1301.6552 (N. A. Koshelev)

To the study of non-Gaussianity in two-field slow-roll inflation    [PDF]

N. A. Koshelev

The general expression for the second order large scale curvature perturbation in the form of a functional over a background solution is derived. The explicit expressions was obtained for two special forms of the inflationary potential. In the considered cases, it is shown that a significant level of non-Gaussianity can be generated during the super-Hubble evolution only if nonadiabatic perturbations dominate at the end of inflation.

View original: http://arxiv.org/abs/1301.6552