The Correlator Toolbox, Metrics and Moduli

Abstract

We discuss the possible set of operators from various boundary conformal field theories to build meaningful correlators that lead via a Loewner type procedure to generalisations of SLE($κ,ρ$). We also highlight the necessity of moduli for a consistent kinematic description of these more general stochastic processes. As an illustration we give a geometric derivation of $\text{SLE}(κ,ρ)$ in terms of conformally invariant random growing compact subsets of polygons. The parameters $ρ_j$ are related to the exterior angles of the polygons. We also show that $\text{SLE}(κ,ρ)$ can be generated by a Brownian motion in a gravitational background, where the metric and the Brownian motion are coupled. The metric is obtained as the pull-back of the Euclidean metric of a fluctuating polygon.