One-cut solution of the $β$-ensembles in the Zhukovsky variable

Details One-cut solution of the $β$-ensembles in the Zhukovsky variable One-cut solution of the $β$-ensembles in the Zhukovsky variable

2011-05-02

arxiv.org/abs/1105.0453v2

Physics

Mathematical Physics

27 pages, 2 figures. Version 2: published version in JStat. Typos fixed. Some parts have been slighly modified as suggested by

Scientific paper

In this article, we study in detail the modified topological recursion of the one matrix model for arbitrary $\beta$ in the one cut case. We show that for polynomial potentials, the recursion can be computed as a sum of residues. However the main difference with the hermitian matrix model is that the residues cannot be set at the branchpoints of the spectral curve but require the knowledge of the whole curve. In order to establish non-ambiguous formulas, we place ourselves in the context of the globalizing parametrization which is specific to the one cut case (also known as Zhukovsky parametrization). This situation is particularly interesting for applications since in most cases the potentials of the matrix models only have one cut in string theory. Finally, the article exhibits some numeric simulations of histograms of limiting density of eigenvalues for different values of the parameter $\beta$.

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