Toroidal Orientifolds in IIA with General NS-NS Fluxes

Details Toroidal Orientifolds in IIA with General NS-NS Fluxes Toroidal Orientifolds in IIA with General NS-NS Fluxes

2007-05-23

arxiv.org/abs/0705.3410v2

JHEP 0708:043,2007

Physics

High Energy Physics

High Energy Physics - Theory

59 pages, references added

Scientific paper

10.1088/1126-6708/2007/08/043

Type IIA toroidal orientifolds offer a promising toolkit for model builders, especially when one includes not only the usual fluxes from NS-NS and R-R field strengths, but also fluxes that are T-dual to the NS-NS three-form flux. These new ingredients are known as metric fluxes and non-geometric fluxes, and can help stabilize moduli or can lead to other new features. In this paper we study two approaches to these constructions, by effective field theory or by toroidal fibers twisted over a toroidal base. Each approach leads us to important observations, in particular the presence of D-terms in the four-dimensional effective potential in some cases, and a more subtle treatment of the quantization of the general NS-NS fluxes. Though our methods are general, we illustrate each approach on the example of an orientifold of T^6/Z_4.

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