Collet-Eckmann type conditions and conformal welding of unicritical quadratic laminations

Abstract

In this paper, we introduce a Collet-Eckmann type condition for the unicritical laminations on the unit circle. We prove that this condition implies the lamination admits a H\"older continuous conformal welding which produces a Julia set for some unicritical polynomial. In consequence, we present a new proof that almost all angles on the unit circle produce quadratic polynomials with H\"older Fatou components, without the use of Beurling's theorem.