Absolutely continuous spectrum for the Anderson model on a tree: a geometric proof of Klein's theorem

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104688We give a new proof of a version of Klein's theorem on the existence of absolutely continuous spectrum for the Anderson model on the Bethe Lattice at weak disorder.Mathematical Physics82B44, 34L35Absolutely continuous spectrum for the Anderson model on a tree: a geometric proof of Klein's theoremtext