Giuseppe D'Appollonio 2004 Class. Quantum Grav. 21 S1329 doi:10.1088/0264-9381/21/10/006
Giuseppe D'Appollonio
Show affiliationsA 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 the 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) × SU(2)k WZW model, an approach that could prove useful in order to understand holography for pp-wave spacetimes. We will finally comment on the string amplitudes and on the existence of two flat space limits.
11.25.Hf Conformal field theory, algebraic structures
81T40 Two-dimensional field theories, conformal field theories, etc.
Issue 10 (21 May 2004)
Received 25 February 2004
Published 16 April 2004
Giuseppe D'Appollonio 2004 Class. Quantum Grav. 21 S1329
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