Non-Gaussianity of quantum fields during inflation

Details Non-Gaussianity of quantum fields during inflation Non-Gaussianity of quantum fields during inflation

2010-02-03

arxiv.org/abs/1002.0600v2

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 2 figures, references added, matches published version, invited review for CQG issue on non-linear cosmology

Scientific paper

In this review, we discuss how non-Gaussianity of cosmological perturbations arises from inflation. After introducing the in-in formalism to calculate the $n$-point correlation function of quantum fields, we present the computation of the bispectrum of the curvature perturbation generated in general single field inflation models. The shapes of the bispectrum are compared with the local-type non-Gaussianity that arises from non-linear dynamics on super-horizon scales.

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