Gamma-function singularity conjecture for beta-ensemble free energies

Let Vd+1(x)V_{d+1}(x) be any potential of degree d+1d+1, and let ϵ~i{\widetilde{\epsilon}}_i be the occupation numbers on the cycles A~i{\widetilde{{\cal A}}}_i, for i=1,,di=1,\ldots,d. Here [logΓ](x)[\int\log\Gamma](x) denotes an antiderivative of logΓ(x)\log\Gamma(x). Gamma-function singularity conjecture. The singular part of F0{\mathcal F}_0 has the form

singF0=2i=1d12[logΓ](ϵ~i/).\operatorname{sing}{\mathcal F}_0=\hbar^2\sum_{i=1}^d\frac{1}{2}[\int\log\Gamma]({\widetilde{\epsilon}}_i/\hbar).

This conjecture proposes a universal description of the singular part of the genus-zero free energy in terms of the occupation numbers of the cycles. The preceding analysis derives the corresponding one-cycle behavior and matches the expected large-positive-argument Gaussian matrix-model asymptotics, but the general statement is not resolved here.

Sources & referencesView supporting material

Primary source

L. O. Chekhov, B. Eynard and O. Marchal, “Topological expansion of beta-ensemble model and quantum algebraic geometry in the sectorwise approach”, arXiv:1009.6007 (2010).

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