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Self-Dual Nonsupersymmetric Type II String Compactifications

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arxiv hep-th/9808056 v2 pith:QOTA7W2K submitted 1998-08-10 hep-th

classification hep-th
keywords typemodelscoupleddualnonsupersymmetricorbifoldsoriginalperturbative
verification ladder T0 review T1 audit T2 compute T3 formal

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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.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Asymmetric orbifolds with vanishing one-loop vacuum energy

    hep-th 2026-02 unverdicted novelty 7.0 of 10

    Non-supersymmetric type II asymmetric orbifolds with Z_k x Z_k Abelian point groups (k=2,3,4) admit vanishing one-loop vacuum energy via sector-wise conservation of a supercharge-like operator.

  2. Non-abelian asymmetric orbifolds with vanishing one-loop vacuum energy

    hep-th 2026-07 conditional novelty 6.0 of 10

    A classification finds 17 four-dimensional Type II asymmetric orbifolds with non-abelian point groups and pointwise vanishing one-loop vacuum energy, each also realizable as a Scherk-Schwarz compactification.

  3. Bordisms between 9d type IIB supergravities and commutator widths of duality groups

    hep-th 2026-05 unverdicted novelty 6.0 of 10

    Proposes a refinement of the Swampland Cobordism Conjecture for Ω1(BG) with duality bundle G, where diverging commutator width of G requires infinitely many duality defects to realize monodromies via gravitational solitons.

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