Green-Schwarz Superstrings on AdS_3 and the Boundary N=4 Superconformal Algebra

Physics – High Energy Physics – High Energy Physics - Theory

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14 pages, latex

Scientific paper

10.1142/S0217732399002467

We study the hybrid formulation of Green-Schwarz superstrings on AdS_3 with NS flux and the boundary N=4 superconformal algebra. We show the equivalence between the NSR and GS superstrings by a field redefinition. The boundary N=4 superconformal algebra is realized by the free fields of the affine Lie superalgebra A(1|1)^{(1)}. We also consider the light-cone gauge and obtain the N=4 super-Liouville theory which describes the effective theory of the single long string near the singularities of the D1-D5 system.

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