Large-scale curvature and entropy perturbations for multiple interacting fluids

Abstract

We present a gauge-invariant formalism to study the evolution of curvature perturbations in a Friedmann-Robertson-Walker universe filled by multiple interacting fluids. We resolve arbitrary perturbations into adiabatic and entropy components and derive their coupled evolution equations. We demonstrate that perturbations obeying a generalised adiabatic condition remain adiabatic in the large-scale limit, even when one includes energy transfer between fluids. As a specific application we study the recently proposed curvaton model, in which the curvaton decays into radiation. We use the coupled evolution equations to show how an initial isocurvature perturbation in the curvaton gives rise to an adiabatic curvature perturbation after the curvaton decays.

14 pages, latex with revtex, 5 figures; v2 typos corrected; v3 typos corrected, version to appear in Phys. Rev. D

References in corpus (3)

• The primordial density perturbation in the curvaton scenario
• Assisting pre-big bang phenomenology through short-lived axions
• Long-wavelength Cosmological Perturbation in the Universe with Multiple Perfect Fluids

Cited by in corpus (154)

• Non-Gaussianity from Inflation: Theory and Observations
• Inflation Dynamics and Reheating
• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Non-Gaussianity of the primordial perturbation in the curvaton model
• Large-scale instability in interacting dark energy and dark matter fluids
• Dynamics of dark energy with a coupling to dark matter
• Dynamics of interacting dark energy
• On Non-Gaussianity in the Curvaton Scenario
• A Hemispherical Power Asymmetry from Inflation
• Observational constraints on an interacting dark energy model
• Evolution of second-order cosmological perturbations
• Interacting Dark Energy -- constraints and degeneracies
• Non-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models
• Conserved cosmological perturbations
• Reheating Effects in the Matter Power Spectrum and Implications for Substructure
• Observational constraints on the curvaton model of inflation
• Growth of perturbations in dark matter coupled with quintessence
• Non-linear isocurvature perturbations and non-Gaussianities
• Primordial non-gaussianity up to all orders: theoretical aspects and implications for primordial black hole models
• Multiple field inflation
• Phase-space analysis of interacting phantom cosmology
• The Growth of Structure in Interacting Dark Energy Models
• Shear viscous effects on the primordial power spectrum from warm inflation
• A numerical study of non-gaussianity in the curvaton scenario
• The Curvaton as a Pseudo-Nambu-Goldstone Boson
• Mixed inflaton and curvaton perturbations
• Adiabatic and entropy perturbations with interacting fluids and fields
• Adiabatic initial conditions for perturbations in interacting dark energy models
• Models of inflation liberated by the curvaton hypothesis
• Curvaton Dynamics
• Curvaton Reheating in Non-oscillatory Inflationary Models
• Cosmological constraints on a decomposed Chaplygin gas
• Large-scale stable interacting dark energy model: Cosmological perturbations and observational constraints
• The CDM isocurvature perturbation in the curvaton scenario
• A Scale-Dependent Power Asymmetry from Isocurvature Perturbations
• Non-gaussianity and cosmic uncertainty in curvaton-type models
• Dark energy perturbations and cosmic coincidence
• Must Cosmological Perturbations Remain Non-Adiabatic After Multi-Field Inflation?
• Dark energy with dark spinors
• Non-Gaussian Fingerprints of Self-Interacting Curvaton
• Evolution of Second-Order Cosmological Perturbations and Non-Gaussianity
• Can the curvaton paradigm accommodate a low inflation scale?
• The Peccei-Quinn Field as Curvaton
• Dynamics of interacting quintessence
• Cosmological perturbations from varying masses and couplings
• Axion Cosmology with Early Matter Domination
• Gauge-invariant perturbations at second order: multiple scalar fields on large scales
• Large Non-Gaussianity Implication for Curvaton Scenario
• Correlated isocurvature perturbations from mixed inflaton-curvaton decay
• Quintessence with quadratic coupling to dark matter
• Curvature Perturbations from Broken Symmetries
• Post-$Planck$ constraints on interacting vacuum energy
• Perturbations in cosmologies with a scalar field and a perfect fluid
• Curvatons in Supersymmetric Models
• WMAP, neutrino degeneracy and non-Gaussianity constraints on isocurvature perturbations in the curvaton model of inflation
• Large-scale (in-) stability Analysis of an Exactly Solved Coupled Dark-Energy Model
• Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
• Curvature and isocurvature perturbations in a three-fluid model of curvaton decay
• MultiModeCode: An efficient numerical solver for multifield inflation
• Evolution of primordial perturbations and a fluctuating decay rate
• Multiple-field inflation and the CMB
• MSSM Higgses as the source of reheating and all matter
• Can Non-Adiabatic Perturbations Arise After Single-Field Inflation?
• Dynamics of coupled phantom and tachyon fields
• Preheating with Non-Standard Kinetic Term
• Metric perturbation from inflationary magnetic field and generic bound on inflation models
• Large-scale curvature perturbations with spatial and time variations of the inflaton decay rate
• Preheating curvature perturbations with a coupled curvaton
• Cosmological perturbations for an inflaton field coupled to radiation
• Origin of Delta N_eff as a Result of an Interaction between Dark Radiation and Dark Matter
• Background evolution and growth of structures in interacting dark energy through dynamical system analysis
• Nonlinear perturbations for dissipative and interacting relativistic fluids
• Can cosmological perturbations produce early universe vorticity?
• Growth of curvature perturbations for PBH formation \& detectable GWs in non-minimal curvaton scenario revisited
• Mass varying neutrinos, symmetry breaking, and cosmic acceleration
• Non-Gaussianity and Gravitational Waves from Quadratic and Self-interacting Curvaton
• Dynamical analysis of interacting dark energy model in the framework of particle creation mechanism
• Dark Energy Interacting with Dark Matter in Classical Einstein and Loop Quantum Cosmology
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Staggered Multi-Field Inflation
• Cosmological density perturbations from perturbed couplings
• Perturbations in a scalar field model with virtues of $\Lambda$CDM
• Constraints on a decomposed dark fluid with constant adiabatic sound speed by jointing the geometry test and growth rate after Planck data
• Neutralino Dark Matter and the Curvaton
• Flat limits of curved interacting cosmic fluids
• Sneutrino condensate as a candidate for the hot big bang cosmology
• Constraints on neutrino density and velocity isocurvature modes from WMAP-9 data
• Evolution of the curvature perturbation during and after multi-field inflation
• On the Amount of Gravitational Waves from Inflation
• Cosmological perturbations for imperfect fluids
• Inflation without Inflaton(s)
• Multiple scalar particle decay and perturbation generation
• Designing and testing inflationary models with Bayesian networks
• Interacting viscous mixtures
• Differentiating dark interactions with perturbation
• Curvaton Scenario with Affleck-Dine Baryogenesis
• Gauge-invariant perturbation theory for trans-Planckian inflation
• Testing distance duality with CMB anisotropies
• Suppressing Super-Horizon Curvature Perturbations?
• Opening the reheating box in multifield inflation
• New scenario of QCD axion clump formation I: Linear analysis
• Singularities in cosmologies with interacting fluids
• Curvaton reheating mechanism in inflation on warped Dvali-Gabadadze-Porrati brane
• Temporal enhancement of super-horizon curvature perturbations from decays of two curvatons and its cosmological consequences
• Instability in interacting dark sector: An appropriate Holographic Ricci dark energy model
• Reheating in tachyonic inflationary models: Effects on the large scale curvature perturbations
• Perturbation spectra in the warm $k$-inflation
• Dynamical behavior of interacting dark energy in loop quantum cosmology
• Effects of non-linearities on magnetic field generation
• $H(z)$ diagnostics on the nature of dark energy
• Cosmological constraints on the curvaton web parameters
• Dark energy homogeneity in general relativity: Are we applying it correctly?
• Reexamination of the warm inflation curvature perturbations spectrum
• Intrinsic Entropy Perturbations from the Dark Sector
• Large Density Perturbations from Reheating to Standard Model particles due to the Dynamics of the Higgs Boson during Inflation
• Induced gravitational waves and baryon asymmetry fluctuations from primordial black hole formation
• Coupling structure of multi-field primordial perturbations
• Revealing the non-adiabatic nature of dark energy perturbations from galaxy clustering data
• Freeze-in Dark Matter Perturbations are Adiabatic
• Hemispherical Power Asymmetry of the Cosmic Microwave Background from a Remnant of a pre-Inflationary Topological Defect
• Fully non-linear equivalence of delta N and covariant formalisms
• Non-adiabatic perturbations in multi-component perfect fluids
• The Origin of the Large-Scale Structure in the Universe: Theoretical and Statistical Aspects
• Generating cosmological perturbations with mass variations
• Degeneracy between nonadiabatic dark energy models and $\Lambda$CDM: ISW effect and the cross correlation of CMB with galaxy clustering data
• Sensitivity of quintessence perturbations to initial conditions
• Cosmological Perturbations: Vorticity, Isocurvature and Magnetic Fields
• Thermal Effects and Sudden Decay Approximation in the Curvaton Scenario
• Consistent energy-momentum trace couplings of fluids
• Isocurvature initial conditions for second order Boltzmann solvers
• Cosmological Perturbations During Radion Stabilization
• Evolution of Large Scale Curvature Fluctuations During the Perturbative Decay of the Inflaton
• Adiabatic and non-adiabatic perturbations for loop quantum cosmology
• Testing Two-Field Inflation
• The Effect of Curvaton Decay on the Primordial Power Spectrum
• Long wavelength limit of evolution of cosmological perturbations in the universe where scalar fields and fluids coexist
• Perturbation in an interacting dark universe
• Inflation from a chaotic potential with a step
• How large are curvature perturbations from slow first-order phase transitions? A gauge-invariant analysis
• Suppression of the large scale curvature perturbation by interacting fluids
• Has inflation really solved the problems of flatness and absence of relics?
• Constraints on the three-fluid model of curvaton decay
• QCD Axions and CMB Anisotropy
• Scale invariant curvature perturbations from a spontaneously decaying scalar field
• Generic autonomous system approach to interacting dark energy models
• Are dark matter and dark energy omnipresent?
• Curvaton mechanism and its implications to sneutrino cosmology
• Non-linear effects in early Universe cosmology
• The intrinsic bispectrum of the CMB from isocurvature initial conditions
• Adiabatic fluctuations from cosmic strings in a contracting universe
• Dark energy with oscillatory tracking potential: Observational Constraints and Perturbative effects
• Non-Adiabatic Perturbations from Single-Field Inflation
• Perturbations In Some Dark Energy Models