de Sitter Minima from M theory and String theory

Abstract

We study M-theory compactification on ${\mathbb{T}}^7/{\mathbb{Z}}_2^3$ in the presence of a seven-flux, metric fluxes and KK monopoles. The effective four-dimensional supergravity has seven chiral multiplets whose couplings are specified by the $G_2$-structure of the internal manifold. We supplement the corresponding superpotential by a KKLT type non-perturbative exponential contribution for all, or for some of the seven moduli, and find a discrete set of supersymmetric Minkowski minima. We also study type IIA and type IIB string theory compactified on ${\mathbb{T}}^6/{\mathbb{Z}}_2^2$. In type IIA, we use a six-flux, geometric fluxes and non-perturbative exponents. In type IIB theory, we use F and H fluxes, and non-geometric Q and P fluxes, corresponding to consistently gauged supergravity with certain embedding tensor components, \emph{without non-perturbative exponents}. Also in these situations, we produce discrete Minkowski minima. Finally, to construct dS vacua starting from these Minkowski progenitors, we follow the procedure of mass production of dS vacua.

arXiv comment7 pages, 8 tables, v2: minor corrections and additions, v3: clarifications, published version

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• Do we live on the End of the World?
• Supersymmetric $d{S}_n$ solutions for $n\ge 5$ in $D=11$ supergravity
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