Recent work is reviewed in which compactifications of string and M theory are constructed in
which all scalar fields (moduli) are massive, and supersymmetry is broken with a small …

We present a pedagogical overview of flux compactifications in string theory, from the basic
ideas to the most recent developments. We concentrate on closed-string fluxes in type-II …

A geometric string solution has background fields in overlap** coordinate patches related
by diffeomorphisms and gauge transformations, while for a non-geometric background this …

A bstract Massive type IIA flux compactifications of the form AdS 4× X 6, where X 6 admits a
Calabi-Yau metric and O6-planes wrap** three-cycles, display families of vacua with …

We investigate a simple class of type-II string compactifications which incorporate
nongeometric``fluxes''in addition to``geometric flux''and the usual H-field and RR fluxes …

We analyse the most general supersymmetric solutions of D= 11 supergravity consisting of a
warped product of five-dimensional anti-de Sitter space with a six-dimensional Riemannian …

We discuss the action of O (d, d), and in particular T-duality, in the context of generalized
geometry, focusing on the description of so-called non-geometric backgrounds. We derive …

The N= 1 effective action for generic type IIA Calabi–Yau orientifolds in the presence of
background fluxes is computed from a Kaluza–Klein reduction. The Kähler potential, the …

We characterize Script N= 1 vacua of type-II theories in terms of generalized complex
structure on the internal manifold M. The structure group of T (M)⊕ T*(M) being SU (3)× SU …

We show that the supersymmetry transformations for type II string theories on six-manifolds
can be written as differential conditions on a pair of pure spinors, the exponentiated Kähler …