Abstract
In this paper, 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 nonlinear dynamics on super-horizon scales.
| Original language | English |
|---|---|
| Pages (from-to) | 17 pages |
| Number of pages | 17 |
| Journal | Classical and Quantum Gravity |
| Volume | 27 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 21 Jun 2010 |