IBM talks about a metric called "quantum volume" that combines number of qubits with error rate to summarise useful computing performance. See https://dal.objec

IBM talks about a metric called "quantum volume" that combines number of qubits with error rate to summarise useful computing performance. See https://dal.objectstorage.open.softlayer.com/v1/AUTH_039c3bf6e6e54d76b8e66152e2f87877/community-documents/quatnum-volumehp08co1vbo0cc8fr.pdf https://dal.objectstorage.open.softlayer.com/v1/AUTH_039c3bf... (disclosure: IBMer, but very different area)