Abstract:
We will consider FK percolation on 
with infinite range interactions of the form 
where 
is a norm on 
and 
is a subexponential correction. We will expose optimal conditions for the existence of a ‘saturation regime’ (that is, the existence of 
such that the inverse correlation length in the direction s is constant on [0,
. Under suitable conditions, we will then explain how to derive sharp asymptotics of the two-point connectivity function (that are not of the Ornstein-Zernike type) and estimates on the volume of the connected component of 
in the whole saturation regime. Our analysis uses the OSSS inequality adapted for the infinite range interactions and a one step renormalization argument to study the two-point connectivity function. Our analysis also applies in the case where the interactions decay subexponentially fast in the whole subcritical regime. The first half of the talk will be focused on exposing the results, heuristics, and remaining open problems, while the second half will be an exposition of the core ideas used in the proof.
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Based on
https://arxiv.org/pdf/2207.02193.pdf