EvolvedOperatorAnsatz¶
- class EvolvedOperatorAnsatz(operators=None, reps=1, evolution=None, insert_barriers=False, name='EvolvedOps', parameter_prefix='t', initial_state=None)[source]¶
Bases :
NLocal
The evolved operator ansatz.
- Paramètres
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.parameter_prefix (
Union
[str
,List
[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 (
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.
- Type renvoyé
List
[AncillaQubit
]
- calibrations¶
Return calibration dictionary.
The custom pulse definition of a given gate is of the form
{'gate_name': {(qubits, params): schedule}}
- Type renvoyé
dict
- clbits¶
Returns a list of classical bits in the order that the registers were added.
- Type renvoyé
List
[Clbit
]
- data¶
- entanglement¶
Get the entanglement strategy.
- Type renvoyé
Union
[str
,List
[str
],List
[List
[str
]],List
[int
],List
[List
[int
]],List
[List
[List
[int
]]],List
[List
[List
[List
[int
]]]],Callable
[[int
],str
],Callable
[[int
],List
[List
[int
]]]]- Renvoie
The entanglement strategy, see
get_entangler_map()
for more detail on how the format is interpreted.
- entanglement_blocks¶
The blocks in the entanglement layers.
- Type renvoyé
List
[Instruction
]- Renvoie
The blocks in the entanglement layers.
- evolution¶
The evolution converter used to compute the evolution.
- Renvoie
The evolution converter used to compute the evolution.
- Type renvoyé
- extension_lib = 'include "qelib1.inc";'¶
- global_phase¶
Return the global phase of the circuit in radians.
- Type renvoyé
Union
[ParameterExpression
,float
]
- header = 'OPENQASM 2.0;'¶
- initial_state¶
Return the initial state that is added in front of the n-local circuit.
- Type renvoyé
- Renvoie
The initial state.
- insert_barriers¶
If barriers are inserted in between the layers or not.
- Type renvoyé
bool
- Renvoie
True
, if barriers are inserted in between the layers,False
if not.
- instances = 2016¶
- 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.- Type renvoyé
dict
- num_ancillas¶
Return the number of ancilla qubits.
- Type renvoyé
int
- num_clbits¶
Return number of classical bits.
- Type renvoyé
int
- num_layers¶
Return the number of layers in the n-local circuit.
- Type renvoyé
int
- Renvoie
The number of layers in the circuit.
- num_parameters¶
- Type renvoyé
int
- num_parameters_settable¶
The number of total parameters that can be set to distinct values.
This does not change when the parameters are bound or exchanged for same parameters, and therefore is different from
num_parameters
which counts the number of uniqueParameter
objects currently in the circuit.- Type renvoyé
int
- Renvoie
The number of parameters originally available in the circuit.
Note
This quantity does not require the circuit to be built yet.
- num_qubits¶
- Type renvoyé
int
- op_start_times¶
Return a list of operation start times.
This attribute is enabled once one of scheduling analysis passes runs on the quantum circuit.
- Type renvoyé
List
[int
]- Renvoie
List of integers representing instruction start times. The index corresponds to the index of instruction in
QuantumCircuit.data
.- Lève
AttributeError – When circuit is not scheduled.
- operators¶
The operators that are evolved in this circuit.
- Renvoie
The operators to be evolved (and circuits) contained in this ansatz.
- Type renvoyé
list
- ordered_parameters¶
The parameters used in the underlying circuit.
This includes float values and duplicates.
Exemples
>>> # prepare circuit ... >>> print(nlocal) ┌───────┐┌──────────┐┌──────────┐┌──────────┐ q_0: ┤ Ry(1) ├┤ Ry(θ[1]) ├┤ Ry(θ[1]) ├┤ Ry(θ[3]) ├ └───────┘└──────────┘└──────────┘└──────────┘ >>> nlocal.parameters {Parameter(θ[1]), Parameter(θ[3])} >>> nlocal.ordered_parameters [1, Parameter(θ[1]), Parameter(θ[1]), Parameter(θ[3])]
- Type renvoyé
List
[Parameter
]- Renvoie
The parameters objects used in the circuit.
- parameter_bounds¶
The parameter bounds for the unbound parameters in the circuit.
- Type renvoyé
Optional
[List
[Tuple
[float
,float
]]]- Renvoie
A list of pairs indicating the bounds, as (lower, upper). None indicates an unbounded parameter in the corresponding direction. If
None
is returned, problem is fully unbounded.
- parameters¶
- Type renvoyé
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.
- Type renvoyé
List
[Qubit
]
- reps¶
The number of times rotation and entanglement block are repeated.
- Type renvoyé
int
- Renvoie
The number of repetitions.
- rotation_blocks¶
The blocks in the rotation layers.
- Type renvoyé
List
[Instruction
]- Renvoie
The blocks in the rotation layers.