Semiclassical strings and AdS/CFT

Details Semiclassical strings and AdS/CFT Semiclassical strings and AdS/CFT

2004-09-29

arxiv.org/abs/hep-th/0409296v1

Physics

High Energy Physics

High Energy Physics - Theory

34 pages. Contribution to Proceedings of Cargese Summer School, June 7-19, 2004, extended version of hep-th/0407218

Scientific paper

We discuss AdS/CFT duality in the sector of ``semiclassical'' string states with large quantum numbers. We review the coherent-state effective action approach, in which similar 2d sigma model actions appear from the AdS_5 x S^5 string action and from the integrable spin chain Hamiltonian representing the N=4 super Yang-Mills dilatation operator. We consider mostly the leading-order terms in the energies/anomalous dimensions which match but comment also on higher-order corrections.

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