Inhomogeneous preheating in multi-field models of cosmological perturbation

TL;DR

This paper investigates inhomogeneous preheating in multi-field cosmological models, focusing on how different potentials for a light field influence perturbation generation after preheating.

Contribution

It introduces analysis of two potential types for the light field in multi-field preheating scenarios, highlighting their effects on cosmological perturbations.

Findings

Enhanced symmetric point trapping after preheating

Impact of light field potential on perturbation generation

Differences between potential types in perturbation outcomes

Abstract

We consider inhomogeneous preheating in multi-field models of cosmological perturbation. After preheating, two fields are trapped at an enhanced symmetric point. One field is an oscillating field and the other is a light field that plays an important role in generating perturbation. In this presentation, we consider two types of potential for the light field.