Primordial Non-Gaussianities from Inflation Models

TL;DR

This review explains how inflation models can produce observable non-Gaussianities in the early universe, highlighting methods to compute them and their significance for understanding inflation dynamics.

Contribution

It provides a comprehensive pedagogical overview of formalisms, mechanisms, and signatures related to primordial non-Gaussianities in inflation models.

Findings

Different inflation mechanisms can generate observable non-Gaussianities.

Distinctive signatures help probe inflation dynamics.

The review summarizes key theoretical tools and results.

Abstract

This is a pedagogical review on primordial non-Gaussianities from inflation models. We introduce formalisms and techniques that are used to compute such quantities. We review different mechanisms which can generate observable large non-Gaussianities during inflation, and distinctive signatures they leave on the non-Gaussian profiles. They are potentially powerful probes to the dynamics of inflation. We also provide a non-technical and qualitative summary of the main results and underlying physics.