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Upgrade backend to BackendV2 #44

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jselig-rigetti opened this issue Jan 2, 2024 · 0 comments

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jselig-rigetti commented Jan 2, 2024 •

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Without this change, the following error occurs when using a live backend with the example from the README:

qiskit.transpiler.exceptions.TranspilerError: 'Number of qubits greater than device.'

This is due to https://github.com/Qiskit/qiskit/blob/main/qiskit/compiler/transpiler.py#L485 not using the direct backend.coupling_map as it would if RigettiQCSBackend were based on BackendV2

A workaround for now is to call execute explicitly with the coupling_map argument like the following, as described in #43

job = execute(circuit, backend, shots=10, coupling_map=backend.coupling_map)

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jselig-rigetti mentioned this issue

fix: README example needs coupling_map defined #43

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