Nonperturbative de Sitter vacua via α′ corrections
2019 ◽
Vol 28
(14)
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pp. 1943002
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The higher-derivative [Formula: see text] corrections consistent with [Formula: see text] duality invariance can be completely classified for cosmological, purely time-dependent backgrounds. This result is used to show that there are duality invariant theories featuring string-frame de Sitter vacua as solutions that are nonperturbative in [Formula: see text], thus suggesting that classical string theory may realize de Sitter solutions in an unexpected fashion.
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