Geometric description of some Loewner chains with infinitely many slits

Abstract

We study the chordal Loewner equation associated with certain driving functions that produce infinitely many slits. Specifically, for a choice of a sequence of positive numbers $(b_n)_{n\ge1}$ and points of the real line $(k_n)_{n\ge1}$, we explicitily solve the Loewner PDE $$ \dfrac{\partial f}{\partial t}(z,t)=-f'(z,t)\sum_{n=1}^{+\infty}\dfrac{2b_n}{z-k_n\sqrt{1-t}}$$ in $\mathbb{H}\times[0,1)$. Using techniques involving the harmonic measure, we analyze the geometric behaviour of its solutions, as $t\rightarrow1^-$.