Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-05-15
JHEP0707:080,2007
Physics
High Energy Physics
High Energy Physics - Theory
35 pages. Minor corrections
Scientific paper
10.1088/1126-6708/2007/07/080
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. This establishes the quantum equivalence to the usual sigma-model formalism for world-sheets of arbitrary genus, provided a topological term is added to the action. The quantisation involves a local choice of polarisation, but the results are independent of this. The natural dilaton of the doubled formalism is duality-invariant and so T-duality is a perturbative symmetry for the perturbation theory in the corresponding coupling constant. It is shown how this dilaton is related to the dilaton of the conventional sigma-model which does transform under T-duality. The generalisation of the doubled formalism to the superstring is given and shown to be equivalent to the usual formulation. Finally, the formalism is generalised to one in which the whole spacetime is doubled.
No associations
LandOfFree
Doubled Geometry and T-Folds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Doubled Geometry and T-Folds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Doubled Geometry and T-Folds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-622132