(A)dS Backgrounds from Asymmetric Orientifolds

Abstract

I present asymmetric orientifold models which, with the addition of RR fluxes, fix all the NS NS moduli including the dilaton. In critical string theory, this gives new AdS backgrounds with (discretely tunably) weak string coupling. Extrapolating to super-critical string theory, this construction leads to a promising candidate for a metastable de Sitter background with string coupling of order 1/10 and dS radius of order 100 times the string scale. Extrapolating further to larger and larger super-critical dimension suggests the possibility of finding de Sitter backgrounds with weaker and weaker string coupling. This note is an updated version of the last part of my Strings 2001 talk.

12 pages, harvmac big, contribution to Strings 2001

References in corpus (4)

• The String Dilaton and a Least Coupling Principle
• A Correspondence Principle for Black Holes and Strings
• Stabilization of Sub-Millimeter Dimensions: The New Guise of the Hierarchy Problem
• M-theory observables for cosmological space-times

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• Simple de Sitter Solutions
• Superconformal Gauge Theories and Non-Critical Superstrings
• de Sitter Space in Non-Critical String Theory
• TASI/PiTP/ISS Lectures on Moduli and Microphysics
• Does the first chaotic inflation model in supergravity provide the best fit to the Planck data?
• Accelerating Universes and String Theory
• Hyperbolic compactification of M-theory and de Sitter quantum gravity
• Dimensional Mutation and Spacelike Singularities
• de Sitter entropy from conformal field theory
• D-Sitter Space: Causal Structure, Thermodynamics, and Entropy
• Bound-states of D-branes in L-R asymmetric superstring vacua
• AdS and dS Entropy from String Junctions