1210.3692 (Mohammad Hossein Namjoo et al.)

Violation of non-Gaussianity consistency relation in a single field
inflationary model    [PDF]

Mohammad Hossein Namjoo, Hassan Firouzjahi, Misao Sasaki

In this paper we present a simple, toy model of single field inflation in which the standard non-Gaussianity consistency condition is violated. In this model the curvature perturbations on super-horizon scales are not conserved and the decaying modes of perturbations are not negligible. As a result a large local non-Gaussianity can be obtained in the squeezed limit which violates the standard non-Gaussianity consistency condition for the single field models.

View original: http://arxiv.org/abs/1210.3692