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Scaling limit of the loop-erased random walk Green’s function
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.). Uppsala University, Sweden.
2015 (English)In: Probability theory and related fields, ISSN 0178-8051, E-ISSN 1432-2064Article in journal (Refereed) Published
Abstract [en]

We consider loop-erased random walk (LERW) running between two boundary points of a square grid approximation of a planar simply connected domain. The LERW Green’s function is the probability that the LERW passes through a given edge in the domain. We prove that this probability, multiplied by the inverse mesh size to the power 3/4, converges in the lattice size scaling limit to (a constant times) an explicit conformally covariant quantity which coincides with the (Formula presented.) Green’s function. The proof does not use SLE techniques and is based on a combinatorial identity which reduces the problem to obtaining sharp asymptotics for two quantities: the loop measure of random walk loops of odd winding number about a branch point near the marked edge and a “spinor” observable for random walk started from one of the vertices of the marked edge.

Place, publisher, year, edition, pages
Springer, 2015.
Keyword [en]
Fomin’s identity, Green’s function, loop measure, Loop-erased random walk, Poisson kernel, scaling limit, Schramm–Loewner evolution
National Category
URN: urn:nbn:se:kth:diva-177752DOI: 10.1007/s00440-015-0655-3ScopusID: 2-s2.0-84940055942OAI: diva2:875084

QC 20151130

Available from: 2015-11-30 Created: 2015-11-25 Last updated: 2015-11-30Bibliographically approved

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Viklund, Fredrik
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ReferencesLink to record
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