Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-07-06
Mod.Phys.Lett. A10 (1995) 695-708
Physics
High Energy Physics
High Energy Physics - Theory
KL-TH-94/16 (a misspelled name is corrected)
Scientific paper
10.1142/S0217732395000740
We consider a two matrix model with gaussian interaction involving the term $tr ABAB$, which is quartic in angular variables. It describes a vertex model (in particular case - of F-model type) on the lattice of fluctuating geometry and is the simplest representative of the class of matrix models describing coupling to two-dimensional gravity of general vertex models. This class includes most of physically interesting matrix models, such as lattice gauge theories and matrix models describing extrinsic curvature strings. We show that the system of loop (Schwinger-Dyson) equations of the model decouples in the planar limit and allows one to find closed equations for arbitrary correlators, including the ones involving angular variables. This provides a solution of the model in the planar limit. We write down the equations for the two-point function and the eigenvalue density and sketch the calculation of perturbative corrections to the free case.
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