Cle Percolations

Abstract

Conformal loop ensembles (CLEs) are random collections of loops in a simply connected domain, whose laws are characterized by a natural conformal invariance property. The set of points not surrounded by any loop is a canonical random connected fractal set -a random and conformally invariant analog of the Sierpinski carpet or gasket.In the present paper, we derive a direct relationship between the CLEs with simple loops (CLE κ for κ ∈ (8/3, 4), whose loops are Schramm's SLE κ -type curves) and the corresponding CLEs with nonsimple loops (CLE κ with κ := 16/κ ∈ (4, 6), whose loops are SLE κ -type curves). This correspondence is the continuum analog of the Edwards-Sokal coupling between the q-state Potts model and the associated FK random cluster model, and its generalization to noninteger q.Like its discrete analog, our continuum correspondence has two directions. First, we show that for each κ ∈ (8/3, 4), one can construct a variant of CLE κ as follows: start with an instance of CLE κ , then use a biased coin to independently color each CLE κ loop in one of two colors, and then consider the outer boundaries of the clusters of loops of a given color. Second, we show how to interpret CLE κ loops as interfaces of a continuum analog of critical Bernoulli percolation within CLE κ carpets -this is the first construction of continuum percolation on a fractal planar domain. It extends and generalizes the continuum percolation on open domains defined by SLE 6 and CLE 6 .These constructions allow us to prove several conjectures made by the second author and provide new and perhaps surprising interpretations of the relationship between CLEs and the Gaussian free field. Along the way, we obtain new results about generalized SLE κ (ρ) curves for ρ < −2, such as their decomposition into collections of SLE κ -type 'loops' hanging off of SLE κ -type 'trunks', and vice versa (exchanging κ and κ ). We also define a continuous family of natural CLE variants called boundary conformal loop ensembles (BCLEs) that share some (but not all) of the conformal symmetries that characterize CLEs, and that should be scaling limits of

Imaginary geometry IV: interior rays, whole-plane reversibility, and space-filling trees

“…The results here will also be an important part of the proofs of several results in joint work by the authors and with Wendelin Werner [20,27] about continuum analogs of FK models, conformal loop ensembles, and SLE κ (ρ) processes with ρ < −2. For example, the first proof that the SLE κ (ρ) processes with ρ < −2 are continuous will be derived as a consequence of the continuity of the space-filling SLE processes introduced here.…”

Planar Ising Model at Criticality: State-of-the-Art and Perspectives

“…In parallel, an exploration algorithm aiming at the proof of the convergence of the classical domain walls ensemble to CLE(3) was suggested in [27] and later, via the convergence of the so-called free arc ensemble established in [4], this convergence to CLE(3) has also been justified by Benoist and Hongler [3]. Recently, another approach to derive the convergence of the domain walls loop ensemble to CLE(3) from that of the random cluster one to CLE(16/3) was suggested in [42].…”

Exponential Decay for the Near‐Critical Scaling Limit of the Planar Ising Model

“…Indeed, a main contribution of this paper is a demonstration of the utility of such coupled loop and measure ensembles. Relevant CLE κ results are in [50], [51], [41]. Conformal measure ensembles and their coupling to CLE κ were proposed in [15] and carried out in [8] for κ = 6 and 16/3.…”