Note on Non-Gaussianities in Two-field Inflation

Understand

Two-field slow-roll inflation is the most conservative modification of a single-field model.

• The main motivations to study it are its entropic mode and non-Gaussianity.
• Several years ago, for a two-field model with additive separable potentials, Vernizzi and Wands invented an analytic method to estimate its non-Gaussianities.
• Later on, Choi et al.