## Electronic Communications in Probability

### Geometric Interpretation of Half-Plane Capacity

#### Abstract

Schramm-Loewner Evolution describes the scaling limits of interfaces in certain statistical mechanical systems. These interfaces are geometric objects that are not equipped with a canonical parametrization. The standard parametrization of SLE is via half-plane capacity, which is a conformal measure of the size of a set in the reference upper half-plane. This has useful harmonic and complex analytic properties and makes SLE a time-homogeneous Markov process on conformal maps. In this note, we show that the half-plane capacity of a hull $A$ is comparable up to multiplicative constants to more geometric quantities, namely the area of the union of all balls centered in $A$ tangent to $R$, and the (Euclidean) area of a $1$-neighborhood of $A$ with respect to the hyperbolic metric.

#### Article information

Source
Electron. Commun. Probab. Volume 14 (2009), paper no. 55, 566-571.

Dates
Accepted: 21 December 2009
First available in Project Euclid: 6 June 2016

http://projecteuclid.org/euclid.ecp/1465234764

Digital Object Identifier
doi:10.1214/ECP.v14-1517

Mathematical Reviews number (MathSciNet)
MR2576752

Zentralblatt MATH identifier
1191.60094

Subjects
Primary: 82B31: Stochastic methods

Rights