A silicon quantum processing unit executes high-fidelity multiqubit circuits, with all time-varying control signals generated by a digitally programmed cryogenic complementary metal–oxide–semiconductor controller and delivered to the low-noise, exchange-only qubit device through a high-density superconducting ribbon cable.

A silicon quantum processing unit executes high-fidelity multiqubit circuits, with all time-varying control signals generated by a digitally programmed cryogenic complementary…

Two demonstrations of silicon-based quantum processors tackle the engineering challenges of building scalable quantum computers.