Dante's Inferno

TL;DR

This paper introduces a two-field inflation model embedded in string theory, similar to axion monodromy, predicting large tensor modes with controlled quantum corrections within a subplanckian field space.

Contribution

It presents a novel two-field inflation model within string theory that achieves large-field inflation with manageable quantum corrections.

Findings

Predictions match chaotic inflation, including large tensor modes.

Inflation occurs within a subplanckian field space, enhancing theoretical control.

Model is a straightforward extension of axion monodromy models.

Abstract

We present a simple two-field model of inflation and show how to embed it in string theory as a straightforward generalization of axion monodromy models. Phenomenologically, the predictions are equivalent to those of chaotic inflation, and in particular include observably large tensor modes. The whole high-scale large-field inflationary dynamics takes place within a region of field space that is parametrically subplanckian in diameter, hence improving our ability to control quantum corrections and achieve slow-roll inflation.