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arXiv · hep-th/0306053

Superstrings on NS5 backgrounds, deformed AdS3 and holography

Dan Israel·Costas Kounnas·Marios P Petropoulos
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Abstract

We study a non-standard decoupling limit of the D1/D5-brane system, which interpolates between the near-horizon geometry of the D1/D5 background and the near-horizon limit of the pure D5-brane geometry. The S-dual description of this background is actually an exactly solvable two-dimensional (worldsheet) conformal field theory: {null-deformed SL(2,R)} x SU(2) x T^4 or K3. This model is free of strong-coupling singularities. By a careful treatment of the SL(2,R), based on the better-understood SL(2,R) / U(1) coset, we obtain the full partition function for superstrings on SL(2,R) x SU(2) x K3. This allows us to compute the partition functions for the J^3 and J^2 current-current deformations, as well as the full line of supersymmetric null deformations, which links the SL(2,R) conformal field theory with linear dilaton theory. The holographic interpretation of this setup is a renormalization-group flow between the decoupled NS5-brane world-volume theory in the ultraviolet (Little String Theory), and the low-energy dynamics of super Yang--Mills string-like instantons in six dimensions.

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Dan Israel, Costas Kounnas, Marios P Petropoulos. 2003-10-14. Superstrings on NS5 backgrounds, deformed AdS3 and holography. https://doi.org/10.1088/1126-6708%2F2003%2F10%2F028

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