Entanglement map · Established

Four qubits fall into nine families

Proved, with a source.

The classification of pure four-qubit states under stochastic LOCC yields nine families, some of them with continuous parameters.

Connections

• Part of: Multipartite entanglement
• See also: Three qubits can be entangled in two inequivalent ways

Sources

• Four qubits can be entangled in nine different ways. F. Verstraete, J. Dehaene, B. De Moor, H. Verschelde, 2001.

Checked 2026-10-30.