WeightedSumOperator¶

class WeightedSumOperator(num_state_qubits, weights, i_state=None, i_sum=None)[source]¶

Bases: qiskit.aqua.utils.circuit_factory.CircuitFactory

Adds q^T * w to separate register for non-negative integer weights w.

Computes the weighted sum controlled by state qubits

Parameters

num_state_qubits (int) – number of state qubits
weights (Union(list, numpy.ndarray)) – weights per state qubits
i_state (Optional(Union(list, numpy.ndarray))) – indices of state qubits, set to range(num_state_qubits) if None
i_sum (Optional(int)) – indices of target qubits (that represent the resulting sum), set to range(num_state_qubits, num_state_qubits + req_num_sum_qubits) if None

Raises

AquaError – invalid input

Methods

`build`	Adds corresponding sub-circuit to given circuit
`build_controlled`	Adds corresponding controlled sub-circuit to given circuit
`build_controlled_inverse`	Adds controlled inverse of corresponding sub-circuit to given circuit
`build_controlled_inverse_power`	Adds controlled, inverse, power of corresponding circuit.
`build_controlled_power`	Adds controlled power of corresponding circuit.
`build_inverse`	Adds inverse of corresponding sub-circuit to given circuit
`build_inverse_power`	Adds inverse power of corresponding circuit.
`build_power`	Adds power of corresponding circuit.
`get_num_qubits`	returns number of qubits
`get_num_qubits_controlled`	returns number of qubits controlled
`get_required_sum_qubits`	get required sum qubits
`required_ancillas`	required ancillas
`required_ancillas_controlled`	returns required ancillas controlled

Attributes