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Refining the boundaries of the classical de Sitter landscape

Open Access
Regular Article - Theoretical Physics

Abstract

We derive highly constraining no-go theorems for classical de Sitter backgrounds of string theory, with parallel sources; this should impact the embedding of cosmological models. We study ten-dimensional vacua of type II supergravities with parallel and backreacted orientifold O p -planes and D p -branes, on four-dimensional de Sitter spacetime times a compact manifold. Vacua for p = 3, 7 or 8 are completely excluded, and we obtain tight constraints for p = 4, 5, 6. This is achieved through the derivation of an enlightening expression for the four-dimensional Ricci scalar. Further interesting expressions and no-go theorems are obtained. The paper is self-contained so technical aspects, including conventions, might be of more general interest.

Keywords

Flux compactifications Supergravity Models Superstring Vacua 

Notes

Open Access

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Copyright information

© The Author(s) 2017

Authors and Affiliations

  1. 1.Max-Planck-Institut für GravitationsphysikAlbert-Einstein-InstitutPotsdam-GolmGermany
  2. 2.Institut für Mathematik, Humboldt-Universität zu Berlin, IRIS-AdlershofBerlinGermany
  3. 3.Institut de Physique Théorique, Université Paris Saclay, CEA, CNRSGif sur YvetteFrance

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