Partition functions and the continuum limit in Penner matrix models



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Álvarez Galindo, Gabriel and Martínez Alonso, Luis and Medina, helena (2014) Partition functions and the continuum limit in Penner matrix models. Journal of physics A: Mathematical and Theoretical, 47 (31). ISSN 1751-8113

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We present an implementation of the method of orthogonal polynomials which is particularly suitable to study the partition functions of Penner random matrix models, to obtain their explicit forms in the exactly solvable cases, and to determine the coefficients of their perturbative expansions in the continuum limit. The method relies on identities satisfied by the resolvent of the Jacobi matrix in the three-term recursion relation of the associated families of orthogonal polynomials. These identities lead to a convenient formulation of the string equations. As an application, we show that in the continuum limit the free energy of certain exactly solvable models like the linear and double Penner models can be written as a sum of Gaussian contributions plus linear terms. To illustrate the one-cut case we discuss the linear, double and cubic Penner models, and for the two- cut case we discuss theoretically and numerically the existence of a double-branch structure of the free energy for the Gaussian Penner model.

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©IOP Publishing Ltd.
The financial support of the Ministerio de Ciencia e Innovación under project IS2011-22566 is gratefully acknowledged

Uncontrolled Keywords:Moduli Space; Combinatorics; Asymptotics; Equations; Behavior; Gravity
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:33892
Deposited On:04 Nov 2015 15:43
Last Modified:10 Dec 2018 15:09

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