Strong law of large numbers for loop lengths

Consider a random loop configuration in a box Λ\Lambda of side length LL, with loop lengths j(ω)\ell_j(\omega) ordered decreasingly. Let m(β)m(\beta) denote the limiting density of points belonging to long loops. Strong law conjecture. There exists m(β)m(\beta) such that, as LL\to\infty, for almost every realization ω\omega,

limKlimLj=1Kj(ω)Λ=m(β),\lim_{K\to\infty}\lim_{L\to\infty}\sum_{j=1}^{K}\frac{\ell_j(\omega)}{|\Lambda|}=m(\beta),

and

limklimLj:jkj(ω)Λ=1m(β).\lim_{k\to\infty}\lim_{L\to\infty}\sum_{j:\,\ell_j\leq k}\frac{\ell_j(\omega)}{|\Lambda|}=1-m(\beta).

Here m(β)m(\beta) is the mass of points in long loops: it is expected to vanish for small β\beta and become positive beyond the transition point. The conjecture asserts that the density in intermediate, mesoscopic loops vanishes; the supplied text gives no resolution.

Sources & referencesView supporting material

Primary source

Alessandro Barp, Edoardo Gabriele Barp, Francois-Xavier Briol and Daniel Ueltschi, “A numerical study of the 3D random interchange and random loop models”, arXiv:1505.00983 (2015).

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