海外有望企業情報QuamCore

有用な耐障害性量子コンピュータの実現には約100万量子ビットが必要とされるが、現在の超伝導量子システムは数百～数千量子ビット規模にとどまっている。QuamCoreは、極低温環境下で動作する独自のデジタル制御技術（SFQ回路）により、制御回路を量子プロセッサ近傍に配置。消費電力を大幅に削減し、配線や発熱の課題を解決することで、単一クライオスタット内で100万量子ビット規模の実現を可能にする。

Useful fault-tolerant quantum computing requires roughly 1 million physical qubits, while today's best superconducting systems sit at hundreds to about 1,000. The bottleneck is control and readout wiring rather than the qubits themselves: conventional systems keep the control electronics at room temperature with about 3 analog microwave cables per qubit entering the cryostat, capping scaling at roughly 5,000 qubits per cryostat because of heat load, interconnect density and crosstalk. QuamCore replaces room-temperature analog control with in-cryogenic digital control based on Single-Flux-Quantum (SFQ) logic, placing local control and readout next to the QPU. The patented controller reduces control power by about 10^9 versus room temperature, allowing the entire controller to operate in the ~100 microwatt regime at 10 millikelvin. At 1M-qubit scale, versus a brute-force approach, this implies roughly 1,000x lower cost (~$1M vs ~$1B), 1,000x smaller footprint (a single 55x52x28 cm cryostat).