T-Duality Invariant String Theory at the Quantum Level

T-Duality Invariant String Theory at the Quantum Level

Mon, 18/01/2010
12:00 		Daniel Thompson (Queen Mary, UL) String Theory Seminar Add to calendar L3
T-Duality Invariant String Theory at the Quantum Level
In this talk I will be discussing some reformulations of string theory which promote T-duality to the level of a manifest symmetry namely Hull's Doubled Formalism and Klimcik and Severa's  Poisson-Lie T-duality.   Such formalisms double the number of fields but also incorporate some chirality-like constraint. Invoking this constraint leads one to consider sigma-models which, though duality invariant, do not possess manifest Lorentz Invariance.   Whilst such formalisms make sense at a classical level their quantum validity is less obvious.  I address this issue by examining the renormalization of these duality invariant sigma models.  This talk is based upon both forthcoming work and recent work in arXiv:0910.1345 [hep-th] and its antecedents arXiv:0708.2267, arXiv:0712.1121.