T-Duality in Gauged Linear Sigma-Models with Torsion

TL;DR

This paper explores T-duality in (0,2) gauged linear sigma models with torsion, revealing quantization constraints on moduli and relating torsional models to standard CY compactifications with different topologies.

Contribution

It provides a detailed analysis of dualities involving torsional GLSMs, including moduli quantization and connections to non-standard CY embeddings.

Findings

Quantization constraints on torus moduli for duality consistency

Dualities mapping the torus fiber onto itself

Relations between torsional GLSMs and CY models with non-standard embeddings

Abstract

(0,2) gauged linear sigma models with torsion, corresponding to principal torus bundles over warped CY bases, provide a useful framework for getting exact statements about perturbative dualities in the presence of fluxes. In this context we first study dualities mapping the torus fiber onto itself, implying the existence of quantization constraints on the torus moduli for consistency. Second, we investigate dualities mixing the principal torus bundle with the gauge bundle, relating the torsional GLSMs to ordinary ones corresponding to CY compactifications with non-standard embeddings, namely two classes of models with different target-space topologies.