Speaker
Description
We consider massive type IIA Supergravity compactified down to
4 dimensions on twisted tori or down to 7 dimensions on a 3-sphere, in
presence of D6 branes and O6 planes. Both these instances admit a gauged
Supergravity description, with a quadratic potential in the embedding
tensor components. The dynamics of open strings is taken into account by
adding extra vector multiplets and embedding tensor components. The
scalar potential gets new terms that in 4 dimensions can be matched with
contributions coming from dimensional reduction of the non-Abelian DBI
and WZ brane actions. The uplift of 7-dimensional solutions to 10
dimensions is instead analyzed at the level of equations of motion,
since no consistent truncation from massive type IIA down to 7
dimensions is known with an arbitrary number of vector multiplets. Novel
AdS4 and AdS7 vacua are determined, both supersymmetric and
non-supersymmetric. Their perturbative stability has been addressed by
computing their mass spectra. Some of the vacua are found to be
perturbatively stable, despite their being non -supersymmetric.
