cirq.deconstruct_single_qubit_matrix_into_angles

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Breaks down a 2x2 unitary into ZYZ angle parameters.

cirq.deconstruct_single_qubit_matrix_into_angles(
    mat: np.ndarray
) -> Tuple[float, float, float]

Given a unitary U, this function returns three angles: $\phi_0, \phi_1, \phi_2$, such that: $U = Z^{\phi_2 / \pi} Y^{\phi_1 / \pi} Z^{\phi_0/ \pi}$ for the Pauli matrices Y and Z. That is, phasing around Z by $\phi_0$ radians, then rotating around Y by $\phi_1$ radians, and then phasing again by $\phi_2$ radians will produce the same effect as the original unitary. (Note that the matrices are applied right to left.)