On the existence of SLE trace: finite energy drivers and non-constant κ

Article Type

Research Article

Publication Title

Probability Theory and Related Fields

Abstract

Existence of Loewner trace is revisited. We identify finite energy paths (the “skeleton of Wiener measure”) as natural class of regular drivers for which we find simple and natural estimates in terms of their (Cameron–Martin) norm. Secondly, now dealing with potentially rough drivers, a representation of the derivative of the (inverse of the) Loewner flow is given in terms of a rough- and then pathwise Föllmer integral. Assuming the driver within a class of Itô-processes, an exponential martingale argument implies existence of trace. In contrast to classical (exact) SLE computations, our arguments are well adapted to perturbations, such as non-constant κ (assuming < 2 for technical reasons) and additional finite-energy drift terms.

First Page

353

Last Page

376

DOI

10.1007/s00440-016-0731-3

Publication Date

10-1-2017

Comments

Open Access, Green

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