2020/09/30 by Xin Gao, Arthur Hebecker, Daniel Junghans
Physics and Astronomy · #Black Holes and Theoretical Physics #Conifold #Control (management) #Curvature #Focus (optics) #Gravitational singularity #Limit (mathematics) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #String theory #Supergravity #hep-th
paper · pdf · doi:10.1002/prop.202000089
published as Fortsch.Phys. 2020, 68, 2000089 · 36 pages, 4 figures. v2: referencing improved. v3: more details added
openalex created_date 2020/09/14 · openalex publication_date 2020/09/30 · arxiv created 2020/12/09 · arxiv updated 2021/07/07 · openalex updated_date 2026/08/06
Abstract 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.