Two-Qubit Entanglement Lab

Density-matrix simulation of qubits A and B

Prepare state

Gates on qubit A / qubit B

 on A
 on B

Environment & dynamics

Measure (Z basis)

Live readouts

Outcome probabilities (bars) & sampled shots (dots)

History (last seconds)

Entanglement is measured by log-negativity (1 ebit for a Bell pair). Local rotations never change it; dephasing and noise do. CHSH S above 2 is only reachable by entangled states (max 2√2).