Abelian Varieties, RCFTs, Attractors, and Hitchin Functional in Two Dimensions

Details Abelian Varieties, RCFTs, Attractors, and Hitchin Functional in Two Dimensions Abelian Varieties, RCFTs, Attractors, and Hitchin Functional in Two Dimensions

2006-04-25

arxiv.org/abs/hep-th/0604176v1

Physics

High Energy Physics

High Energy Physics - Theory

54 pages, harvmac

Scientific paper

We consider a generating function for the number of conformal blocks in rational conformal field theories with an even central charge c on a genus g Riemann surface. It defines an entropy functional on the moduli space of conformal field theories and is captured by the gauged WZW model whose target space is an abelian variety. We study a special coupling of this theory to two-dimensional gravity. When c=2g, the coupling is non-trivial due to the gravitational instantons, and the action of the theory can be interpreted as a two-dimensional analog of the Hitchin functional for Calabi-Yau manifolds. This gives rise to the effective action on the moduli space of Riemann surfaces, whose critical points are attractive and correspond to Jacobian varieties admitting complex multiplication. The theory that we describe can be viewed as a dimensional reduction of topological M-theory.

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