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Advances in Astronomy
Volume 2010, Article ID 638979, 43 pages
http://dx.doi.org/10.1155/2010/638979
Review Article

Primordial Non-Gaussianities from Inflation Models

Center for Theoretical Cosmology, Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 0WA, UK

Received 15 February 2010; Accepted 9 June 2010

Academic Editor: Sarah Shandera

Copyright © 2010 Xingang Chen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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 nontechnical and qualitative summary of the main results and underlying physics.