Primordial Non-Gaussianities from Inflation Models

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.

Comments: 84 pages, invited review for special issue of Advances in Astronomy on "Testing the Gaussianity and Statistical Isotropy of the Universe"; v3, various improvement and corrections, especially in Sec.6.4, 8.1 & 9.2