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 |