On dS vacua in string theory
Jakob Moritz · DESY (CERN, DESY, Fermilab, IHEP, and SLAC) · 2018
Using a 10D lift of non-perturbative volume stabilization in type IIB string theory we find that the simplest KKLT vacua cannot be uplifted to de Sitter space upon inclusion of SUSY breaking sources like warped anti-branes. We interpret this result in terms of a 'flattening' of the potential due to stronger back-reaction on the volume modulus than has previously been anticipated. Hence, the supersymmetry breaking vacua constructed in such a way can at most feature four dimensional Anti-de Sitter space. We comment on potential ways to circumvent this issue in setups such as racetrack stabilization both from the perspective of four dimensional effective field theory as well as from the ten dimensional perspective.