ApproximateCircuit¶
- class ApproximateCircuit(num_qubits, name=None)[fuente]¶
Bases:
QuantumCircuit
,ABC
A base class that represents an approximate circuit.
- Parámetros
num_qubits (
int
) – number of qubit this circuit will span.name (
Optional
[str
]) – a name of the circuit.
Methods Defined Here
Constructs this circuit out of the parameters(thetas). Parameter values must be set before
Attributes
- ancillas¶
Returns a list of ancilla bits in the order that the registers were added.
- Tipo del valor devuelto
List
[AncillaQubit
]
- calibrations¶
Return calibration dictionary.
The custom pulse definition of a given gate is of the form
{'gate_name': {(qubits, params): schedule}}
- Tipo del valor devuelto
dict
- clbits¶
Returns a list of classical bits in the order that the registers were added.
- Tipo del valor devuelto
List
[Clbit
]
- data¶
Return the circuit data (instructions and context).
- Devuelve
a list-like object containing the
CircuitInstruction
s for each instruction.- Tipo del valor devuelto
QuantumCircuitData
- extension_lib = 'include "qelib1.inc";'¶
- global_phase¶
Return the global phase of the circuit in radians.
- Tipo del valor devuelto
Union
[ParameterExpression
,float
]
- header = 'OPENQASM 2.0;'¶
- instances = 2536¶
- 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.- Tipo del valor devuelto
dict
- num_ancillas¶
Return the number of ancilla qubits.
- Tipo del valor devuelto
int
- num_clbits¶
Return number of classical bits.
- Tipo del valor devuelto
int
- num_parameters¶
The number of parameter objects in the circuit.
- Tipo del valor devuelto
int
- num_qubits¶
Return number of qubits.
- Tipo del valor devuelto
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.
- Tipo del valor devuelto
List
[int
]- Devuelve
List of integers representing instruction start times. The index corresponds to the index of instruction in
QuantumCircuit.data
.- Muestra
AttributeError – When circuit is not scheduled.
- parameters¶
The parameters defined in the circuit.
This attribute returns the
Parameter
objects in the circuit sorted alphabetically. Note that parameters instantiated with aParameterVector
are still sorted numerically.Ejemplos
The snippet below shows that insertion order of parameters does not matter.
>>> from qiskit.circuit import QuantumCircuit, Parameter >>> a, b, elephant = Parameter("a"), Parameter("b"), Parameter("elephant") >>> circuit = QuantumCircuit(1) >>> circuit.rx(b, 0) >>> circuit.rz(elephant, 0) >>> circuit.ry(a, 0) >>> circuit.parameters # sorted alphabetically! ParameterView([Parameter(a), Parameter(b), Parameter(elephant)])
Bear in mind that alphabetical sorting might be unituitive when it comes to numbers. The literal «10» comes before «2» in strict alphabetical sorting.
>>> from qiskit.circuit import QuantumCircuit, Parameter >>> angles = [Parameter("angle_1"), Parameter("angle_2"), Parameter("angle_10")] >>> circuit = QuantumCircuit(1) >>> circuit.u(*angles, 0) >>> circuit.draw() ┌─────────────────────────────┐ q: ┤ U(angle_1,angle_2,angle_10) ├ └─────────────────────────────┘ >>> circuit.parameters ParameterView([Parameter(angle_1), Parameter(angle_10), Parameter(angle_2)])
To respect numerical sorting, a
ParameterVector
can be used.>>> from qiskit.circuit import QuantumCircuit, Parameter, ParameterVector >>> x = ParameterVector("x", 12) >>> circuit = QuantumCircuit(1) >>> for x_i in x: ... circuit.rx(x_i, 0) >>> circuit.parameters ParameterView([ ParameterVectorElement(x[0]), ParameterVectorElement(x[1]), ParameterVectorElement(x[2]), ParameterVectorElement(x[3]), ..., ParameterVectorElement(x[11]) ])
- Tipo del valor devuelto
ParameterView
- Devuelve
The sorted
Parameter
objects in the circuit.
- prefix = 'circuit'¶
- qubits¶
Returns a list of quantum bits in the order that the registers were added.
- Tipo del valor devuelto
List
[Qubit
]
- thetas¶
The property is not implemented and raises a
NotImplementedException
exception.- Tipo del valor devuelto
ndarray
- Devuelve
a vector of parameters of this circuit.