Non-Gaussianities from inflation

The inflationary paradigm generically predicts Gaussian distributed metric perturbations with a scale invariant power spectrum. Although current data are in agreement with these predictions, small deviations from Gaussianity might be detectable in high accuracy experiments. Such deviations are a powerful way to discriminate among inflationary models. In particular, we will present a class of multi-field inflationary models that could lead to significant non-Gaussian adiabatic fluctuations. In such models, primordial isocurvature modes develop fluctuations with non trivial statistical properties that can to be transfered to the metric fluctuations.