Innovative chip built by UCPH physicists resolves quantum headache

https://science.ku.dk/english/press/news/2021/innovative-chip-built-by-ucph-physicists-resolves-quantum-headache/

"a milestone on the long road to a semiconducting quantum computer... To get more powerful quantum processors, we have to not only increase the number of qubits, but also the number of simultaneous operations, which is exactly what we did... The four spin qubits in the chip are made of the semiconducting material gallium arsenide. Situated between the four qubits is a larger quantum dot that connects the four qubits to each other, and which... tune all of the qubits simultaneously"

A comment appearing on Reddit:

"This looks like another significant milestone in realizing science fiction awesome quantum computing technology and not too very long from now. I bet we see this come into practical use before 2025. The big achievement here, if I am understanding this correctly, is that you need way more qubits in concert and properly controlled and entangled to enable more powerful (quantum) computing than what we have today. Previously these qubits had to corrected individually--a tedious and time consuming process. Now they can, through the use of semi-conductor material chips, be multiply (like a circuit) controlled at once. Something that apparently never has been done before. And soon it is anticipated that computing derived AI can handle this alone without human intervention. It's all pretty complex for the likes of me and I hope I summed that up correctly. But the upshot is that we are well on the road to realizing extraordinarily powerful quantum computing. And pretty soon too I bet."