2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89038We investigate the control resources needed to effect arbitrary quantum dynamics. We show that the ability to perform measurements on a quantum system, combined with the ability to feed back the measurement results via coherent control, allows one to control the system to follow any desired open-system evolution. Such universal control can be achieved, in principle, through the repeated application of only two coherent control operations and a simple ``Yes-No'' measurement.4 pages, no figures; REVTeX styleQuantum Physicstext