Scale-separated AdS${}_4$ vacua of IIA orientifolds and M-theory

Abstract

We revisit various aspects of AdS${}_4$ flux vacua with scale separation in type II supergravity and M-theory. We show that massless IIA allows both weakly and strongly coupled solutions for which the classical orientifold backreaction can be tuned small. This is explicitly verified by computing the backreaction at leading order in perturbation theory. We give evidence that the strongly coupled solutions can be lifted to scale-separated and sourceless (but classically singular) geometries in 11D supergravity.

arXiv comment43 pages

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