Gyroscopic Inflation

TL;DR

This paper introduces a novel multi-field inflation model maintaining nearly constant potential energy, with a controlled effective field theory approach, potentially detectable gravitational waves, and suppressed quantum gravitational effects.

Contribution

It presents the simplest realization of a gyroscopic inflation framework using a well-controlled effective field theory with global shift symmetry.

Findings

Potentially observable primordial gravitational waves.

A controlled, weakly-coupled effective field theory model.

Suppressed nonperturbative quantum gravitational effects.

Abstract

We propose a new framework for multi-field inflation in which a nearly constant potential energy is maintained during inflation before decreasing rapidly, in a manner analogous to a classical top spinning upright for a long time before falling down. We provide the simplest realization of such dynamics as a well-controlled, weakly-coupled effective field theory with a global shift symmetry. Nonperturbative quantum gravitational effects, which break global symmetries, are suppressed in this model. Primordial gravitational waves may be within experimental reach.