Non-perturbative de Sitter vacua via ${\alpha }^{\prime }$ corrections

Abstract

The higher-derivative ${\alpha }^{\prime }$ corrections consistent with $O(d,d)$ 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 non-perturbative in ${\alpha }^{\prime }$, thus suggesting that classical string theory may realize de Sitter solutions in an unexpected fashion.

7 pages, Second Prize Essay for the Gravity Research Foundation 2019 Awards for Essays on Gravitation

References in corpus (1)

• Double Field Theory at Order ${\alpha }^{\prime }$

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