2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/215146We study quantum Darwinism -- the redundant recording of information about a decohering system by its environment -- in zero-temperature quantum Brownian motion. An initially nonlocal quantum state leaves a record whose redundancy increases rapidly with its spatial extent. Significant delocalization (e.g., a Schroedinger's Cat state) causes high redundancy: many observers can measure the system's position without perturbing it. This explains the objective (i.e. classical) existence of einselected, decoherence-resistant pointer states of macroscopic objects.5 pagesQuantum PhysicsMesoscale and Nanoscale PhysicsHigh Energy Physics - Theorytext