Speaker
Description
I will present a worldsheet formulation of string theory in the background of a single decoupled NS5-brane, which is a particularly simple example of ``little string'' holography. The worldsheet theory involves a gauged Wess-Zumino-Witten model for the group coset G/H, where G=PSU(1,1|2)×R^{5,1} and H=U(1)×U(1). A variant of the embedding of H into G describes a background that interpolates between the fivebrane throat in the UV and AdS3 in the IR, which is dual to the (single trace) TTbar-deformed symmetric product orbifold. Well-known difficulties with a worldsheet theory for n_5=1 fivebranes are bypassed by the incorporation of an extra constraint on the dynamics. Along the way, we construct a map between the supergroup formulation of the n_5=1 worldsheet theory and the more conventional RNS worldsheet formalism.
