A digitally controlled silicon quantum processing unit

Nature, Published online: 29 July 2026; doi:10.1038/s41586-026-10754-7A 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.