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.A preprint version of the article is available at ArXiv.

中文翻译：

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G2方向上IIA的无标度和标度分离的通量真空

我们讨论了在具有O2 / O6平面的G2完整空间上将IIA弦理论的磁通紧化到三个维度，并找到了两类解决方案：（1）来自NSNS 3型通量和RR 4型通量的无标Minkowski真空。（2）通过添加罗马质量，我们发现AdS \（_ 3 \）真空度可以使AdS规模与KK规模完全脱钩，而解决方案处于可调的弱耦合和大体积下。对于AdS \（_ 3 \）真空，我们仅对该溶液有一个正确的3D描述（即模糊的定向描述），例如通量和O6平面的IIA模数稳定化的4D类似物。此3D描述显示，具有非紧凑模空间的模可以稳定在经典水平。对于这两种类型的真空，我们都可以具有或不具有超对称性。该文章的预印本可从ArXiv获得。