Double field theory (DFT) is a proposal to incorporate T-duality, a distinctive symmetry of
string theory, as a symmetry of a field theory defined on a double configuration space. The …

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 …

The geometric Langlands program can be described in a natural way by compactifying on a
Riemann surface C a twisted version of N= 4 super Yang-Mills theory in four dimensions …

A bstract In M-theory, the only AdS 7 supersymmetric solutions are AdS 7× S 4 and its
orbifolds. In this paper, we find and classify new supersymmetric solutions of the type AdS …

A bstract We reformulate ten-dimensional type II supergravity as a generalised geometrical
analogue of Einstein gravity, defined by an O (9, 1)× O (1, 9)⊂ O (10, 10)×\({\mathbb …

Generalised geometry studies structures on a d-dimensional manifold with a metric and 2-
form gauge field on which there is a natural action of the group SO (d, d). This is generalised …

This review provides an introduction to non-geometric backgrounds in string theory. Starting
from a discussion of T-duality, geometric and non-geometric torus-fibrations are reviewed …

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 …

A bstract Double Field Theory describes the NS-NS sector of string theory and lives on a
doubled spacetime. The theory has a local gauge symmetry generated by a generalization …

A bstract In this work we study ten-dimensional solutions to type IIA string theory of the form
AdS 4× X 6 which contain orientifold planes and preserve\(\mathcal {N}\)= 1 supersymmetry …