Reformulation of Laplacian-$b$ motion in terms of stochastic Komatu-Loewner evolution in the chordal case

Abstract

We investigate the relation between the Laplacian-$b$ motion and stochastic Komatu-Loewner evolution (SKLE) on multiply connected subdomains of the upper half-plane, both of which are analogues to SLE. In particular, we show that, if the driving function of an SKLE is given by a certain stochastic differential equation, then this SKLE is the same as a time-changed Laplacian-$b$ motion. As an application, we prove the finite time explosion of SKLE corresponding to Laplacian-$0$ motion, or $\mathrm{SL}{\mathrm{E}}_6$, in the sense that the solution to the Komatu-Loewner equation for the slits blows up.