WeightedSumOperator
WeightedSumOperator(num_state_qubits, weights, i_state=None, i_sum=None)
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
Attributes
num_carry_qubits
returns num carry qubits
num_state_qubits
returns num state qubits
num_sum_qubits
returns num sum qubits
num_target_qubits
Returns the number of target qubits
weights
returns weights
Methods
build
WeightedSumOperator.build(qc, q, q_ancillas=None, params=None)
Adds corresponding sub-circuit to given circuit
Parameters
- qc (QuantumCircuit) – quantum circuit
- q (list) – list of qubits (has to be same length as self._num_qubits)
- q_ancillas (list) – list of ancilla qubits (or None if none needed)
- params (list) – parameters for circuit
build_controlled
WeightedSumOperator.build_controlled(qc, q, q_control, q_ancillas=None, use_basis_gates=True)
Adds corresponding controlled sub-circuit to given circuit
Parameters
- qc (QuantumCircuit) – quantum circuit
- q (list) – list of qubits (has to be same length as self._num_qubits)
- q_control (Qubit) – control qubit
- q_ancillas (list) – list of ancilla qubits (or None if none needed)
- use_basis_gates (bool) – use basis gates for expansion of controlled circuit
build_controlled_inverse
WeightedSumOperator.build_controlled_inverse(qc, q, q_control, q_ancillas=None, use_basis_gates=True)
Adds controlled inverse of corresponding sub-circuit to given circuit
Parameters
- qc (QuantumCircuit) – quantum circuit
- q (list) – list of qubits (has to be same length as self._num_qubits)
- q_control (Qubit) – control qubit
- q_ancillas (list) – list of ancilla qubits (or None if none needed)
- use_basis_gates (bool) – use basis gates for expansion of controlled circuit
build_controlled_inverse_power
WeightedSumOperator.build_controlled_inverse_power(qc, q, q_control, power, q_ancillas=None, use_basis_gates=True)
Adds controlled, inverse, power of corresponding circuit. May be overridden if a more efficient implementation is possible
build_controlled_power
WeightedSumOperator.build_controlled_power(qc, q, q_control, power, q_ancillas=None, use_basis_gates=True)
Adds controlled power of corresponding circuit. May be overridden if a more efficient implementation is possible
build_inverse
WeightedSumOperator.build_inverse(qc, q, q_ancillas=None)
Adds inverse of corresponding sub-circuit to given circuit
Parameters
- qc (QuantumCircuit) – quantum circuit
- q (list) – list of qubits (has to be same length as self._num_qubits)
- q_ancillas (list) – list of ancilla qubits (or None if none needed)
build_inverse_power
WeightedSumOperator.build_inverse_power(qc, q, power, q_ancillas=None)
Adds inverse power of corresponding circuit. May be overridden if a more efficient implementation is possible
build_power
WeightedSumOperator.build_power(qc, q, power, q_ancillas=None)
Adds power of corresponding circuit. May be overridden if a more efficient implementation is possible
get_num_qubits
WeightedSumOperator.get_num_qubits()
returns number of qubits
get_num_qubits_controlled
WeightedSumOperator.get_num_qubits_controlled()
returns number of qubits controlled
get_required_sum_qubits
static WeightedSumOperator.get_required_sum_qubits(weights)
get required sum qubits
required_ancillas
WeightedSumOperator.required_ancillas()
required ancillas
required_ancillas_controlled
WeightedSumOperator.required_ancillas_controlled()
returns required ancillas controlled