Skip to main contentIBM Quantum Documentation
You are viewing the API reference for an old version of Qiskit SDK. Switch to latest version

qiskit.quantum_info.entanglement_of_formation

entanglement_of_formation(state)

GitHub(opens in a new tab)

Calculate the entanglement of formation of quantum state.

The input quantum state must be either a bipartite state vector, or a 2-qubit density matrix.

Parameters

state (Statevector orDensityMatrix) – a 2-qubit quantum state.

Returns

The entanglement of formation.

Return type

float

Raises

  • QiskitError – if the input state is not a valid QuantumState.
  • QiskitError – if input is not a bipartite QuantumState.
  • QiskitError – if density matrix input is not a 2-qubit state.
Was this page helpful?
Report a bug or request content on GitHub.