On classical de Sitter solutions and parametric control

A bstract Finding string backgrounds with de Sitter spacetime, where all approximations and corrections are controlled, is an open problem. We revisit the search for de Sitter solutions in the classical regime for specific type IIB supergravity compactifications on group manifolds, an under-explored...

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Bibliographic Details
Published in:The journal of high energy physics 2024-06, Vol.2024 (6), p.101-43, Article 101
Main Authors: Andriot, David, Ruehle, Fabian
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
de Sitter space
Elementary Particles
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Spacetime
String and Brane Phenomenology
String Theory
Supergravity
Superstring Vacua
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Summary:A bstract Finding string backgrounds with de Sitter spacetime, where all approximations and corrections are controlled, is an open problem. We revisit the search for de Sitter solutions in the classical regime for specific type IIB supergravity compactifications on group manifolds, an under-explored corner of the landscape that offers an interesting testing ground for swampland conjectures. While the supergravity de Sitter solutions we obtain numerically are ambiguous in terms of their classicality, we find an analytic scaling that makes four out of six compactification radii, as well as the overall volume, arbitrarily large. This potentially provides parametric control over corrections. If we could show that these solutions, or others to be found, are fully classical, they would constitute a counterexample to conjectures stating that asymptotic de Sitter solutions do not exist. We discuss this point in great detail.
ISSN:1029-8479
1126-6708
1029-8479
DOI:10.1007/JHEP06(2024)101