2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92025We show that under the influence of pure vacuum noise two entangled qubits become completely disentangled in a finite time, and in a specific example we find the time to be given by $\ln \Big(\frac{2 +\sqrt 2}{2}\Big)$ times the usual spontaneous lifetime.revtex, 4 pages, 2 figuresQuantum Physicstext