Exploring SU(3) Structure Moduli Spaces with Integrable G2 Structures

TL;DR

This paper investigates the moduli space of SU(3) structure manifolds within heterotic supergravity, analyzing how these structures evolve along flows constrained by torsion and flux, and exploring the possibility of Calabi-Yau points within these flows.

Contribution

It introduces a G2 embedding approach to study SU(3) structure moduli flows, including the effects of flux and torsion constraints, revealing potential Calabi-Yau loci.

Findings

Flow of half-flat SU(3) structures may include Calabi-Yau points with flux.

Torsion preservation constrains G2 embedding and structure evolution.

Bianchi identities impose strong restrictions on the moduli space flows.

Abstract

We study the moduli space of SU(3) structure manifolds X that form the internal compact spaces in four-dimensional N=1/2 domain wall solutions of heterotic supergravity with flux. Together with the direction perpendicular to the four-dimensional domain wall, X forms a non-compact 7-manifold Y with torsionful G2 structure. We use this G2 embedding to explore how X(t) varies along paths C(t) in the SU(3) structure moduli space. Our analysis includes the Bianchi identities which strongly constrain the flow. We show that requiring that the SU(3) structure torsion is preserved along the path leads to constraints on the G2 torsion and the embedding of X in Y. Furthermore, we study flows along which the torsion classes of X go from zero to non-zero values. In particular, we present evidence that the flow of half-flat SU(3) structures may contain Calabi-Yau loci, in the presence of non-vanishing H-flux.