Heterotic/Type II Duality in D=4 and String/String Duality

Abstract

We discuss the structure of heterotic/type II duality in four dimensions as a consequence of string-string duality in six dimensions. We emphasize the new features in four dimensions which go beyond the six dimensional vacuum structure and pertain to the way particular K3 fibers can be embedded in Calabi-Yau threefolds. Our focus is on hypersurfaces as well as complete intersections of codimension two which arise via conifold transitions.

6 pages, espcrc2

References in corpus (9)

• String Theory Dynamics In Various Dimensions
• Unity of Superstring Dualities
• Massless Black Holes and Conifolds in String Theory
• Strong-Weak Coupling Duality in Four Dimensional String Theory
• Nonperturbative Results on the Point Particle Limit of N=2 Heterotic String Compactifications
• K3--Fibrations and Heterotic-Type II String Duality
• Black Hole Condensation and the Unification of String Vacua
• Chains of N=2, D=4 heterotic/type II duals
• Landau-Ginzburg String Vacua

Cited by in corpus (4)

• K3-fibered Calabi-Yau threefolds I, the twist map
• Dualities and phase transitions for Calabi-Yau 3folds and 4folds
• Deformations, Moduli Stabilisation and Gauge Couplings at One-Loop
• Orbifolds of M-Theory and Type II String Theories in Two Dimensions