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The proliferation of quantum computing technologies has fueled the race tobuild a practical quantum computer. The spectrum of the innovation is wide andencompasses many aspects of this technology, such as the qubit, control anddetection mechanism, cryogenic electronics, and system integration. A few ofthose emerging technologies are poised for successful monolithic integration ofcryogenic electronics with the quantum structure where the qubits reside. Inthis work, we present a fully integrated Quantum Processor Unit in which thequantum core is co-located with control and detection circuits on the same diein a commercial 22-nm FD-SOI process from GlobalFoundries. The system describedin this work comprises a two dimensional (2D) 240 qubits array integrated with8 detectors and 32 injectors operating at 3K and inside a two-stageGifford-McMahon cryo-cooler. The power consumption of each detector andinjector is 1mW and 0.27mW, respectively. The control sequence is programmedinto an on-chip pattern generator that acts as a command and control block forall hardware in the Quantum Processor Unit. Using the aforementioned apparatus,we performed a quantum resonant tunneling experiment on two qubits inside the2D qubit array. With supporting lab measurements, we demonstrate thefeasibility of the proposed architecture in scaling-up the existing quantumcore to thousands of qubits.

Monolithic Integration of Quantum Resonant Tunneling Gate on a 22nm FD-SOI CMOS Process