Fake Provider
qiskit.providers.fake_provider
Overview
The fake provider module in Qiskit contains fake (simulated) backend classes useful for testing the transpiler and other backend-facing functionality.
Example Usage
Here is an example of using a simulated backend for transpilation and running.
from qiskit import QuantumCircuit, transpile
from qiskit.providers.fake_provider import GenericBackendV2
from qiskit.visualization import plot_histogram
# Generate a 5-qubit simulated backend
backend = GenericBackendV2(num_qubits=5)
# Create a simple circuit
circuit = QuantumCircuit(3)
circuit.h(0)
circuit.cx(0,1)
circuit.cx(0,2)
circuit.measure_all()
circuit.draw('mpl')
# Transpile the ideal circuit to a circuit that can be directly executed by the backend
transpiled_circuit = transpile(circuit, backend)
transpiled_circuit.draw('mpl')
# Run the transpiled circuit using the simulated backend
job = backend.run(transpiled_circuit)
counts = job.result().get_counts()
plot_histogram(counts)
V2 Simulated Backends
GenericBackendV2(num_qubits[, basis_gates, ...]) | Generic BackendV2 implementation with a configurable constructor. |
V1 Fake Backends (Legacy interface)
FakeOpenPulse2Q() | A fake 2 qubit backend for pulse test. |
FakeOpenPulse3Q() | Trivial extension of the FakeOpenPulse2Q. |
Fake1Q() | A fake 1Q backend. |
Fake5QV1() | A fake backend with the following characteristics: |
Fake20QV1() | A fake backend with the following characteristics: |
Fake7QPulseV1() | A fake pulse backend with the following characteristics: |
Fake27QPulseV1() | A fake pulse backend with the following characteristics: |
Fake127QPulseV1() | A fake pulse backend with the following characteristics: |
Fake Backend Base Classes
The V1 fake backends are based on a set of base classes:
FakeBackend
class qiskit.providers.fake_provider.FakeBackend(configuration, time_alive=10)
This is a dummy backend just for testing purposes.
FakeBackend initializer.
Parameters
- configuration (BackendConfiguration) – backend configuration
- time_alive (int) – time to wait before returning result
FakeQasmBackend
class qiskit.providers.fake_provider.FakeQasmBackend
A fake OpenQASM backend.
FakeBackend initializer.
Parameters
- configuration (BackendConfiguration) – backend configuration
- time_alive (int) – time to wait before returning result
FakePulseBackend
class qiskit.providers.fake_provider.FakePulseBackend
A fake pulse backend.
FakeBackend initializer.
Parameters
- configuration (BackendConfiguration) – backend configuration
- time_alive (int) – time to wait before returning result
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