Semiconductor-Quantum-Dot Modulator for Cryogenic Operation of Quantum Circuitry

Quantum computing devices have the potential to solve problems that are beyond even the most powerful modern supercomputers. Most quantum hardware operates at temperatures near absolute zero, but controlling a quantum computer at cryogenic temperatures using signals propagating from room temperature becomes infeasible for large-scale processors. The authors explore a device that allows control signals to be generated on-chip at cryogenic temperatures, potentially mitigating this cryogenic bottleneck. Their device is fabricated in silicon using established technologies for quantum processors, providing a pathway towards a hybrid quantum-classical integrated circuit.