Abstract: Obtaining string compactifications where the KK scale is much higher than the cosmological constant scale is quite challenging. Such a separation of scales is however necessary for the theory to be genuinely lower-dimensional. In massive type IIA string theory there are such scale-separated vacua, e.g. the DGKT AdS4 solutions. It has been shown recently that the classical orientifold backreaction in these vacua can be tuned small. In this talk, I show that massless IIA on the other hand allows both weakly and strongly coupled AdS4 vacua that exhibit scale separation and for which the backreaction can be tuned small as well. I will give evidence that the strongly coupled solutions can be lifted to scale separated and sourceless (but classically singular) geometries in 11D supergravity.
Link: https://tuwien.zoom.us/j/97851308475
AnLy: https://sites.google.com/view/anlystringsandfields
