Supersymmetric scale-separated vacua in type IIB

Authors: Vincent Van Hemelryck

Pre-print: UUITP-04/25

Abstract: I construct supersymmetric AdS3 vacua of type IIB string theory that exhibit parametric scale separation in the controlled regime. These solutions arise from compactifications on seven-dimensional manifolds equipped with co-closed G2-structures, in the presence of orientifold planes preserving minimal supersymmetry. I focus on ℤ32 orbifolds of a specific solvmanifold and all seven-dimensional nilmanifolds, each requiring distinct configurations of intersecting O5-planes, which are treated in the smeared approximation. Weak string coupling, large volumes and scale separation for the classical backgrounds on the nilmanifolds are achieved by tuning unbounded fluxes to large values. Furthermore, for some solutions, the holographic field theory operators dual to the lightest scalar fields have integer conformal dimensions at tree level, as in other scale-separated type II orientifold backgrounds.