G2 resolutions and backtracking in scale-separated AdS$_3$

Abstract: We study scale-separated AdS$_3$ models with full moduli stabilization in massive IIA supergravity on G2 orientifolds. In addition to constructing new examples, we investigate the properties of these models once the singularities of the G2 toroidal orbifold are resolved. The blow-up moduli are shown to be stabilized using fluxes in a parametric regime that preserves scale separation and control under the supergravity approximation. We further show that the apparent orientifold intersections in the singular orbifold description do not exist on such resolved spaces. Finally, we analyze the brane dual picture of such models using flux backtracking. We highlight several interesting features from such analysis such as a finite interval solution of the resulting flow equations in some of the models and the desirable low-energy decoupling of brane modes.