The universal profile conjecture for high-dimensional percolation

Let WW^* be the Brownian excursion of length 11, let Ψ(x)=Eexp[x01W(t)dt]\Psi(x)=\mathbb{E}\exp\left[x\int_0^1W^*(t)\,\mathrm dt\right] be the moment-generating function of its area, and define

F(x,s)=16x3s2x2+s22x,F(x,s)=\frac16x^3-\frac{s}{2}x^2+\frac{s^2}{2}x, dσs=12πx5/2Ψ(x3/2)eF(x,s)dx,fperc(s)=0x2dσs.\mathrm d\sigma_s=\frac{1}{\sqrt{2\pi}}x^{-5/2}\Psi(x^{3/2})e^{-F(x,s)}\,\mathrm dx,\qquad f_{\rm perc}(s)=\int_0^\infty x^2\,\mathrm d\sigma_s.

On Tr\mathbb{T}_r, let τpTr(0,x)=PpTr(0x)\tau_p^{\mathbb{T}_r}(0,x)=\mathbb{P}_p^{\mathbb{T}_r}(0\xleftrightarrow{}x) and χTr(p)=xTrτpTr(0,x)\chi^{\mathbb{T}_r}(p)=\sum_{x\in\mathbb{T}_r}\tau_p^{\mathbb{T}_r}(0,x); on Zd\mathbb{Z}^d, let τp\tau_p be the two-point function and pcp_c the critical value. Universal profile conjecture for percolation. For d>6d>6, with window scale wr=adrd/3w_r=a_dr^{-d/3} for suitably chosen ad>0a_d>0 and sRs\in\mathbb{R}, as rr\to\infty,

χTr(pc+swr)constdfperc(s)rd/3,\chi^{\mathbb{T}_r}(p_c+sw_r)\sim \operatorname{const}_d f_{\rm perc}(s)r^{d/3}, τpc+swrTr(0,x)τpc(0,x)constdfperc(s)r2d/3.\tau^{\mathbb{T}_r}_{p_c+sw_r}(0,x)-\tau_{p_c}(0,x)\sim \operatorname{const}_d f_{\rm perc}(s)r^{-2d/3}.

This predicts a universal finite-size scaling profile for susceptibility and the plateau-like correction to the two-point function in the high-dimensional percolation regime. The source gives no resolution evidence, so the conjecture remains open.

Sources & referencesView supporting material

Primary source

Yucheng Liu, Romain Panis and Gordon Slade, “The torus plateau for the high-dimensional Ising model”, arXiv:2405.17353 (2025).

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