Lattice calculation of non-Gaussianity from preheating

Abstract

If light scalar fields are present at the end of inflation, their non-equilibrium dynamics such as parametric resonance or a phase transition can produce non-Gaussian density perturbations. We show how these perturbations can be calculated using non-linear lattice field theory simulations and the separate universe approximation. In the massless preheating model, we find that some parameter values are excluded while others lead to acceptable but observable levels of non-Gaussianity. This shows that preheating can be an important factor in assessing the viability of inflationary models.

4 pages, 1 figure; erratum added

References in corpus (14)

• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Reheating after Inflation
• Inflation Dynamics and Reheating
• Structure of Resonance in Preheating after Inflation
• Classical decay of inflaton
• Lattice study of classical inflaton decay
• Detecting a small perturbation through its non-Gaussianity
• Non-Gaussianity from Preheating
• Limits on f_NL parameters from WMAP 3yr data
• Massless Metric Preheating
• Very Large Primordial Non-Gaussianity from multi-field: Application to Massless Preheating
• Are black holes over-produced during preheating?
• Generating the primordial curvature perturbations in preheating
• Inflaton Fragmentation After lambda phi^4 Inflation

Cited by in corpus (79)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Primordial Non-Gaussianities from Inflation Models
• Reheating in Inflationary Cosmology: Theory and Applications
• Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
• Reheating predictions in single field inflation
• The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
• Hunting for Primordial Non-Gaussianity in the Cosmic Microwave Background
• Gravity waves and non-Gaussian features from particle production in a sector gravitationally coupled to the inflaton
• Large-scale Bias and Efficient Generation of Initial Conditions for Non-Local Primordial Non-Gaussianity
• Non-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models
• Planck 2018 results. IX. Constraints on primordial non-Gaussianity
• Primordial non-Gaussianity: large-scale structure signature in the perturbative bias model
• The Matter Bounce Curvaton Scenario
• Non-Gaussian Spikes from Chaotic Billiards in Inflation Preheating
• Constraining axion inflation with gravitational waves from preheating
• The art of simulating the early Universe -- Part I
• Large non-Gaussianity from multi-brid inflation
• Evolution of fNL to the adiabatic limit
• Gravitational wave production from preheating: parameter dependence
• The Art of Lattice and Gravity Waves from Preheating
• On Classification of Models of Large Local-Type Non-Gaussianity
• Preheating after multifield inflation with nonminimal couplings, III: Dynamical spacetime results
• Anisotropies in the Gravitational Wave Background from Preheating
• Preheating a bouncing universe
• Preheating after multifield inflation with nonminimal couplings, II: Resonance Structure
• PSpectRe: A Pseudo-Spectral Code for (P)reheating
• Parametric Resonance in the Early Universe - A Fitting Analysis
• Reconstruction of the primordial power spectrum of curvature perturbations using multiple data sets
• Preheating and the non-gaussianity of the curvature perturbation
• On the Anisotropy of the Gravitational Wave Background from Massless Preheating
• Angular inflation in multi-field $\alpha$-attractors
• Non-Gaussianity from massless preheating
• Preheating with Non-Minimal Kinetic Terms
• Nonlinear Dynamics of Preheating after Multifield Inflation with Nonminimal Couplings
• Scalar correlation functions in de Sitter space from the stochastic spectral expansion
• Low-cost fermions in classical field simulations
• Constraining inflation with future galaxy redshift surveys
• Non-Gaussianity from the hybrid potential
• Non-Gaussian Correlations Outside the Horizon
• Non-Gaussianity from resonant curvaton decay
• Use of delta N formalism - Difficulties in generating large local-type non-Gaussianity during inflation -
• Universality and scaling in multi-field $\alpha$-attractor preheating
• Lattice implementation of Abelian gauge theories with Chern-Simons number and an axion field
• Parametric Decay of the Curvaton
• Reheating, Multifield Inflation and the Fate of the Primordial Observables
• The charged inflaton and its gauge fields: preheating and initial conditions for reheating
• CUDAEASY - a GPU Accelerated Cosmological Lattice Program
• PyCOOL - a Cosmological Object-Oriented Lattice code written in Python
• Preheating after Small-Field Inflation
• A Cosmic Microscope for the Preheating Era
• General analytic predictions of two-field inflation and perturbative reheating
• Spillway Preheating
• Lectures on Reheating after Inflation
• Study of the preheating phase of chaotic inflation
• Primordial Power Spectrum features and $f_{NL}$ constraints
• Numerical study of inflationary preheating with arbitrary power-law potential and a realization of curvaton mechanism
• Statistics of general functions of a Gaussian field -application to non-Gaussianity from preheating-
• Curvature Perturbations From Stochastic Particle Production During Inflation
• Influence of Reheating on the Trispectrum and its Scale Dependence
• Hilltop inflation with preinflation from coupling to matter fields
• The primordial curvature perturbation from lattice simulations
• Electrically charged curvaton
• Present and future of CosmoLattice
• Non-perturbative $\delta N$
• Curvaton preheating revisited
• Constraints on variations in inflaton decay rate from modulated preheating
• High-redshift Mini-haloes from Modulated Preheating
• Supersymmetric hybrid inflation with a light scalar
• Deriving super-horizon curvature perturbations from the dynamics of preheating
• The Size of Local Bispectrum and Trispectrum in a Non-Minimal Inflation
• Curvature perturbations from kinetic preheating after $\alpha$-attractor inflation
• Observable predictions of generalised inflationary scenarios
• Curvature perturbations from preheating with scale dependence
• Curvature perturbations from vacuum transition during inflation
• Constraining primordial non-Gaussianity using Neural Networks
• Parameters of SUSY-Hybrid Inflation and the Process of Preheating