EvolvedOperatorAnsatz

class qiskit.circuit.library.EvolvedOperatorAnsatz(operators=None, reps=1, evolution=None, insert_barriers=False, name='EvolvedOps', parameter_prefix='t', initial_state=None, flatten=None)

GitHub

Bases: NLocal

The evolved operator ansatz.

Parameters

operators (BaseOperator | QuantumCircuit |list | None) – 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 (EvolutionBase | EvolutionSynthesis | None) – A specification of which evolution synthesis to use for the PauliEvolutionGate. Defaults to first order Trotterization.
insert_barriers (bool) – Whether to insert barriers in between each evolution.
name (str) – The name of the circuit.
parameter_prefix (str | Sequence[str]) – Set the names of the circuit parameters. If a string, the same prefix will be used for each parameters. Can also be a list to specify a prefix per operator.
initial_state (QuantumCircuit | None) – A QuantumCircuit object to prepend to the circuit.
flatten (bool | None) – Set this to True to output a flat circuit instead of nesting it inside multiple layers of gate objects. By default currently the contents of the output circuit will be wrapped in nested objects for cleaner visualization. However, if you’re using this circuit for anything besides visualization its strongly recommended to set this flag to True to avoid a large performance overhead for parameter binding.

Attributes

evolution

The evolution converter used to compute the evolution.

Returns

The evolution converter used to compute the evolution.

Return type

EvolutionSynthesis

num_qubits

Returns the number of qubits in this circuit.

Returns

The 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

preferred_init_points

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

name

Type: str

A human-readable name for the circuit.

Example

from qiskit import QuantumCircuit
 
qc = QuantumCircuit(2, 2, name="my_circuit")
print(qc.name)

my_circuit