On the Large N Limit of 3D and 4D Hermitian Matrix Models

Details On the Large N Limit of 3D and 4D Hermitian Matrix Models On the Large N Limit of 3D and 4D Hermitian Matrix Models

1995-04-04

arxiv.org/abs/hep-th/9504013v2

Nucl.Phys. B450 (1995) 713-729

Physics

High Energy Physics

High Energy Physics - Theory

Number 0.519689 in eqs (36) and (37) should be replaced by 0.303152. The critical exponents were computed with the correct num

Scientific paper

10.1016/0550-3213(95)00382-3

The large N limit of the hermitian matrix model in three and four Euclidean space-time dimensions is studied with the help of the approximate Renormalization Group recursion formula. The planar graphs contributing to wave function, mass and coupling constant renormalization are identified and summed in this approximation. In four dimensions the model fails to have an interacting continuum limit, but in three dimensions there is a non trivial fixed point for the approximate RG relations. The critical exponents of the three dimensional model at this fixed point are $\nu = 0.665069$ and $\eta=0.19882$. The existence (or non existence) of the fixed point and the critical exponents display a fairly high degree of universality since they do not seem to depend on the specific (non universal) assumptions made in the approximation.

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