2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90879Associating a physical process with the pure entangled state 1/sqrt 2 (|00> + |11>) is an idealization unless the pair is so prepared using an appropriate quantum gate operating on a known state. Questions related to the reference frame for measurement of the entangled state are considered. Some applications are described.7 pages, edited materialQuantum Physicstext