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arXiv · 2005.05246

No-scale and scale-separated flux vacua from IIA on G2 orientifolds

Fotis Farakos·George Tringas·Thomas Van Riet
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Abstract

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$_3$ 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$_3$ 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.

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Fotis Farakos, George Tringas, Thomas Van Riet. 2020-06-10. No-scale and scale-separated flux vacua from IIA on G2 orientifolds. https://doi.org/10.1140/epjc%2Fs10052-020-8247-5

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