Warped G2-throats in IIA and uplift dSillusions
Abstract
Flux compactifications of IIA supergravity on orientifolded G2-manifolds have been argued to allow for classical Minkowski3 vacua with moduli and scale-separated AdS3 vacua with full moduli stabilisation. To further uplift these vacua to meta-stable dS3 vacua using anti-D2 branes, warped throats are desirable. We study the flux-stabilisation of local "CGLP-type" throats in compact G2 spaces, and discuss consistency constraints on anti-brane uplifting. Despite the classical AdS3 vacua to be free of tachyons, we find that uplifting from anti-branes down warped throats is forbidden. If instead we rely on hypothetical AdS3 vacua that arise from quantum corrections to the classical Minkowski3 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.
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