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Control issues of KKLT

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arxiv 2009.03914 v3 pith:ZOXS6QP4 submitted 2020-09-08 hep-th

Xin Gao , Arthur Hebecker , Daniel Junghans This is my paper · ORCID
classification hep-th
keywords controlcontrolledissueskkltsingularitiesanalyzeapproximationbecomes
verification ladder T0 review T1 audit T2 compute T3 formal
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We analyze to which extent the KKLT proposal for the construction of de Sitter vacua in string theory is quantitatively controlled. Our focus is on the quality of the 10d supergravity approximation. As our main finding, we uncover and quantify an issue which one may want to call the "singular-bulk problem". In particular, we show that, requiring the curvature to be small in the conifold region, one is generically forced into a regime where the warp factor becomes negative in a significant part of the Calabi-Yau orientifold. This implies true singularities, independent of the familiar, string-theoretically controlled singularities of this type in the vicinity of O-planes. We also discuss possible escape routes as well as other control issues, related to the need for a large tadpole and hence for a complicated topology.

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Cited by 5 Pith papers

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    hep-th 2025-07 conditional novelty 5.0 of 10

    New non-singular IIA solutions with internal space (deformed conifold × S1)/Z2 provide warped G2 throats with finite 4-cycle or 3-cycle at the tip.

  5. Coexisting Flux String Vacua from Numerical K\"ahler Moduli Stabilisation

    hep-th 2025-07 conditional novelty 5.0 of 10

    Numerical scans of Type IIB compactifications find single scalar potentials containing coexisting KKLT/LVS and Kahler-uplifted/LVS minima, including AdS, Minkowski, and dS pairs.

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