The primordial curvature perturbation from lattice simulations

Abstract

We study the contribution to the primordial curvature perturbation on observational scales generated by the reheating field in massless preheating. To do so we use lattice simulations and a recent extension to the $\delta N$ formalism. The work demonstrates the functionality of these techniques for calculating the observational signatures of models in which non-perturbative reheating involves a light scalar field.

7 pages, 3 figures

References in corpus (8)

• Non-Gaussian Spikes from Chaotic Billiards in Inflation Preheating
• Lattice calculation of non-Gaussianity from preheating
• The Art of Lattice and Gravity Waves from Preheating
• Non-gaussianity and cosmic uncertainty in curvaton-type models
• Non-Gaussianity from massless preheating
• Numerical evaluation of the bispectrum in multiple field inflation
• Parametric Resonance of Entropy Perturbations in Massless Preheating
• Non-perturbative $\delta N$

Cited by in corpus (7)

• The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
• The art of simulating the early Universe -- Part I
• Inflationary Butterfly Effect: Non-perturbative Dynamics From Small-Scale Features
• Spillway Preheating
• Present and future of CosmoLattice
• Curvature perturbations from preheating with scale dependence
• Non-Gaussianity after many-field reheating