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The VQE.run method only takes a quantum_instance of type QuantumInstance or BaseBackend and NOT IBMQBackend. How then can I run VQE experiments on actual IBMQ Backends rather than just locally using a qasm_simulator with the NoiseModel of an IBMQBackend.

glS
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MShakeG
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2 Answers2

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BaseBackend is the abstract base class all backend classes inherit from, so IBMQBackend is actually a BaseBackend.

jyu00
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Please find here a code for using IBM Q backend for VQE.

Note that the code was tested in IBM Quatum Lab at IBM Q website.

provider = IBMQ.load_account() #your IBM Q account
backend = provider.backends(name = 'ibmq_ourense')[0] #getting IBM Q Backend

#connect IBM backend to VQE
vqe_solver = MinimumEigenOptimizer(VQE(quantum_instance = backend))


#solve a problem (qubo is variable with QUBO problem which construction is not a part of this code)
vqe_results = vqe_solver.solve(qubo)
Martin Vesely
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