A new super-cooled microwave source boosts the scale-up of quantum computers: A newly designed microwave source could replace existing bulky control systems that hinder the scalability of quantum computers

Researchers have developed a circuit that produces the high-quality microwave signals required to control quantum computers while operating at temperatures near absolute zero. This is a key step towards moving the control system closer to the quantum processor, which may make it possible to greatly increase the number of qubits in the processor.