Gravitational waves from WZW models

Details Gravitational waves from WZW models Gravitational waves from WZW models

2003-12-17

arxiv.org/abs/hep-th/0312206v1

Class.Quant.Grav. 21 (2004) S1329-1336

Physics

High Energy Physics

High Energy Physics - Theory

Contribution to the proceedings of the RTN-workshop ``The quantum structure of space-time and the geometrical nature of the fu

Scientific paper

10.1088/0264-9381/21/10/006

A brief review is given of the recent solution of a non-compact CFT describing a NS-supported pp-wave background. We will first explain how to compute the three and four-point correlators using current algebra techniques, thereby showing that some generic features of the non-compact WZW models become very clear in this simple context. We will then present the Penrose limit as a contraction of an U(1)xSU(2)_k WZW model, an approach that could prove useful in order to understand holography for pp-wave space-times. We will finally comment on the string amplitudes and on the existence of two flat space limits.

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