Is cryogenic quantum control at the mK stage really possible with superconducting computing? 

Large-scale quantum computers necessitate high-fidelity control and readout of numerous qubits, operating at millikelvin temperatures, which presents a significant input–output bottleneck. Current qubit control relies on classical hardware at room temperature, limiting scalability and control capabilities. To overcome these challenges, control hardware must be tightly integrated with qubits, enabling systematic and more autonomous control for modular scalability. One promising solution involves developing cryogenic control based on superconducting digital computing with logic families like eRSFQ and AQFP, which have previously demonstrated operation at 4K. This work addresses the critical question: Can superconducting classical co-processors for quantum control truly co-exist with the QPU unit at the millikelvin stage, while simultaneously delivering the demanding performance required by the short decoherence time of qubits, all within a power budget of only a few microwatts?