Free energy topological expansion for the 2-matrix model

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Published 18 December 2006 Published under licence by IOP Publishing Ltd
, , Citation Leonid Chekhov et al JHEP12(2006)053 DOI 10.1088/1126-6708/2006/12/053

1126-6708/2006/12/053

Abstract

We compute the complete topological expansion of the formal hermitian two-matrix model. For this, we refine the previously formulated diagrammatic rules for computing the 1/N expansion of the nonmixed correlation functions and give a new formulation of the spectral curve. We extend these rules obtaining a closed formula for correlation functions in all orders of topological expansion. We then integrate it to obtain the free energy in terms of residues on the associated Riemann surface.

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