2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44791In the measurement of a continuous observable Q, the pure components of the reduced state do, in general, depend on the initial state. For measurements which attempt to localize the measured system in a certain region R, the localized wave functions are proportional to the original wave function outside of R. This `quantum memory' effect shows that it is not possible to perfectly localize a quantum particle.8 pages with 1 figure available upon requestHigh Energy Physics - Phenomenologytext