Comment by westurner

What about QPUs though?

Can QPUs (Quantum Processing Units) built on with electrons in superconducting graphene ever be faster than photons in integrated nanophotonics?

There are integrated parametric single-photon emitters and detectors.

Is there a lower cost integrated nanophotonic coherent light source for [quantum] computing than a thin metal wire?

"Electrons turn piece of wire into laser-like light source" (2022) https://news.ycombinator.com/item?id=33493885