Strong Mabuchi energy expansion conjecture for beta-ensembles on the Riemann sphere

Let ϕ\phi be a function on C\mathbb{C} with logarithmic growth and finite relative entropy Dμ0(μϕ)D_{\mu_0}(\mu_{\phi}), where μ0:=e2ψ0/π\mu_0:=e^{-2\psi_0}/\pi is the standard probability measure on the Riemann sphere P1\mathbb{P}^1. Set p:=2/β1p:=2/\beta-1, and let D(N)D^{(N)}, λ\lambda, F\mathcal{F}, M\mathcal{M}, and ξβ\xi_\beta have the meanings used in the source.

Strong beta-ensemble expansion conjecture.

1N(N+p)βlogCN(D(N)2e(N+p)ϕ)βdλN=F(ϕ)+logN2N1N1((1β12)M(Pϕ)ξβ)+o(1).\frac{1}{N(N+p)\beta}\log\int_{\mathbb{C}^{N}}\left(|D^{(N)}|^{2}e^{-(N+p)\phi}\right)^{\beta}d\lambda^{\otimes N}=-\mathcal{F}(\phi)+\frac{\log N}{2}N^{-1}-N^{-1}\left(\left(\frac{1}{\beta}-\frac{1}{2}\right)\mathcal{M}(P\phi)-\xi_{\beta}\right)+o(1).

This is presented as the strongest-form conjecture for beta-ensembles on the Riemann sphere, with Mabuchi's K-energy functional for O(1)P1\mathcal{O}(1)\rightarrow\mathbb{P}^1 appearing in the next-order term.

Sources & referencesView supporting material

Primary source

Robert J. Berman, “Sharp deviation inequalities for the 2D Coulomb gas and Quantum hall states, I”, arXiv:1906.08529 (2019).

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