What if string theory has no de Sitter vacua?
نویسندگان
چکیده
منابع مشابه
On De Sitter Vacua in Strongly Coupled Heterotic String Theory
We describe how 4d de Sitter vacua might emerge from 11d heterotic M-theory. Non-perturbative effects and G-fluxes play a crucial role leading to vacua with Fterm supersymmetry breaking and a positive energy density. Charged scalar matter fields are no longer massless in these vacua thus solving one of the problems of the heterotic string. Moreover, interesting dark matter candidates appear in ...
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We explore the possibility of obtaining de Sitter vacua in strongly coupled heterotic models by adding various corrections to the supergravity potential energy. We show that, in a generic compactification scenario, Fayet-Illiopulos terms can generate a de Sitter vacuum. The cosmological constant in this vacuum can be fine tuned to be consistent with observation. We also study moduli potentials ...
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We propose a new mechanism for obtaining de Sitter vacua in type IIB string theory compactified on (orientifolded) Calabi-Yau manifolds similar to those recently studied by Kachru, Kallosh, Linde and Trivedi (KKLT). dS vacuum appears in KKLT model after uplifting an AdS vacuum by adding an anti-D3-brane, which explicitly breaks supersymmetry. We accomplish the same goal by adding fluxes of gaug...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2018
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271818300070