Kryogene photonische Mikrowellengeneration für supraleitende Quantenschaltkreise
KRYOWAVE funded by the BMFTR aims to develop an optically mediated, scalable control platform for superconducting qubits, targeting improved signal quality and gate fidelities, while reducing wiring complexity in systems with hundreds of qubits. It builds on recent advances in superconducting quantum processors and optical frequency-comb technology to tackle wiring density, stability, and power dissipation bottlenecks in cryogenic control.
Kryowave pursues an architecture in which ultra-stable optical signals are converted into lownoise microwave control tones directly at cryogenic temperatures, thereby lowering microwavecable count and thermal load between room temperature electronics and the quantum processor. By combining advanced photonic components with adapted superconducting circuitry, the consortium aims to outperform purely electrical control stacks used in current state-ofthe-art platforms.The project is conducted jointly by the Walther-Meißner-Institut (WMI), Fraunhofer HHI, PeakQuantum GmbH, and Menlo Systems GmbH as the coordinator. It is pooling expertise in superconducting quantum devices and cryogenics (WMI), integrated photonics and high-speedphotodiodes (Fraunhofer HHI), ultra-stable laser and frequency-comb systems (Menlo Systems), and industrial superconducting qubit fabrication (Peak Quantum).
