On the generation of density perturbations at the end of inflation
arXiv:astro-ph/0511146 · doi:10.1103/PhysRevD.72.123516
Abstract
Recently a mechanism was proposed whereby the primordial density perturbations are generated at the end of inflation. We continue the analysis of the proposed model of this mechanism and calculate the maximum extent to which the density perturbations produced via this model can dominate over those of the standard inflationary paradigm. In addition, we provide a straightforward variation of this model which allows for greater amplification of the density perturbations. Finally, we show that a variation in the implementation of the original model results in significant non-gaussianities in the resulting spectrum of density perturbations. The level of non-gaussianities can be made to saturate the current observational bound.
arXiv comment7 pages, no figures. v2: significant revisions to section IV, other comments clarified, references added. v3: typo corrected, version that appears in PRD. v4: some misstatements in the background section corrected, no change in results. v5: erratum added to correct the predictions of section V.B, reference added
References in corpus (26)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
- Non-Gaussian features of primordial fluctuations in single field inflationary models
- Particle Physics Models of Inflation and the Cosmological Density Perturbation
- Generating the curvature perturbation without an inflaton
- Hybrid Inflation
- 4-Year COBE DMR Cosmic Microwave Background Observations: Maps and Basic Results
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
- Acoustic Signatures in the Primary Microwave Background Bispectrum
- A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
- Adiabatic CMB perturbations in pre-big bang string cosmology
- Effects of Cosmological Moduli Fields on Cosmic Microwave Background
- Equilibrium State of a Massless Self-Interacting Scalar Field in the De Sitter Background
- A general proof of the conservation of the curvature perturbation
- Nongaussian Isocurvature Perturbations from Inflation
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Tests of Gaussianity
- The inflationary prediction for primordial non-gaussianity
- A new mechanism for generating density perturbations from inflation
- Cosmological Perturbations From Inhomogeneous Reheating, Freeze-Out, and Mass Domination
- The Curvaton as a Pseudo-Nambu-Goldstone Boson
- Modulated fluctuations from hybrid inflation
- A New delta N Formalism for Multi-Component Inflation
- Topological Curvatons
- Scenarios of modulated perturbations
- Fluctuating annihilation cross sections and the generation of density perturbations
- Light Scalars and the Generation of Density Perturbations During Preheating or Inflaton Decay
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- Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
- Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
- Non-Gaussianities in two-field inflation
- Review of local non-Gaussianity from multi-field inflation
- Planck 2018 results. IX. Constraints on primordial non-Gaussianity
- Primordial statistical anisotropy generated at the end of inflation
- Conditions for large non-Gaussianity in two-field slow-roll inflation
- Local non-Gaussianity from inflation
- CMB Anisotropies at Second Order I
- Primordial non-Gaussianities in general modified gravitational models of inflation
- CMB Anisotropies at Second-Order II: Analytical Approach
- Non-Gaussianity beyond slow roll in multi-field inflation
- Non-Gaussianity and statistical anisotropy from vector field populated inflationary models
- Large non-Gaussianity from two-component hybrid inflation
- Nongaussianity from Tachyonic Preheating in Hybrid Inflation
- The cosmic microwave background temperature bispectrum from scalar perturbations induced by primordial magnetic fields
- On the full trispectrum in single field DBI-inflation
- On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part I: the Bispectrum
- Large Nongaussianity from Nonlocal Inflation
- On Classification of Models of Large Local-Type Non-Gaussianity
- Non-gaussianity and cosmic uncertainty in curvaton-type models
- Very Large Primordial Non-Gaussianity from multi-field: Application to Massless Preheating
- Non-Gaussianity and the Cosmic Microwave Background Anisotropies
- Non-Gaussianity of quantum fields during inflation
- The hybrid inflation waterfall and the primordial curvature perturbation
- Curvature perturbation from symmetry breaking the end of inflation
- Generating the Curvature Perturbation at the End of Inflation in String Theory
- On the full quantum trispectrum in multi-field DBI inflation
- Lorentz boost and non-Gaussianity in multi-field DBI-inflation
- Predictions for Nongaussianity from Nonlocal Inflation
- Combined local and equilateral non-Gaussianities from multifield DBI inflation
- Non-gaussianity for a Two Component Hybrid Model of Inflation
- Strongly Scale-dependent Non-Gaussianity
- Non-Gaussianity from the hybrid potential
- Non-Gaussianity from resonant curvaton decay
- On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part II: the Trispectrum
- Use of delta N formalism - Difficulties in generating large local-type non-Gaussianity during inflation -
- Constraints on generating the primordial curvature perturbation and non-Gaussianity from instant preheating
- On Non-Gaussianities in Multi-Field Inflation (N fields): Bi- and Tri-spectra beyond Slow-Roll
- Trispectrum from Ghost Inflation
- On the non-Gaussianity from Recombination
- Beauty is Distractive: Particle production during multifield inflation
- The scale of gravity and the cosmological constant within a landscape
- General analytic predictions of two-field inflation and perturbative reheating
- Relativistic effects and primordial non-Gaussianity in the galaxy bias
- Large trispectrum in two-field slow-roll inflation
- Density Perturbations from Modulated Decay of the Curvaton
- Implications of Planck results for models with local type non-Gaussianity
- Temporal enhancement of super-horizon curvature perturbations from decays of two curvatons and its cosmological consequences
- Spectator field models in light of spectral index after Planck
- Free light fields can change the predictions of hybrid inflation
- What Planck does not tell us about inflation
- CMB spectral distortions in generic two-field models
- Particle Production during Inflation in Light of PLANCK
- Modulation of the waterfall by a gauge field
- Supersymmetric hybrid inflation with a light scalar
- Non-gaussianity and Statistical Anisotropy in Cosmological Inflationary Models
- The quantum origin of cosmic structure: theory and observations
- Thermal Inflation with a Thermal Waterfall Scalar Field Coupled to a Light Spectator Scalar Field
- Cosmological correlation functions in scalar and vector inflationary models
- The Size of Local Bispectrum and Trispectrum in a Non-Minimal Inflation