2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91602Usually, decoherence is generated from the coupling with an outer environment. However, a macroscopic object generically possesses its own environment in itself, namely the complicated dynamics of internal degrees of freedom. We address a question: when and how the internal dynamics decohere interference of the center of mass motion of a macroscopic object. We will also show that weak localization of a macroscopic object in disordered potentials can be destroyed by such decoherence.5 pages, 2 figuresQuantum PhysicsMesoscale and Nanoscale Physicstext