Abstract
In this paper we derive analytic characterizations for and explicit evaluations of the coefficients of the matrix integral genus expansion. The expansion itself arises from the large N asymptotic expansion of the logarithm of the partition function of N × N Hermitian random matrices. Its g th coefficient is a generating function for graphical enumeration on Riemann surfaces of genus g. The case that we particularly consider is for an underlying measure that differs from the Gaussian weight by a single monomial term of degree 2ν. Our results are based on a hierarchy of recursively solvable differential equations, derived through a novel continuum limit, whose solutions are the coefficients we want to characterize. These equations are interesting in their own right in that their form is related to partitions of 2g + 1 and joint probability distributions for conditioned random walks.
Original language | English (US) |
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Pages (from-to) | 31-81 |
Number of pages | 51 |
Journal | Communications in Mathematical Physics |
Volume | 278 |
Issue number | 1 |
DOIs | |
State | Published - Feb 2008 |
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Mathematical Physics