Chaotic Inflation in Supergravity with Heisenberg Symmetry

TL;DR

This paper introduces a Heisenberg symmetry approach in supergravity to enable chaotic inflation, providing an alternative to shift symmetry, with stable moduli and predictions similar to standard models, potentially linked to string theory.

Contribution

It presents a novel use of Heisenberg symmetry in the Kahler potential for supergravity inflation models, stabilizing moduli and aligning with string theory frameworks.

Findings

Stable modulus field during inflation

Inflationary predictions match standard chaotic models

Potential connection to sneutrino inflation from string theory

Abstract

We propose the introduction of a Heisenberg symmetry of the Kahler potential to solve the problems with chaotic inflation in supergravity, as a viable alternative to the use of shift symmetry. The slope of the inflaton potential emerges from a small Heisenberg symmetry breaking term in the superpotential. The modulus field of the Heisenberg symmetry is stabilized and made heavy with the help of the large vacuum energy density during inflation. The observable predictions are indistinguishable from those of typical chaotic inflation models, however the form of the inflationary superpotential considered here may be interpreted in terms of sneutrino inflation arising from certain classes of string theory.