Kaehler Corrections for the Volume Modulus of Flux Compactifications

TL;DR

This paper investigates how supergravity loop corrections, similar to Casimir effects, influence the volume modulus in flux compactifications, potentially aiding in radion stabilization.

Contribution

It analyzes the form of supergravity loop corrections to the Kaehler potential in no-scale models, highlighting their role in radion stabilization.

Findings

Loop corrections affect the 4d scalar potential of the radion.

Corrections interplay with alpha' effects in stabilization.

Potential mechanism for radion stabilization proposed.

Abstract

No-scale models arise in many compactifications of string theory and supergravity, the most prominent recent example being type IIB flux compactifications. Focussing on the case where the no-scale field is a single unstabilized volume modulus (radion), we analyse the general form of supergravity loop corrections that affect the no-scale structure of the Kaehler potential. These corrections contribute to the 4d scalar potential of the radion in a way that is similar to the Casimir effect. We discuss the interplay of this loop effect with string-theoretic alpha' corrections and its possible role in the stabilization of the radion.