy
• Speed of Gravitational Waves and the Fate of Scalar-Tensor Gravity
• Dark Energy in light of Multi-Messenger Gravitational-Wave astronomy
• Model independent constraints on dark energy evolution from low-redshift observations
• Galileon gravity and its relevance to late time cosmic acceleration
• Inflation and primordial non-Gaussianities of "generalized Galileons"
• A cosmic vector for dark energy
• The observational status of Galileon gravity after Planck
• Vector theories in cosmology
• Relativistic stars in f(R) and scalar-tensor theories
• Aetherizing Lambda: Barotropic Fluids as Dark Energy
• Improving relativistic MOND with Galileon k-mouflage
• Linear perturbations in Galileon gravity models
• Cosmic expansion and growth histories in Galileon scalar-tensor models of dark energy
• Gauge-invariant analysis of perturbations in Chaplygin gas unified models of dark matter and dark energy
• Solid Holography and Massive Gravity
• First-order framework and generalized global defect solutions
• Selected topics in scalar-tensor theories and beyond
• The Paths of Gravity in Galileon Cosmology
• A non-local theory of massive gravity
• Instabilities in Metric-Affine Theories of Gravity
• An Alternative to Particle Dark Matter
• Chronology Protection in Galileon Models and Massive Gravity
• The phenomenological approach to modeling the dark energy
• Thermal history of the plasma and high-frequency gravitons
• Stability of a black hole and the speed of gravity waves within self-tuning cosmological models
• Constraining Disformally Coupled Scalar Fields
• Stability and superluminality of spherical DBI galileon solutions
• Black holes in the presence of dark energy
• The parameter space in Galileon gravity models
• Stability of Horndeski vector-tensor interactions
• Imperfect Dark Matter
• Time-dependent spherically symmetric covariant Galileons
• Vacuum structure for scalar cosmological perturbations in Modified Gravity Models
• Can we make sense of dissipation without causality?
• Massive Gravity Acausality Redux
• Restoring General Relativity in massive bi-gravity theory
• DHOST Bounce
• The Causal Structure of QED in Curved Spacetime: Analyticity and the Refractive Index
• Bimetric varying speed of light theories and primordial fluctuations
• Speedy sound and cosmic structure
• Pure kinetic k-essence as the cosmic speed-up
• Dynamical Emergence of Universal Horizons during the formation of Black Holes
• Hamiltonian vs stability and application to Horndeski theory
• How the Scalar Field of Unified Dark Matter Models Can Cluster
• When Matter Matters
• Kinetic k-essence ghost dark energy model
• Introducing the Slotheon: a slow Galileon scalar field in curved space-time
• Slow-roll Inflation with the Gauss-Bonnet and Chern-Simons Corrections
• Perfect fluid and scalar field in the Reissner-Nordstrom metric
• Potential-driven Galileon inflation
• Stochastic backgrounds of relic gravitons: a theoretical appraisal
• Consistent perturbations in an imperfect fluid
• Deconstructing Dimensions and Massive Gravity
• Phenomenology of theories of gravity without Lorentz invariance: the preferred frame case
• Fab Four: When John and George play gravitation and cosmology
• Non-Existence of Black Holes with Non-Canonical Scalar Fields
• Cosmological tachyon condensation
• Generalized self-dual Chern-Simons vortices
• Massive Spin-2 Scattering and Asymptotic Superluminality
• Compact gauge K vortices
• Compact self-gravitating solutions of quartic (K) fields in brane cosmology
• Chaotic inflation in modified gravitational theories
• N=1 supersymmetric extension of the baby Skyrme model
• D-BIonic Screening of Scalar Fields
• Inflationary observables in loop quantum cosmology
• General Single Field Inflation with Large Positive Non-Gaussianity
• On the possibility of blue tensor spectrum within single field inflation
• Attractive Lagrangians for Noncanonical Inflation
• Massive and Massless Spin-2 Scattering and Asymptotic Superluminality
• Primordial black holes and gravitational waves from non-canonical inflation
• One-loop corrections to the photon propagator in the curved-space QED
• $k$-essence $f(R)$ Gravity Inflation
• Unified Model of k-Inflation, Dark Matter & Dark Energy
• Extended Supersymmetry and BPS solutions in baby Skyrme models
• Superluminality, Black Holes and Effective Field Theory
• Tachyacoustic Cosmology: An Alternative to Inflation
• Kinetic screening in nonlinear stellar oscillations and gravitational collapse
• Gravitational Wave Oscillations in Bigravity
• Information-Entropic for Travelling Solitons in Lorentz and CPT Breaking Systems
• On the local structure of spacetime in ghost-free bimetric theory and massive gravity
• Scalar Gravitational Radiation from Binaries: Vainshtein Mechanism in Time-dependent Systems
• Axionic black branes in the k-essence sector of the Horndeski model
• Constraints on Kinetically Modified Inflation from WMAP5
• Space-time slicing in Horndeski theories and its implications for non-singular bouncing solutions
• Viability of vector-tensor theories of gravity
• Galileon accretion
• Cosmology in beyond-generalized Proca theories
• Can cosmological observations uniquely determine the nature of dark energy ?
• Unification of Galileon Dualities
• Compact vortex in a generalized Born-Infeld model
• On the stability and causality of scalar-vector theories
• Cuscuton gravity as a classically stable limiting curvature theory
• Emergent Universe and Genesis from the DHOST Cosmology
• Caustic free completion of pressureless perfect fluid and k-essence
• Can a primordial black hole or wormhole grow as fast as the universe?
• Non-Gaussianity in single field models without slow-roll
• Stationary Configurations Imply Shift Symmetry: No Bondi Accretion for Quintessence / k-Essence
• The extreme limit of the generalized Chaplygin gas
• Unified Dark Matter scalar field models with fast transition
• Dynamics of Screening in Modified Gravity
• Primordial Perturbations in Einstein-Aether and BPSH Theories
• Formation of caustics in k-essence and Horndeski theory
• Caustics for Spherical Waves
• Shining Light on Modifications of Gravity
• Phase-space analysis of a class of k-essence cosmology
• Constant-roll in the Palatini-$R^2$ models
• Recovering P(X) from a canonical complex field
• Quantum field theory based on birefringent modified Maxwell theory
• Extended Effective Field Theory of Inflation
• Unification of Dark Matter - Dark Energy in Generalized Galileon Theories
• Cosmological perturbations in SFT inspired non-local scalar field models
• Bimetric structure formation: non-Gaussian predictions
• Fast and accurate predictions of the nonlinear matter power spectrum for general models of Dark Energy and Modified Gravity
• Thermodynamics of k-essence
• From configuration to dynamics -- Emergence of Lorentz signature in classical field theory
• Graviton Corrections to Maxwell's Equations
• An algebraic construction of twin-like models
• Gravitational Collapse in Cubic Horndeski Theories
• Cosmological constraints on general, single field inflation
• Non-canonical generalizations of slow-roll inflation models
• Galileon forces in the Solar System
• Generalized BPS magnetic monopoles
• Gordon and Kerr-Schild ansatze in massive and bimetric gravity
• Multiple kinetic k-essence, phantom barrier crossing and stability
• Note on the thermodynamics and the speed of sound of a scalar field
• Closed Timelike Curves in the Galileon Model
• Gravitational collapse of k-essence
• Supersymmetric K field theories and defect structures
• Constant-roll $k$-Inflation Dynamics
• The nonlinear dynamical stability of infrared modifications of gravity
• Initial Conditions for Non-Canonical Inflation
• A cautionary case of casual causality
• An equation of state for purely kinetic k-essence inspired by cosmic topological defects
• Testing gravity with $E_G$: mapping theory onto observations
• The Hawking temperature in the context of dark energy
• General conditions for scale-invariant perturbations in an expanding universe
• Generalized self-dual Maxwell-Chern-Simons-Higgs model
• Analysis of scalar perturbations in cosmological models with a non-local scalar field
• Aether Unleashed
• Twinlike models with identical linear fluctuation spectra
• Spontaneous Breaking of Lorentz Symmetry with an antisymmetric tensor
• K-dynamics: well-posed 1+1 evolutions in K-essence
• Linear Stability Analysis and the Speed of Gravitational Waves in Dynamical Chern-Simons Modified Gravity
• Suppressing Quantum Fluctuations in Classicalization
• Halos of Unified Dark Matter Scalar Field
• Stability of the aether
• Null Energy Condition Violation and Classical Stability in the Bianchi I Metric
• Comparison of different approaches to the quasi-static approximation in Horndeski models
• Cosmological Evolution of a Tachyon-Quintom Model of Dark Energy
• K-mouflage gravity models that pass Solar System and cosmological constraints
• On the phantom barrier crossing and the bounds on the speed of sound in non-minimal derivative coupling theories
• Kinetically coupled dark energy
• Lensing anomaly and oscillations in the primordial power spectrum
• Measuring Unified Dark Matter with 3D Cosmic Shear
• k-stabilization in brane models
• Cosmological black holes from self-gravitating fields
• Higher-Curvature Corrections and Tensor Modes
• Extended disformal approach in the scenario of Rainbow Gravity
• Price for Environmental Neutrino-Superluminality
• Unified dark sectors in scalar-torsion theories of gravity
• Alleviating $H_0$ tension in Horndeski gravity
• Scalar Fields Near Compact Objects: Resummation versus UV Completion
• Scalar mode propagation in modified gravity with a scalar field
• More on the fact that Rastall = GR
• Phenomenological models for Unified Dark Matter with fast transition
• Consistency relation in power law G-inflation
• Initial value problem in string-inspired nonlocal field theory
• Evidence for the Fifth Element Astrophysical status of Dark Energy
• Self-accelerating Massive Gravity: Superluminality, Cauchy Surfaces and Strong Coupling
• Gravitational Collapse for the K-essence Emergent Vaidya Spacetime
• New class of generalized coupling theories
• Topological vortices in generalized Born-Infeld-Higgs electrodynamics
• Subluminal cosmological bounce beyond Horndeski
• Symmetric Scalars
• Inflation with $0\le c_{\mathrm{s}}\le 1$
• G-Curvaton
• Anisotropic $k$-essence
• Could the black hole singularity be a field singularity?
• Causality Violations in Lovelock Theories
• Stability of Closed Timelike Curves in a Galileon Model
• Spectrum of Cuscuton Bounce
• Vainshtein mechanism in Gauss-Bonnet gravity and Galileon aether
• Survey of analogue spacetimes
• On Swift Gravitons
• Compact boson stars in K field theories
• Raychaudhuri equation in $k$-essence geometry: conditional singular and non-singular cosmological models
• Inflation with Massive Vector Fields
• The Hawking Temperature in the context of Dark Energy for Reissner-Nordstrom and Kerr background
• Gravitational collapse of K-essence Matter in Painlevé-Gullstrand coordinates
• Preheating with the Brakes On: The Effects of a Speed Limit
• K-essence Emergent Spacetime as Generalized Vaidya Geometry
• The Phase Space of $k$-Essence $f(R)$ Gravity Theory
• Gravitational Production of Completely Dark Photons with Nonminimal Couplings to Gravity
• The Hawking temperature in the context of dark energy for Kerr-Newman and Kerr-Newman-AdS backgrounds
• Stability Conditions in the Generalized SU(2) Proca Theory
• FRW universe in the laboratory
• The effective field theory of K-mouflage
• Exact Solutions for Nonlocal Nonlinear Field Equations in Cosmology
• The Degeneracy Problem in Non-Canonical Inflation
• Mimetic Inflation
• A field theory in Randers-Finsler spacetime
• Evaporation of dynamical horizon with the Hawking temparature in the {\bf K-}essence emergent Vaidya spacetime
• On Bouncing and Nonsingular Solutions in Einstein-scalar-Gauss-Bonnet Cosmology
• Chronology Protection Implementation in Analogue Gravity
• Superluminality in DHOST theory with extra scalar
• Dynamics of generalized tachyon field
• BPS bounds in supersymmetric extensions of K field theories
• Gravitational Wave from Axion-SU(2) Gauge Fields: Effective Field Theory for Kinetically Driven Inflation
• Investigating clustering dark energy with 3d weak cosmic shear
• Some exact BPS solutions for exotic vortices and monopoles
• $k$-Inflation-corrected Einstein-Gauss-Bonnet Gravity with Massless Primordial Gravitons
• Nearly scale-invariant curvature modes from entropy perturbations during graceful exit
• Plane waves in the generalized Galileon theory
• Thermodynamics for the k-essence Emergent Reissner-Nordstrom-de Sitter Spacetime
• The Music of the Aetherwave - B-mode Polarization in Einstein-Aether Theory
• Collapsing scenario for the k-essence emergent generalised Vaidya spacetime in the context of massive gravity's rainbow
• Causal structure of black holes in shift-symmetric Horndeski theories
• Cosmic Censorship in Lorentz Violating Theories of Gravity
• Constraining dark sector perturbations II: ISW and CMB lensing tomography
• Inflation and late-time accelerated expansion driven by $k$-essence degenerate dynamics
• Superluminality in beyond Horndeski theory with extra scalar field
• Effective metric in nonlinear scalar field theories
• Neutrino generated dynamical dark energy with no dark energy field
• A generalized Weyl structure with arbitrary non-metricity
• Charged Nielsen-Olesen vortices from a Generalized Abelian Chern-Simons-Higgs Theory
• Exact Solutions of the Equations of Relativistic Hydrodynamics Representing Potential Flows
• Analytical BPS Maxwell-Higgs vortices
• The Phantom of the New Oscillatory Cosmological Phase
• $f(\bar{R},L(X))$-gravity in the context of dark energy with power law expansion and energy conditions
• Cosmology in 5D and 4D Einstein-Gauss-Bonnet gravity
• Implications of JLA data for $k-$essence model of dark energy with given equation of state
• Dark matter superfluid and DBI dark energy
• CMB anisotropies from acausal scaling seeds
• Viability of nonminimally coupled f (R) gravity
• Cosmological effects of the Galileon term in Scalar-Tensor Theories
• Varying-Alpha and K-Essence
• FRW Cosmology with Non-positively Defined Higgs Potentials
• Reconstructing Single Field Inflationary Actions From CMBR Data
• Restrictions on purely kinetic k-essence
• Self-dual soliton solutions in a Chern-Simons-CP(1) model with a nonstandard kinetic term
• Thermal Tachyacoustic Cosmology
• Solitons in generalized galileon theories
• Holographik, the k-essential approach to interactive models with modified holographic Ricci dark energy
• Self-Dual Soliton Solution in a Generalized Jackiw-Pi Model
• Acausality in Superfluid Dark Matter and MOND-like Theories
• Geodesic structure of generalized Vaidya spacetime through the K-essence
• Covariance of dark energy parameters and sound speed constraints from large HI surveys
• Stochastic tunneling for strongly non-Gaussian inflationary theories
• Chaotic Inflation and Reheating in Generalized Scalar-Tensor Gravity
• Superluminal Travel Made Possible (in two dimensions)
• Non-Stationary Dark Energy Around a Black Hole
• Collapsing scenarios of K-essence generalized Vaidya spacetime under $f(\bar{R},\bar{T})$ gravity
• Three problems of superfluid dark matter and their solution
• Cosmological effects on $f(\bar{R},\bar{T})$ gravity through a non-standard theory
• Supersymmetric galileons and auxiliary fields in 2+1 dimensions
• Gravitational Cherenkov losses in MOND theories
• A Note on Spontaneously Broken Lorentz Invariance
• Double screening
• Scalar emission from neutron star-black hole binaries in scalar-tensor theories with kinetic screening
• Consistency of Tachyacoustic Cosmology with de Sitter Swampland Conjectures
• The Price of Neutrino Superluminality continues to rise
• A Viable Dark Fluid Model
• Relativistic effects in the large-scale structure with effective dark energy fluids
• Emergence of ghosts in Horndeski theory
• Multi-field Cuscuton Cosmology
• Causality and Stability from Acoustic Geometry
• The evolution of the power law k-essence cosmology
• Galactic Halos and Black Holes in Non-Canonical Scalar Field Theories
• Scalar Dark Energy Models and Scalar-Tensor Gravity: Theoretical Explanations for the Accelerated Expansion of Present Universe
• A note on observational signatures in superluminal unified dark matter models
• Instabilities Appearing in Cosmological Effective Field theories: When and How?
• Caustic Formation upon Shift Symmetry Breaking
• Two-body problem in theories with kinetic screening
• Potential-driven Inflation with Disformal Coupling to Gravity
• Form Invariance of Raychaudhuri equation in the presence of Inflaton-type fields
• The growth of DM and DE perturbations in DBI non-canonical scalar field scenario
• Analogue spacetimes: Toy models for "quantum gravity''
• Null geodesic structure for the Barriola-Vilenkin spacetime via $k$-essence
• Healthy Horndeski cosmologies with torsion
• NEC violation in $f(\bar{R},\bar{T})$ gravity in the context of a non-canonical theory via modified Raychaudhuri equation
• Classicalization as a tunnelling phenomenon
• Interaction of Neutrinos with a Cosmological K-essence Scalar
• A Critique of Covariant Emergent Gravity
• The scalar-torsion gravity corrections in the first-order inflationary models
• Thermodynamics of a Non-canonical $f(\bar{R},\bar{T})$ gravity
• Non-Gaussian signatures of Tachyacoustic Cosmology
• Escape from a black hole with spherical warp drive
• Quantum superpositions of the speed of light
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• On the equivalence between Sáez-Ballester theory and Einstein-scalar field system
• The Trans-Planckian problem in Tachyacoustic Cosmology
• Predictability of subluminal and superluminal wave equations
• Motion of Rotating Black Holes in Homogeneous Scalar Fields: A General Case
• Beyond Buchdahl's limit: bilayered stars and thin-shell configurations
• General-relativistic spin system
• Analog dual to a 2+1-dimensional holographic superconductor
• Inflation in theories with broken diffeomorphisms
• K-nonizing
• IR side of bounds on Theories with Spontaneously Broken Lorentz Symmetry
• Time-Dependent Warping and Non-Singular Bouncing Cosmologies
• Slow Burgers Vortices in Hot Conformal Fluids
• Supersymmetric extensions of K field theories
• The K-essence flow seen from the preferred frame $S_V$. A scalar field theory with Landau superfluid structure
• Galilean symmetry in generalized abelian Schrödinger-Higgs models with and without gauge field interaction
• Quantum Corrections in Classicalon Theories
• Primordial perturbations and inflation in a holography inspired Gauss-Bonnet cosmology
• Universal Horizons without Hypersurface Orthogonality
• A Bit Rate Bound on Superluminal Communication
• Dark energy constraints in light of theoretical priors
• Tachyonic fields in cosmology
• Self-dual configurations in a generalized Abelian Chern-Simons-Higgs model with explicit breaking of the Lorentz covariance
• Kinetic coupled tachyon: A dynamical system analysis
• Acausality-driven instabilities in transient relativistic viscous hydrodynamics
• Constant Roll Inflationary Dynamics with Generalized Potentials in $f(R,\varphi ,X)$ Gravity
• Bimetric Models of Gravity and Cosmology in the Early Universe
• Domain walls without a potential
• Dynamical suppression of non-adiabatic modes
• Relativistic Dispersion Spectra across Lorentz boosted frames: Spurious modes and the enigma of causality
• Hamiltonian vs stability in alternative theories of gravity
• Cherenkov radiation as ghost instability
• The four fixed points of scale invariant single field cosmological models
• Note on generalization of Jackiw-Pi Vortices
• Non-parametric exploration of minimally coupled gravity with phantom crossing
• Planar Black holes and Entanglement Entropy in Analog Gravity Models
• Geometric formulation of $k$-essence and late-time acceleration
• K-Essence Induced by Derivative Couplings of the Inflaton
• Kinetically-driven ekpyrosis
• A Tachyon Field around the Black Hole
• Ghost condensation and Ostrogradskian instability on low derivative backgrounds
• Classical limit for Dirac fermions with modified action in the presence of the black hole
• Stability of the accretion of a ghost condensate onto the Schwarzschild black hole
• Non-singular Bouncing Cosmology in $f(R,G,T)$--Quintom model
• Kinetically stabilized inflation