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arXiv · 2204.11892

Membranes in AdS4 orientifold vacua and their Weak Gravity Conjecture

Gonzalo F. Casas·Fernando Marchesano·David Prieto
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Abstract

We study type IIA orientifold compactifications with fluxes that give rise to perturbatively stable, non-supersymmetric AdS$_4$ vacua with D6-brane gauge sectors. Non-perturbative instabilities can be mediated by D8-branes wrapped on the six internal dimensions $X_6$, if they reduce to 4d membranes with a charge $Q$ larger than its tension $T$. The mismatch $Q \neq T$ arises due to i) curvature corrections and ii) the BIon backreaction of D6-branes wrapping 3-cycles of $X_6$. We give a simple expression for the second effect in toroidal orientifolds, and find that only pairs of 3-cycles at SU(2) angles contribute to it. They either contribute towards $Q>T$ or $Q<T$ depending on the 3-cycles separation, allowing to engineer 4d $\mathcal{N}=0$ vacua in tension with the Weak Gravity Conjecture for membranes.

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Gonzalo F. Casas, Fernando Marchesano, David Prieto. 2022-04-25. Membranes in AdS4 orientifold vacua and their Weak Gravity Conjecture. https://doi.org/10.1007/jhep09(2022)034

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