Preheating after N-flation

Abstract

We study preheating in N-flation, assuming the Marčenko-Pastur mass distribution, equal energy initial conditions at the beginning of inflation and equal axion-matter couplings, where matter is taken to be a single, massless bosonic field. By numerical analysis we find that preheating via parametric resonance is suppressed, indicating that the old theory of perturbative preheating is applicable. While the tensor-to-scalar ratio, the non-Gaussianity parameters and the scalar spectral index computed for N-flation are similar to those in single field inflation (at least within an observationally viable parameter region), our results suggest that the physics of preheating can differ significantly from the single field case.

14 pages, 14 figures, references added, fixed typos

References in corpus (42)

• 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
• de Sitter Vacua in String Theory
• Towards the Theory of Reheating After Inflation
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• Inflation Dynamics and Reheating
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Universe Reheating after Inflation
• Adiabatic and entropy perturbations from inflation
• Assisted inflation
• Structure of Resonance in Preheating after Inflation
• Classical decay of inflaton
• Equation of state and Beginning of Thermalization After Preheating
• Preheating with Trilinear Interactions: Tachyonic Resonance
• Lattice study of classical inflaton decay
• Generalized Assisted Inflation
• Random Matrices and the Spectrum of N-flation
• The Universe after inflation: the wide resonance case
• Resonant decay of Bose condensates
• Non-Gaussianities in Multi-field Inflation
• M-Theory Inflation from Multi M5-Brane Dynamics
• Inflation models and observation
• Dynamics of Assisted Inflation
• Multiple field inflation
• On the Realization of Assisted Inflation
• Assisted Chaotic Inflation in Higher Dimensional Theories
• Nflation: multi-field inflationary dynamics and perturbations
• Nflation: non-gaussianity in the horizon-crossing approximation
• Reheating in the Presence of Noise
• Non-Gaussianities in N-flation
• On Perturbation Spectra of N-flation
• Inflation from Tachyon Condensation, Large N Effects
• Parametric Resonance in an Expanding Universe
• Dynamics and perturbations in assisted chaotic inflation
• Reheating in the Presence of Inhomogeneous Noise
• Reheating Closed String Inflation
• Inflationary Reheating Classes via Spectral Methods
• Inflationary Reheating in Grand Unified Theories
• End of multi-field inflation and the perturbation spectrum
• The N-Tachyon Assisted Inflation
• Effects of white noise on parametric resonance in $\lambda {\varphi }^4$ theory

Cited by in corpus (31)

• Reheating in Inflationary Cosmology: Theory and Applications
• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• The art of simulating the early Universe -- Part I
• Preheating after Multifield Inflation with Nonminimal Couplings, I: Covariant Formalism and Attractor Behavior
• Energy Transfer in Multi Field Inflation and Cosmological Perturbations
• Reheating the Universe After Multi-Field Inflation
• Preheating after multifield inflation with nonminimal couplings, II: Resonance Structure
• N-flation with Hierarchically Light Axions in String Compactifications
• MultiModeCode: An efficient numerical solver for multifield inflation
• Perturbative Reheating After Multiple-Field Inflation: The Impact on Primordial Observables
• Reheating, Multifield Inflation and the Fate of the Primordial Observables
• On Non-Gaussianities in Multi-Field Inflation (N fields): Bi- and Tri-spectra beyond Slow-Roll
• Reheating and Dark Matter Freeze-in in the Higgs-$R^2$ Inflation Model
• Beauty is Distractive: Particle production during multifield inflation
• A Theory of Self-Resonance After Inflation, Part 1: Adiabatic and Isocurvature Goldstone Modes
• On the Suppression of Parametric Resonance and the Viability of Tachyonic Preheating after Multi-Field Inflation
• Multi-Field Inflation on the Landscape
• Multifield dynamics of supersymmetric Higgs inflation in SU(5) GUT
• A Theory of Self-Resonance After Inflation, Part 2: Quantum Mechanics and Particle-Antiparticle Asymmetry
• Observable Signatures of Inflaton Decays
• Effect of reheating on predictions following multiple-field inflation
• Reheating in tachyonic inflationary models: Effects on the large scale curvature perturbations
• Multifield Reheating after Modular $j$-Inflation
• Yang-Mills Propagators and QCD
• Preheating after Multi-field Inflation
• Enhanced Preheating after Multi-Field Inflation: On the Importance of being Special
• Particle Production during Inflation in Light of PLANCK
• Reheating consistency condition on the classically conformal $U(1{)}_{B-L}$ Higgs inflation model
• Entropy Perturbations in N-flation
• Shape of the inflaton potential and the efficiency of the universe heating
• Curvaton mechanism after multi-field inflation