Warped G₂-throats in IIA and uplift dSillusions

Flux compactifications of IIA supergravity on orientifolded G₂ G 2 -manifolds have been argued to allow for classical Minkowski₃ Minkowski 3 vacua with moduli and scale-separated AdS₃ AdS 3 vacua with full moduli stabilisation. To further uplift these vacua to meta-stable dS₃ dS 3 vacua using anti-D2 branes, warped throats are desirable. We study the flux-stabilisation of local “CGLP-type” throats in compact G₂ G 2 spaces, and discuss consistency constraints on anti-brane uplifting. Despite the classical AdS₃ AdS 3 vacua being free of tachyons, we find that uplifting from anti-branes down warped throats is forbidden. If instead we rely on hypothetical AdS₃ AdS 3 vacua that arise from quantum corrections to the classical Minkowski₃ Minkowski 3 vacua, we find that (similarly to the 4d analogues) consistency constraints point in opposite directions. However, there is potentially an advantage over 4d when it comes to concrete fine-tuning freedom of numbers, such as tadpole constraints.