A Single Field Inflation Model with Large Local Non-Gaussianity

TL;DR

This paper introduces a self-consistent single field inflation model capable of producing large local non-Gaussianity, challenging the prevailing belief that such non-Gaussianity rules out all single field inflation models.

Contribution

The authors construct the first explicit, self-consistent single field inflation model that generates large local non-Gaussianity, countering previous assumptions.

Findings

Demonstrates a viable model with large local non-Gaussianity

Challenges the single field consistency condition assumptions

Provides a counterexample to the belief that large non-Gaussianity rules out all single field models

Abstract

A detection of large local form non-Gaussianity is considered to be able to rule out all single field inflation models. This statement is based on a single field consistency condition. Despite the awareness of some implicit assumptions in the derivation of this condition and the demonstration of corresponding examples that illustrate these caveats, to date there is still no explicit and self-consistent model which can serve as a counterexample to this statement. We present such a model in this Letter.