EvolvedOperatorAnsatz¶

class EvolvedOperatorAnsatz(operators=None, reps=1, evolution=None, insert_barriers=False, name='EvolvedOps', initial_state=None)[source]

Bases: qiskit.circuit.library.blueprintcircuit.BlueprintCircuit

The evolved operator ansatz.

Parameters
• operators (Optional[Union[OperatorBase, QuantumCircuit, list]) – The operators to evolve. If a circuit is passed, we assume it implements an already evolved operator and thus the circuit is not evolved again. Can be a single operator (circuit) or a list of operators (and circuits).

• reps (int) – The number of times to repeat the evolved operators.

• evolution (Optional[EvolutionBase]) – An opflow converter object to construct the evolution. Defaults to Trotterization.

• insert_barriers (bool) – Whether to insert barriers in between each evolution.

• name (str) – The name of the circuit.

• initial_state (Optional[QuantumCircuit]) – A QuantumCircuit object to prepend to the circuit.

Attributes

ancillas

Returns a list of ancilla bits in the order that the registers were added.

calibrations

Return calibration dictionary.

The custom pulse definition of a given gate is of the form

{‘gate_name’: {(qubits, params): schedule}}

clbits

Returns a list of classical bits in the order that the registers were added.

data
evolution

The evolution converter used to compute the evolution.

Returns

The evolution converter used to compute the evolution.

Return type

EvolutionBase

extension_lib = 'include "qelib1.inc";'
global_phase

Return the global phase of the circuit in radians.

header = 'OPENQASM 2.0;'
initial_state

The initial state.

Return type

QuantumCircuit

instances = 16
metadata

The user provided metadata associated with the circuit

The metadata for the circuit is a user provided dict of metadata for the circuit. It will not be used to influence the execution or operation of the circuit, but it is expected to be passed between all transforms of the circuit (ie transpilation) and that providers will associate any circuit metadata with the results it returns from execution of that circuit.

num_ancillas

Return the number of ancilla qubits.

num_clbits

Return number of classical bits.

num_parameters
Return type

int

num_qubits

Return number of qubits.

operators

The operators that are evolved in this circuit.

Returns

The operators to be evolved (and circuits) contained in this ansatz.

Return type

list

parameters
Return type

ParameterView

preferred_init_points

Getter of preferred initial points based on the given initial state.

prefix = 'circuit'
qregs

A list of the quantum registers associated with the circuit.

qubits

Returns a list of quantum bits in the order that the registers were added.

reps

The number of times the evolved operators are repeated.

Return type

int