yes it's a possibility. Stacking as in have more than 1 chip on some part of the mother board.
and..... we're still thinking of qubits in isolation, there's the nobel prize news that Archer has tweeted.....
Qubits that entangle can do stuff that will turn modern tech on its head. This write up immediately flags entanglement as a feature that can make the probability distributions of a Bell curve inadequate. A big chunk of modern information processing will have to be jettisoned in favour of much more sophisticated algorithms for everything. Whether Tesla wanting exact probabilities of it's self drives crashing, to governments and finance wanting to know if markets,banks,hedge funds will crash....applications are endless. I really can't hazard a guess as to where quantum processing units like a 12CQ will get used.
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