2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/134819We analyze the separability of the joint state of a collection of two-level systems at finite temperature T. The fact that only separable states are found in the neighborhood of their thermal equilibrium state guarantees that decoherence will destroy any initially arranged entanglement in a finite time.4 pages, 2 figuresQuantum PhysicsStatistical Mechanicstext