2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92407Using the approach to quantum entanglement based on the quantum fluctuations of observables, we show the existence of perfect entangled states of a single "spin-1" particle. We give physical examples related to the photons, condensed matter physics, and particle physics.7 pages, no figures, submitted to Journal of Optics BQuantum Physicstext