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Type I' and Real Algebraic Geometry

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arxiv hep-th/0001029 v1 pith:LT2SJKEB submitted 2000-01-07 hep-th

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

We revisit the duality between type I' and heterotic strings in 9 dimensions. We resolve a puzzle about the validity of type I' perturbation theory and show that there are regions in moduli which are not within the reach of type I' perturbation theory. We find however, that all regions of moduli are described by a special class of real elliptic $K3$'s in the limit where the $K3$ shrinks to a one dimensional interval. We find a precise map between the geometry of dilaton and branes of type I' on the one hand and the geometry of real elliptic $K3$ on the other. We also argue more generally that strong coupling limits of string compactifications generically do not have a weakly coupled dual in terms of any known theory (as is exemplified by the strong coupling limit of heterotic strings in 9 dimensions for certain range of parameters).

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Forward citations

Cited by 3 Pith papers

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

  1. String probes, simple currents, and the no global symmetries conjecture

    hep-th 2026-05 unverdicted novelty 6.0 of 10

    Chiral simple current extensions on the worldsheet reproduce and generalize obstructions to gauging center one-form symmetries in 6d and 8d string compactifications while clarifying BPS particle requirements upon circ...

  2. Explicit Bounds on the Spectrum of 6d N=(1,0) Supergravity

    hep-th 2025-07 reject novelty 6.0 of 10

    A new geometric strategy using 1/6-log-canonical pairs and P1 fibrations is proposed to bound the tensor spectrum of 6d N=(1,0) supergravity, with an announced bound T ≤ 567 whose proof is deferred to a companion paper.

  3. More on 8d non-supersymmetric branes and heterotic strings

    hep-th 2025-05 conditional novelty 6.0 of 10

    The E8 non-supersymmetric heterotic string on T^2 has exactly 22 maximal gauge enhancements, found by two independent methods, with massless spectra listed for each.

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