SUGRA chaotic inflation and moduli stabilisation

TL;DR

This paper explores implementing chaotic inflation within supergravity frameworks considering moduli stabilization, revealing challenges with generic potentials and proposing specific fine-tuned solutions for successful inflation.

Contribution

It demonstrates the difficulties of combining chaotic inflation with generic KKLT moduli stabilization and identifies conditions for viable models with fine-tuning.

Findings

Inflation fails with generic KKLT moduli potential.

Viable models require fine-tuning of the moduli sector.

Specific Kahler potential choices enable successful inflation.

Abstract

Chaotic inflation predicts a large gravitational wave signal which can be tested by the upcoming Planck satellite. We discuss a SUGRA implementation of chaotic inflation in the presence of moduli fields, and find that inflation does not work with a generic KKLT moduli stabilisation potential. A viable model can be constructed with a fine-tuned moduli sector, but only for a very specific choice of Kahler potential. Our analysis also shows that inflation models satisfying \partial_{i} W_{\rm inf}=0 for all inflation sector fields \phi_i can be combined successfully with a fine-tuned moduli sector.