Nonlinear curvature perturbations in an exactly soluble model of multi-component slow-roll inflation

Abstract

Using the nonlinear $\delta N$ formalism, we consider a simple exactly soluble model of multi-component slow-roll inflation in which the nonlinear curvature perturbation can be evaluated analytically.

Comments: 4 pages, no figure, typos corrected, references added, final version to be published in CQG