Pohlmeyer-reduced form of string theory in AdS_5 x S^5: semiclassical expansion

Details Pohlmeyer-reduced form of string theory in AdS_5 x S^5: semiclassical expansion Pohlmeyer-reduced form of string theory in AdS_5 x S^5: semiclassical expansion

2009-06-20

arxiv.org/abs/0906.3800v2

J.Phys.A42:375204,2009

Physics

High Energy Physics

High Energy Physics - Theory

44 pages. v2: references added

Scientific paper

10.1088/1751-8113/42/37/375204

We consider the Pohlmeyer-reduced formulation of the AdS_5 x S^5 superstring. It is constructed by introducing new variables which are algebraically related to supercoset current components so that the Virasoro conditions are automatically solved. The reduced theory is a gauged WZW model supplemented with an integrable potential and fermionic terms that ensure its UV finiteness. The original superstring theory and its reduced counterpart are closely related at the classical level, and we conjecture that they remain related at the quantum level as well, in the sense that their quantum partition functions evaluated on respective classical solutions are equal. We provide evidence for the validity of this conjecture at the one-loop level, i.e. at the first non-trivial order of the semiclassical expansion near several classes of classical solutions.

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