Non-perturbative effective interactions from fluxes

TL;DR

This paper investigates non-perturbative effects from D-brane instantons in flux compactifications, revealing a variety of instanton-generated interactions relevant for moduli stabilization and phenomenology.

Contribution

It provides a detailed computation of instanton effects in a specific flux compactification model, highlighting new types of interactions induced by fluxes and instantons.

Findings

Discovery of flux-induced non-supersymmetric instanton interactions

Identification of a range of instanton-generated F- and D-term interactions

Demonstration of rich non-perturbative effects in a local flux compactification model

Abstract

Motivated by possible implications on the problem of moduli stabilization and other phenomenological aspects, we study D-brane instanton effects in flux compactifications. We focus on a local model and compute non-perturbative interactions generated by gauge and stringy instantons in a N = 1 quiver theory with gauge group U(N_0) x U(N_1) and matter in the bifundamentals. This model is engineered with fractional D3-branes at a C^3/(Z_2 x Z_2) singularity, and its non-perturbative sectors are described by introducing fractional D-instantons. We find a rich variety of instanton-generated F- and D-term interactions, ranging from superpotentials and Beasley-Witten like multi-fermion terms to non-supersymmetric flux-induced instanton interactions.