The GUE corners limit conjecture in the diverging-temperature regime

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Let Assumption (function)\mathrm{(function)} hold, and set q=q(N)=e−γ(N)/Nq=q(N)=e^{-\gamma(N)/N}, where γ(N)→+∞\gamma(N)\to+\infty and γ(N)≪N\gamma(N)\ll N. Let λjr(N)\lambda^r_j(N) denote the parts of the random lozenge-tiling signatures, and let KK be fixed. The condition f′(1)<0\mathsf{f}'(1)<0 concerns the slope of the weakly decreasing function f\mathsf{f} at the left end of the top row. GUE corners limit conjecture. If f′(1)<0\mathsf{f}'(1)<0, then an analogue of the main GUE-corners limit theorem holds under a suitable normalization determined by u(N)\mathsf{u}(N) and \upsigma2(N)\upsigma^2(N), with

lim⁡N→∞u(N)=lim⁡N→∞\upsigma2(N)=0,\lim_{N\to\infty}\mathsf{u}(N)=\lim_{N\to\infty}\upsigma^2(N)=0,

and

{λjr(N)−u(N)N\upsigma(N)N:1≤r≤K, 1≤j≤r}→{Ljr:1≤r≤K, 1≤j≤r}∼GUEK×K(1).\left\{\frac{\lambda^r_j(N)-\mathsf{u}(N)N}{\upsigma(N)\sqrt{N}}:1\le r\le K,\ 1\le j\le r\right\}\to\left\{\mathsf{L}^r_j:1\le r\le K,\ 1\le j\le r\right\}\sim\mathsf{GUE}_{K\times K}(1).

The conjecture concerns fluctuations at a scale smaller than N\sqrt{N} when the parameter qq approaches 11 with γ(N)→∞\gamma(N)\to\infty and γ(N)≪N\gamma(N)\ll N. The supplied text does not state whether this analogue has been proved, so its status remains open.

References

Primary source

Sevak Mkrtchyan and Leonid Petrov, “GUE corners limit of q-distributed lozenge tilings”, arXiv:1703.07503 (2017).

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