Self-Dual Nonsupersymmetric Type II String Compactifications

Abstract

It has recently been proposed that certain nonsupersymmetric type II orbifolds have vanishing perturbative contributions to the cosmological constant. We show that techniques of Sen and Vafa allow one to construct dual type II descriptions of these models (some of which have no weakly coupled heterotic dual). The dual type II models are given by the same orbifolds with the string coupling $S$ and a $T^2$ volume $T$ exchanged. This allows us to argue that in various strongly coupled limits of the original type II models, there are weakly coupled duals which exhibit the same perturbative cancellations as the original models.

9 pages, harvmac big; typo in references corrected

References in corpus (3)

• 4d Conformal Field Theories and Strings on Orbifolds
• Vacuum Energy Cancellation in a Non-supersymmetric String
• String Duality and Non-supersymmetric Strings

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• Closed String Tachyons, AdS/CFT, and Large N QCD
• Asyzygies, modular forms, and the superstring measure II
• Bose-Fermi Degeneracy and Duality in Non-Supersymmetric Strings
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• Asyzygies, modular forms, and the superstring measure I
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