We were recently talking about Claude Shannon’s information theory, and I recalled reading a nice overview of Shannon and his work in quanta magazine:

https://www.quantamagazine.org/how-claude-shannons-information-theory-invented-the-future-20201222/

When it comes to controlling qubits, we still need classical processors. The trouble is that they heat up the environment and many qubit implementations require extremely low temperatures. This leads to limitations in the number of qubits you can actually work with. Some intriguing news out of Microsoft came out recently about chips that can function at ridiculously low temperatures. Personally, I don’t know enough (for now) about how much of this is realistic versus hyped, but it’s interesting nonetheless:

https://www.microsoft.com/en-us/research/blog/full-stack-ahead-pioneering-quantum-hardware-allows-for-controlling-up-to-thousands-of-qubits-at-cryogenic-temperatures/