this post was submitted on 27 Jul 2024
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You're talking the old CPU designs, not the current ones fighting tunneling effects or the work-in-progress photonics & 2D hybrids.
No, I am not sure that I am.
Photonic processing, whilst very cool and super exciting, is not a quantum thing... Maxwells equations are exceedingly classical.
As for the rest it's transistor design optimisation, enabled predominantly by materials science and ASMLs EUV tech I guess:), but still exploits the same underlying 'quantum 1.0' physics.
Spintronics (which could be what you mean by 2D) is for sure in-between (1.5?), leveraging spin for low energy compute.
Quantum 2.0 is systems exploiting entanglement and superposition - i.e. qubits in a QPU (and a few quantum sensing applications).