BIonic membranes and AdS instabilities

A bstract We study 4d membranes in type IIA flux compactifications of the form AdS 4 × X 6 , where admits a Calabi-Yau metric. These models feature scale separation and D6-branes/O6-planes on three-cycles . When latter are treated as localised sources, explicit solutions to 10d equations motion Bianchi identities known $$ \mathcal{N} N = 1 settings, valid at first order an expansion parameter related cosmological constant. extend such family perturbatively stable 0 vacua, analyse their non-perturbative stability by looking membranes. Up accuracy solution, we find that either D4-branes or anti-D4-branes holomorphic curves feel no force both Differently, D8-branes wrapping with D6-branes ending them can be superextremal attracted towards boundary. The sources imbalance curvature D8/D6 BIon profile, comparable terms checked for (blown-up) toroidal orbifold. then show simple vacua space-time filling unstable against bubble nucleation, decaying less larger Romans mass.