Free-Field Construction of Heterotic String Compactified on Calabi-Yau Orbifolds via Correspondence with SCFT Minimal Models
This paper establishes a correspondence between free-field and minimal-model constructions for heterotic string compactifications on Berglund-Hübsch Calabi-Yau manifolds and their orbifolds, using this link to verify modular invariance and derive conditions for complete vertex operators.