Finite and macroscopic loop decomposition conjecture

Let (Λ,E)(\Lambda,\mathcal E) be a finite periodic box, let β>0\beta>0, and let L1(ω),L2(ω),L_1(\omega),L_2(\omega),\ldots be the loop lengths in decreasing order. The normalized loop lengths are Li(ω)/(βΛ)L_i(\omega)/(\beta|\Lambda|). Finite and macroscopic loop decomposition conjecture. There exists ν[0,1]\nu\in[0,1] such that

limKlimΛi:Li(ω)<KLi(ω)βΛ=1ν\lim_{K\to\infty}\lim_{|\Lambda|\to\infty}\sum_{i:L_i(\omega)<K}\frac{L_i(\omega)}{\beta|\Lambda|}=1-\nu

and

limklimΛi=1kLi(ω)βΛ=ν.\lim_{k\to\infty}\lim_{|\Lambda|\to\infty}\sum_{i=1}^{k}\frac{L_i(\omega)}{\beta|\Lambda|}=\nu.

Thus only finite and macroscopic loops contribute in the thermodynamic limit. The conjecture is known with ν=0\nu=0 in dimensions d=1,2d=1,2 and at high temperature in d3d\geq3; it is expected that ν>0\nu>0 for sufficiently low temperature in dimensions d3d\geq3.

Sources & referencesView supporting material

Primary source

Daniel Ueltschi, “Quantum Heisenberg models and random loop representations”, arXiv:1211.4141 (2012).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.