qml.estimator.templates.OutMultiplier

class OutMultiplier(a_num_wires, b_num_wires, wires=None)

Bases: ResourceOperator

Resource class for the OutMultiplier gate.

Parameters:

• a_num_wires (int) – the size of the first input register

• b_num_wires (int) – the size of the second input register

• wires (Sequence[int], None) – the wires the operation acts on

Resources:

The resources are obtained from appendix G, lemma 10 in PRX Quantum, 2, 040332 (2021).

See also

The corresponding PennyLane operation OutMultiplier.

Example

The resources for this operation are computed using:

>>> import pennylane.estimator as qre
>>> out_mul = qre.OutMultiplier(4, 4)
>>> print(qre.estimate(out_mul))
--- Resources: ---
Total wires: 16
    algorithmic wires: 16
    allocated wires: 0
    zero state: 0
    any state: 0
Total gates : 70
'Toffoli': 14,
'CNOT': 14,
'Hadamard': 42

Attributes

resource_keys
resource_params	Returns a dictionary containing the minimal information needed to compute the resources.

resource_keys = {'a_num_wires', 'b_num_wires'}

resource_params

Returns a dictionary containing the minimal information needed to compute the resources.

Returns:

A dictionary containing the resource parameters:

• a_num_wires (int): the size of the first input register

• b_num_wires (int): the size of the second input register

Return type:

dict

Methods

resource_decomp(a_num_wires, b_num_wires)	Returns a list representing the resources of the operator.
resource_rep(a_num_wires, b_num_wires)	Returns a compressed representation containing only the parameters of the Operator that are needed to compute a resource estimation.

classmethod resource_decomp(a_num_wires, b_num_wires)

Returns a list representing the resources of the operator. Each object in the list represents a gate and the number of times it occurs in the circuit.

Parameters:

• a_num_wires (int) – the size of the first input register

• b_num_wires (int) – the size of the second input register

Resources:

The resources are obtained from appendix G, lemma 10 in PRX Quantum, 2, 040332 (2021).

Returns:

A list of GateCount objects, where each object represents a specific quantum gate and the number of times it appears in the decomposition.

Return type:

list[GateCount]

classmethod resource_rep(a_num_wires, b_num_wires)

Returns a compressed representation containing only the parameters of the Operator that are needed to compute a resource estimation.

Parameters:

• a_num_wires (int) – the size of the first input register

• b_num_wires (int) – the size of the second input register

Returns:

the operator in a compressed representation

Return type:

CompressedResourceOp

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