Skip to main contentIBM Quantum Documentation
This page is from an old version of Qiskit SDK and does not exist in the latest version. We recommend you migrate to the latest version. See the release notes for more information.
Important

IBM Quantum Platform is moving and this version will be sunset on July 1. To get started on the new platform, read the migration guide.

concurrence

concurrence(state)

GitHub

Calculate the concurrence.

Parameters

state (np.array) – a quantum state (1x4 array) or a density matrix (4x4 array)

Returns

concurrence.

Return type

float

Raises

Exception – if attempted on more than two qubits.

Was this page helpful?
Report a bug or request content on GitHub.