cirq.KakDecomposition

A convenient description of an arbitrary two-qubit operation.

cirq.KakDecomposition(
    *,
    global_phase: complex = complex(1),
    single_qubit_operations_before: Optional[Tuple[np.ndarray, np.ndarray]] = None,
    interaction_coefficients: Tuple[float, float, float],
    single_qubit_operations_after: Optional[Tuple[np.ndarray, np.ndarray]] = None
)

Any two qubit operation U can be decomposed into the form

U = g · (a1 ⊗ a0) · exp(i·(x·XX + y·YY + z·ZZ)) · (b1 ⊗ b0)

This class stores g, (b0, b1), (x, y, z), and (a0, a1).

'An Introduction to Cartan's KAK Decomposition for QC Programmers' https://arxiv.org/abs/quant-ph/0507171

global_phase g from the above equation.
single_qubit_operations_before b0, b1 from the above equation.
interaction_coefficients x, y, z from the above equation.
single_qubit_operations_after a0, a1 from the above equation.

global_phase g from the above equation.
single_qubit_operations_before b0, b1 from the above equation.
interaction_coefficients x, y, z from the above equation.
single_qubit_operations_after a0, a1 from the above equation.

Methods

__eq__

View source

__eq__(
    other: _SupportsValueEquality
) -> bool

__ne__

View source

__ne__(
    other: _SupportsValueEquality
) -> bool