Mathematics – Probability
Scientific paper
2010-06-11
Mathematics
Probability
This paper has been merged with version 2 of arxiv:1006.2374. The merged longer paper is posted on ArxiV as version 3 of arxiv
Scientific paper
The two-dimensional Brownian loop-soup is a Poissonian random collection of loops in a planar domain with an intensity parameter c. When c is not greater than 1, we show that the outer boundaries of the loop clusters are disjoint simple loops (when c>1, there is almost surely only one cluster) that satisfy certain conformal restriction axioms. We prove various results about loop-soups, cluster sizes, and the c=1 phase transition. Combining this with the results of another paper of ours on the Markovian characterization of simple conformal loop ensembles (CLE), this proves that these outer boundaries of clusters of Brownian loops are in fact SLE(k) loops for k in (8/3, 4]. More generally, it completes the proof of the fact that the following three descriptions of simple CLEs (proposed in earlier works by the authors) are equivalent: (1) The random loop ensembles traced by branching Schramm-Loewner Evolution (SLE(k)) curves for k in (8/3, 4]. (2) The outer-cluster-boundary ensembles of Brownian loop-soups. (3) The (only) random loop ensembles satisfying the conformal restriction axioms.
Sheffield Scott
Werner Wendelin
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