Speaker
Vincent van Hemelryck
(Uppsala University)
Description
Whether flux compactifications can feature scale separation, i.e. whether the Kaluza-Klein length scale is much smaller than the cosmological scale, is still debated in the string community. In this talk, I will provide evidence for the existence of supersymmetric and scale-separated AdS4 vacua in M-theory of the Freund-Rubin type. The internal space has weak G2-holonomy, which is obtained from the lift of AdS vacua in massless type IIA on a specific SU(3)-structure with O6-planes. Such lifts require a local treatment of the O6-planes, therefore going beyond the usual smeared approximation. I will show how this can be achieved while preserving supersymmetry manifestly, extending on previous work.
