title: Constraining de Sitter Space in String Theory.
abstract: We argue that the heterotic string does not have classical vacua corresponding to de Sitter space-times of dimension four or higher. The same conclusion applies to type II vacua in the absence of Ramond-Ramond fluxes. Our argument extends prior supergravity no-go results to regimes of high curvature. We discuss the interpretation of the heterotic result from the perspective of dual type II orientifold constructions. Our result suggests that the genericity arguments used in string landscape discussions should be viewed with caution.
authors: Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.
authors: David
authors: D
authors: Kutasov
authors: Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.
authors: Travis
authors: T
authors: Maxfield
authors: Department of Mathematics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors: Ilarion
authors: I
authors: Melnikov
authors: Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.
authors: Savdeep
authors: S
authors: Sethi