The conjecture on the maximum of the GFF on the circle

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Let VNV_N be the maximum of the discretized Gaussian free field on the circle with singularity parameter α≥0\alpha\geq 0. Let M(τ=1,α,α)M_{(\tau=1,\alpha,\alpha)} denote the critical Morris integral distribution, and let X,Y,Y′X,Y,Y' be the Barnes beta variables defined in the conjecture. Maximum of the GFF on the circle. As N→∞N\to\infty,

E[eqVN]≈eq(2log⁡N−(3/2)log⁡log⁡N+const⁡)E[M(τ=1,α,α)q],\mathbf{E}[e^{qV_N}]\approx e^{q(2\log N-(3/2)\log\log N+\operatorname{const})}\mathbf{E}[M_{(\tau=1,\alpha,\alpha)}^q],

and VNV_N has the stated decomposition into the deterministic centering, log⁡X+log⁡Y+log⁡Y′+o(1)\log X+\log Y+\log Y'+o(1). When α=0\alpha=0, the log⁡X\log X term is absent and YY and Y′Y' have the same law. The claim extends the conjecture of Fyodorov and Bouchaud from α=0\alpha=0 to general α\alpha; no resolution is supplied.

References

Primary source

Dmitry Ostrovsky, “On Barnes Beta Distributions and Applications to the Maximum Distribution of the 2D Gaussian Free Field”, arXiv:1605.01589 (2016).

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