(Super-) String in Two Dimensional Black Hole and Target Space Dualities
Abstract
We review the recently proposed string theory in two dimensional black hole background. Especially, the structure of the duality in the target space is discussed. The duality is analogous to R → 1/R" symmetry of a compactified boson. We consider the duality in more general target space manifolds which have Killing symmetries and we give an explicit formula which connects two different manifolds which are dual to each other. Superstring theory in two dimensional black hole background is also discussed based on supersymmetric SU(1,1)/U(1) gauged Wess-Zumino-Witten model.
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