de Sitter in non-supersymmetric string theories: no-go theorems and brane-worlds
Ivano Basile, Stefano Lanza
Abstract
A bstract We study de Sitter configurations in ten-dimensional string models where supersymmetry is either absent or broken at the string scale. To this end, we derive expressions for the cosmological constant in general warped flux compactifications with localized sources, which yield no-go theorems that extend previous works on supersymmetric cases. We frame our results within a dimensional reduction and connect them to a number of Swampland conjectures, corroborating them further in the absence of supersymmetry. Furthermore, we construct a top-down string embedding of de Sitter brane-world cosmologies within unstable anti-de Sitter landscapes, providing a concrete realization of a recently revisited proposal.
Topics & Concepts
PhysicsDe Sitter universeEmbeddingString (physics)Theoretical physicsCosmological constantString theoryDe Sitter spaceRealization (probability)Mathematical physicsSupersymmetryAnti-de Sitter spacede Sitter invariant special relativityNon-critical string theoryDimensional reductionde Sitter–Schwarzschild metricConstant (computer programming)UniverseString cosmologyExtra dimensionsParticle physicsCompactification (mathematics)Cosmological modelFrame (networking)Classical mechanicsBlack Holes and Theoretical PhysicsNoncommutative and Quantum Gravity TheoriesAlgebraic structures and combinatorial models