Abstract
We describe how unbounded three-form fluxes can lead to families of AdS3×S7 vacua, with constant dilaton profiles, in the USp(32) model with “brane supersymmetry breaking” and in the U(32) 0'B model, if their (projective-)disk dilaton tadpoles are taken into account. We also describe how, in the SO(16)×SO(16) heterotic model, if the torus vacuum energy Λ is taken into account, unbounded seven-form fluxes can support similar AdS7×S3 vacua, while unbounded three-form fluxes, when combined with internal gauge fields, can support AdS3×S7 vacua, which continue to be available even if Λ is neglected. In addition, special gauge field fluxes can support, in the SO(16)×SO(16) heterotic model, a set of AdSn×S10−n vacua, for all n=2,..,8. String loop and α′ corrections appear under control when large form fluxes are allowed.
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