qit.invariant.canonical_inv

qit.invariant.canonical_inv(U: np.array[complex]) → np.array[float]

Canonical local invariants of a two-qubit gate.

Computes a vector of three real canonical local invariants for the $U(4)$ matrix U, normalized to the range $[0,1]$.

Parameters

U (np.array[complex]) – $U(4)$ matrix

Returns

canonical local invariants of U

Return type

np.array[float]

Uses the algorithm in [10].