Comments on classical AdS flux vacua with scale separation

Abstract

AdS flux vacua with a parametric separation between the AdS and KK scales have been conjectured to be in the Swampland. We study flux compactifications of massive IIA supergravity with O6 planes which are claimed to allow moduli-stabilised and scale separated AdS${}_3$ and AdS${}_4$ vacua at arbitrary weak coupling and large volume. A recent refinement of the AdS Distance Conjecture is shown to be inconsistent with the class of AdS${}_3$ vacua because the requisite discrete higher form symmetries are absent. We further perform a tree-level study of non-perturbative decays for the nonsupersymmetric versions of the AdS${}_3$ solutions, and find that the vacua are stable within this approximation. Finally, we provide an initial investigation of the would-be dual CFT${}_2$'s and CFT${}_3$'s. We study roughly a dozen different models and find for all AdS${}_4$ DGKT-type vacua that the dual operators to the lightest scalars have integer dimensions. For the putative CFT${}_2$ dual theories of the AdS${}_3$ vacua we find no integer dimensions for the operators.

22 pages, 1 Figure

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• O6-plane backreaction on scale-separated Type IIA AdS${}_3$ vacua
• Non-integer conformal dimensions for type IIA flux vacua
• AdS scale separation and the distance conjecture
• Mass spectrum of type IIB flux compactifications -- comments on AdS vacua and conformal dimensions
• Negative scalar potentials and the swampland: an Anti-Trans-Planckian Censorship Conjecture
• Type IIB flux compactifications with $h^{1,1}=0$
• On Type IIA AdS${}_3$ solutions and massive GK geometries
• Smearing and Unsmearing KKLT AdS Vacua
• Exploring the landscape of (anti-) de Sitter and Minkowski solutions: group manifolds, stability and scale separation
• Metastable vacua from torsion and machine learning
• A domain wall bound on anti-de Sitter vacua