Monogamy of Entanglement — CKW Tangle Conservation

Entanglement is a shared resource, and it turns out to be a jealous one: a qubit cannot be maximally entangled with two partners at once. This simulator renders a live three-qubit W-class state |ψ⟩ = a|100⟩ + b|010⟩ + c|001⟩ as three glowing nodes joined by two entanglement bonds, and lets you redistribute a single shared excitation between qubits B and C while watching the Coffman-Kundu-Wootters monogamy relation hold exactly: the sum of the two pairwise tangles never exceeds — and for this state family, always equals — the one-versus-rest tangle of qubit A against the pair. Push entanglement toward B and the A–C bond visibly dims by precisely the amount the A–B bond brightens.