Cryo-CMOS (Cryogenic Complementary Metal-Oxide-Semiconductor) adapts standard CMOS integrated circuits to function reliably at the extreme cold temperatures required by quantum processors. Conventional electronics behave unpredictably near absolute zero, so cryo-CMOS designs account for shifts in transistor behaviour, noise characteristics, and power dissipation that emerge in cryogenic environments.
The technology matters because it addresses one of the most pressing obstacles to scaling quantum computers: the wiring bottleneck. Controlling each qubit individually from room-temperature electronics requires a tangle of cables running into the dilution refrigerator. Cryo-CMOS moves control and readout circuitry onto chips operating alongside the qubits themselves, dramatically reducing wiring complexity and making architectures with thousands or millions of qubits practical.
For silicon-based quantum computing, cryo-CMOS is especially significant. Since, Quantum Motion’s spin qubits are built using CMOS-compatible processes, control electronics and qubits can be integrated, leveraging the existing semiconductor ecosystem to co-fabricate quantum and classical components at scale.