Renormalization group flow in one- and two-matrix models

Details Renormalization group flow in one- and two-matrix models Renormalization group flow in one- and two-matrix models

1994-09-02

arxiv.org/abs/hep-th/9409009v3

Nucl.Phys. B434 (1995) 283-318; Erratum-ibid. B441 (1995) 405

Physics

High Energy Physics

High Energy Physics - Theory

34 pages in LaTeX, 4 eps figures included in uufiled form, with a few minor but helpful corrections

Scientific paper

Large-$N$ renormalization group equations for one- and two-matrix models are derived. The exact renormalization group equation involving infinitely many induced interactions can be rewritten in a form that has a finite number of coupling constants by taking account of reparametrization identities. Despite the nonlinearity of the equation, the location of fixed points and the scaling exponents can be extracted from the equation. They agree with the spectrum of relevant operators in the exact solution. A linearized $\beta$-function approximates well the global phase structure which includes several nontrivial fixed points. The global renormalization group flow suggests a kind of $c$-theorem in two-dimensional quantum gravity.

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