Non-Gaussianity after many-field reheating
arXiv:2010.06001 · doi:10.1103/PhysRevD.103.083532
Abstract
We numerically investigate reheating after quadratic inflation with up to 65 fields, focusing on the production of non-Gaussianity. We consider several sets of initial conditions, masses and decay rates. As expected we find that the reheating phase can have a significant effect on the non-Gaussian signal, but that for this number of fields a detectable level of non-Gaussianity requires the initial conditions, mass range and decay rates to be ordered in a particular way. We speculate on whether this might change in the N-flation limit.
8 pages, 3 figures
References in corpus (19)
- Flux Compactification
- Nonperturbative Dynamics Of Reheating After Inflation: A Review
- A numerical study of non-gaussianity in the curvaton scenario
- DEFROST: A New Code for Simulating Preheating after Inflation
- The Art of Lattice and Gravity Waves from Preheating
- Primordial non-Gaussianity from two curvaton decays
- Inflationary perturbation theory is geometrical optics in phase space
- Numerical evaluation of the bispectrum in multiple field inflation
- Moment transport equations for the primordial curvature perturbation
- Exploring a string-like landscape
- Time-Scales for Nonlinear Processes in Preheating after Multifield Inflation with Nonminimal Couplings
- Reheating, Multifield Inflation and the Fate of the Primordial Observables
- Transport equations for the inflationary trispectrum
- Numerically evaluating the bispectrum in curved field-space - with PyTransport 2.0
- General analytic predictions of two-field inflation and perturbative reheating
- Effect of reheating on predictions following multiple-field inflation
- How the curvaton scenario, modulated reheating and an inhomogeneous end of inflation are related
- A short note on the curvature perturbation at second order
- Mixed perturbations from an Inflaton and Two Curvatons - towards understanding non-gaussianity in more complicated curvaton scenarios