search

Qiskit / qiskit-aer

Aer is a high performance simulator for quantum circuits that includes noise models
https://qiskit.github.io/qiskit-aer/
Apache License 2.0
465 stars 354 forks source link

QiskitBackendNotFoundError - Unable to run the backend using BackendEstimator primitive #2085

Open pamulism opened 3 months ago

pamulism commented 3 months ago

Informations

What is the current behavior?

I am trying to run a small quantum circuit and generate the expectation value of an observable using the BackendEstimator primitive by incorporating the noise model from Fake20QV1 backend. Below is a snippet of the ending parts of the code.

.... my_service = QiskitRuntimeService()

backend_fake = Fake20QV1() noise_model = noise.NoiseModel.from_backend(backend_fake)

coupling_map = backend_fake.configuration().coupling_map

basis_gates = noise_model.basis_gates

backend = AerSimulator(noise_model=noise_model, coupling_map=coupling_map, basis_gates=basis_gates)

with Session(backend=backend): sampler = BackendSampler() estimator = BackendEstimator() result1 = sampler.run(qc).result() print(f"Quasi-probability distribution: {result1.quasi_dists[0]}") result2 = estimator.run(qc, observable).result() print(f"Expectation Value : {result2.values[0]}")

Generates an error as shown below: .... 541 self._set_backend_config(name)

QiskitBackendNotFoundError: 'No backend matches the criteria.'

Steps to reproduce the problem

What is the expected behavior?

Suggested solutions

What is the expected behavior?

What is the expected enhancement?