I am trying to run a circuit on hardware. But I get the following error, which is not really helpful tbh.
TypeError: unsupported operand type(s) for -: 'NoneType' and 'int
It is unclear how to debug this as it only happens on hardware. The circuit runs successfully on the Aer simulator.
The following code I used to send it to the hardware.
# Initialize account.
service = QiskitRuntimeService(channel='ibm_quantum', token='TOKEN')
backend = service.least_busy(operational=True, simulator=False)
#backend = FakeManilaV2()
pm = generate_preset_pass_manager(target=backend.target, optimization_level=1)
isa_circuit = pm.run(qc)
pubs = []
for observable_operator in observable_operators:
isa_obs = observable_operator.apply_layout(isa_circuit.layout)
pubs.append((isa_circuit,isa_obs))
To run it on sim I uncomment the
#backend = FakeManilaV2() and comment the line above it
And send it to the backend as follows:
with Session(backend=backend) as session:
# Submit a request to the Estimator primitive within the session.
estimator = EstimatorV2(mode=session)
estimator.options.resilience_level = 1 # Set options.
job = estimator.run(pubs)
for idx, pub_result in enumerate(job.result()):
print(f"Expectation values for pub {idx}: {pub_result.data.evs}")
