Primordial non-Gaussianities from inflation

Details Primordial non-Gaussianities from inflation Primordial non-Gaussianities from inflation

2011-01-06

arxiv.org/abs/1101.1308v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

33 pages, 4 figures, lecture notes presented at the Niels Bohr Institute

Scientific paper

These notes present a detailed introduction to Maldacena's calculation of the cubic terms in the inflationary action. These interactions are important since they produce the most readily observable evidence for a non-Gaussian component in the pattern of primordial fluctuations produced by inflation. In the simplest class of inflationary theories, those with only a single scalar field participating in the inflationary era, these non-Gaussianities are predicted to be extremely small, as will be reviewed here.

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