Topological Superstring in D = 2 and Topological Supergravity

Abstract
We examined the quantization of a topological sigma model in 2D superspace with a 2D flat target manifold. It is shown that the topological supergravity is obtained as the quantum theory by taking the superdiffeomorphism invariance into account. We also discuss the global (twisted) supersymmetries realized in the quantum theory.

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