2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/131638Upon reviewing the physical review letter which describes the processes involved in "demonstration of a controllable three-dimensional Brownian motor in symmetric potentials" we conclude that such processes are not compatible with what Einstein and many other physicists and engineers define as Brownian motors or Brownian movements.12 pagesQuantum Physicstext