Full 3-qubit state-vector simulation (8 complex amplitudes). The noisy pair is the Werner state p|Φ+><Φ+| + (1-p)I/4, sampled as quantum trajectories: |Φ+> with probability (1+3p)/4, otherwise one of the other Bell states. Mean fidelity converges to (1+p)/2. Click a circuit column to jump to that step. Bennett et al., PRL 70, 1895 (1993).