Backreacted T-folds and non-geometric regions in configuration space

ar X iv : 0 80 8 . 13 45 v 1 [ he p - th ] 1 1 A ug 2 00 8 Backreacted T - folds and Non - geometric regions in configuration space

We provide the backreaction of the T-fold doubly T-dual to a background with NSNS three-form flux on a three-torus. We extend the backreacted T-fold to include cases with a flux localized in one out of three directions. We analyze the resulting monodromy domain walls and vortices. In these backgrounds, we give an analysis of the action of T-duality on observables like charges and Wilson surface...

Symmetries in Non Commutative Configuration Space. *

Extending earlier work [7], we examine the deformation of the canonical symplectic structure in a cotangent bundle T ⋆ (Q) by additional terms implying the Poisson non-commutativity of both configuration and momentum variables. In this short note, we claim this can be done consistently when Q is a Lie group.

Vestibular folds configuration in vocal nodule Summary

Generalised T-Duality and Non-Geometric Backgrounds

We undertake a systematic analysis of non-geometric backgrounds in string theory by seeking stringy liftings of a class of gauged supergravity theories. In addition to conventional flux compactifications and non-geometric T-folds with T-duality transition functions, we find a new class of non-geometric backgrounds with non-trivial dependence on the dual coordinates that are conjugate to the str...

Doubled Geometry and T-Folds

The doubled formulation of string theory, which is T-duality covariant and enlarges spacetime with extra coordinates conjugate to winding number, is reformulated and its geometric and topological features examined. It is used to formulate string theory in T-fold backgrounds with T-duality transition functions and a quantum implementation of the constraints of the doubled formalism is presented....