GRX¶
- class GRX(num_qubits, theta)[source]¶
Bases :
GR
Global RX gate.
Circuit symbol:
┌──────────┐ q_0: ┤0 ├ │ │ q_1: ┤1 GRX(ϴ) ├ │ │ q_2: ┤2 ├ └──────────┘
The global RX gate is native to atomic systems (ion traps, cold neutrals). The global RX can be applied to multiple qubits simultaneously.
In the one-qubit case, this is equivalent to an RX(theta) operations, and is thus reduced to the RXGate. The global RX gate is a direct sum of RX operations on all individual qubits.
\[GRX(\theta) = \exp(-i \sum_{i=1}^{n} X_i \theta/2)\]Expanded Circuit:
Create a new Global RX (GRX) gate.
- Paramètres
num_qubits (
int
) – number of qubits.theta (
float
) – rotation angle about x-axis
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¶
Return the circuit data (instructions and context).
- Renvoie
a list-like object containing the
CircuitInstruction
s for each instruction.- Type renvoyé
QuantumCircuitData
- 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;'¶
- instances = 94¶
- 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_parameters¶
The number of parameter objects in the circuit.
- Type renvoyé
int
- num_qubits¶
Return number of 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.
- 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.Exemples
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]) ])
- Type renvoyé
ParameterView
- Renvoie
The sorted
Parameter
objects in the circuit.
- prefix = 'circuit'¶