https://doi.org/10.1140/epjc/s10052-020-8247-5
Regular Article - Theoretical Physics
No-scale and scale-separated flux vacua from IIA on G2 orientifolds
1
Instituut voor Theoretische Fysica, K.U. Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium
2
Physics Division, National Technical University of Athens, Zografou Campus, 15780, Athens, Greece
* e-mail: fotisfgm@gmail.com
Received:
5
June
2020
Accepted:
13
July
2020
Published online:
22
July
2020
We discuss flux compactifications of IIA string theory on G2 holonomy spaces with O2/O6-planes to three dimensions and find two classes of solutions: (1) No-scale Minkowski vacua from NSNS 3-form fluxes and RR 4-form fluxes. (2) By adding Romans mass we find AdS
vacua for which the AdS scale can be decoupled completely from the KK scale while the solution is at tunable weak coupling and large volume. For the AdS vacuum we only have a proper 3D description (i.e. smeared orientifold description) of the solution like the 4D analogue of IIA moduli stabilization from fluxes and O6-planes. This 3D description reveals that moduli with non-compact moduli spaces can be stabilized at the classical level. For both types of vacua we can have supersymmetry or not.
© The Author(s), 2020
