> The paper deals in "resonance", "coupling", "filter" and "attenuator"; it reads like the description of a superheterodyne transceiver; analog RF.
This is the scaffolding for measuring and manipulating quantum states. Quantum computing itself is not "analog" in the original, signal processing meaning of the word: the states are not isomorphic analogies for modelled physical processes.
It's true that qubit states are inherently quantized. However, the control circuitry, couplers or gates, and often the qubits themselves, are analog devices. The "un-sexy" truth is that calibration is one of the most difficult parts of producing a useful quantum computer.
Sure, and any PC has tons of analog circuits too, for example speaker output. The calibration and scaffolding in quantum computers isn't a model of anything. Not in the same way as opamp board in this article is an analogy of integral.
This is the scaffolding for measuring and manipulating quantum states. Quantum computing itself is not "analog" in the original, signal processing meaning of the word: the states are not isomorphic analogies for modelled physical processes.