workbench_algorithms.experimental.subroutines.multiplexed_rotations

Submodule imports for experimental multiplexed rotations.

GrayCodeMultiplexedSingleQubitRotation

GrayCodeMultiplexedSingleQubitRotation(**kwargs)

Bases: Qubrick

Decomposition of uniformly controlled rotations to single qubit rotation + CNOTs.

Figure 2 in arXiv:0407010.

compute

compute(
    index_reg: Qubits,
    target_reg: Qubits,
    rot_data: MultiplexedRotationDataInterface,
    ctrl: Qubits | int = 0,
)

Compute the multiplexed rotation.

Parameters:

Name	Type	Description	Default
index_reg	Qubits	Index qubits.	required
target_reg	Qubits	Target qubit.	required
rot_data	MultiplexedRotationDataInterface	Encodes the data needed to implement the uniformly controlled rotations.	required
ctrl	Qubits | int	Register to control on. Defaults to 0.	0

MultiplexedSingleQubitRotationViaQROM

MultiplexedSingleQubitRotationViaQROM(
    qrom: QROM,
    rotation_qbk: SuperpositionRotations,
    controlled_on: bool | None = None,
    lambda_val: int | None = None,
    **kwargs,
)

Bases: Qubrick

Multiplexor using data-lookup oracles.

Detailed in arXiv:1812.00954 (circuit described in Appendix D).

This technique for multiplexed rotations works by first loading a truncated, integerized, b-bit approximation of rotation angles onto an ancillary register and then performing the rotations coherently in superposition controlled on this register.

Parameters:

Name	Type	Description	Default
qrom	QROM	Data-loader for loading angles to b_of_p-bits of precision.	required
rotation_qbk	SuperpositionRotations	Qubrick to implement the actual rotations (e.g. via phase gradient addition).	required
controlled_on	bool | None	whether the prep circuit is controlled on, default to None.	None
lambda_val	int | None	the SEL-SWAP tunable parameter, default to None and optimized Toffoli version is used.	None
**kwargs	dict[str, Any]	Other arguments to pass to the init.	{}

controlled_on property

controlled_on: Qubrick

Flag to determine which component to control the Qubrick on, QROM or the rotations.

compute

compute(
    index_reg: Qubits,
    target_reg: Qubits,
    rot_data: MultiplexedRotationDataInterface,
    ctrl: Qubits | int = 0,
)

Compute circuit for Data-lookup multiplexor.

Parameters:

Name	Type	Description	Default
index_reg	Qubits	Index register.	required
target_reg	Qubits	Register to apply rotations onto.	required
rot_data	MultiplexedRotationDataInterface	Dataclass that containerizes the classical input data needed for the multiplexed rotations.	required
ctrl	Qubits | int	Control register.	0

NaiveMultiplexedSingleQubitRotation

NaiveMultiplexedSingleQubitRotation(
    multiplexor: Multiplexor = None, **kwargs
)

Bases: Qubrick

Controlled rotations from arXiv:0407010.

Parameters:

Name	Type	Description	Default
multiplexor	Multiplexor	Qubrick for implementing the multiplexing over the rotations.	None
**kwargs	dict[str, Any]	Other arguments to pass to the init.	{}

multiplexor property

multiplexor

Getter for the multiplexor.

compute

compute(
    index_reg: Qubits,
    target_reg: Qubits,
    rot_data: MultiplexedRotationDataInterface,
    ctrl: Qubits | int = 0,
)

Compute the multiplexed rotation.

Parameters:

Name	Type	Description	Default
index_reg	Qubits	Index qubits.	required
target_reg	Qubits	Target qubits.	required
rot_data	MultiplexedRotationDataInterface	Dataclass that containerizes the classical input data needed for the multiplexed rotations.	required
ctrl	Qubits | int	Register to control on.	0