Euler integrals for commuting SLEs

Details Euler integrals for commuting SLEs Euler integrals for commuting SLEs

2005-07-13

arxiv.org/abs/math/0507276v3

J. Statist. Phys. 123 (2006), no. 6, 1183--1218

Mathematics

Probability

v3: minor revision. 28 pages. to appear in J. Statist. Phys

Scientific paper

10.1007/s10955-006-9132-9

Schramm-Loewner Evolutions (SLEs) have proved an efficient way to describe a single continuous random conformally invariant interface in a simply-connected planar domain; the admissible probability distributions are parameterized by a single positive parameter $\kappa$. As shown in \cite{D6}, the coexistence of $n$ interfaces in such a domain implies algebraic (``commutation'') conditions. In the most interesting situations, the admissible laws on systems of $n$ interfaces are parameterized by $\kappa$ and the solution of a particular (finite rank) holonomic system. The study of solutions of differential systems, in particular their global behaviour, often involves the use of integral representations. In the present article, we provide Euler integral representations for solutions of holonomic systems arising from SLE commutation. Applications to critical percolation (general crossing formulae), Loop-Erased Random Walks (direct derivation of Fomin's formulae in the scaling limit), and Uniform Spanning Trees are discussed. The connection with conformal restriction and Poissonized non-intersection for chordal SLEs is also studied.

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