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Impedancemetry of multiplexed quantum devices using an on-chip cryogenic complementary metal-oxide-semiconductor active inductor

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Chip 2023年第4期2卷 133-141页

作者： L.Le Guevel G.Billiot S.De Franceschi A.Morel X.Jehl A.G.M.Jansen *** UniversitéGrenoble Alpes CEALETIGrenoble F-38000France UniversitéGrenoble Alpes CEAGrenoble INPIRIGPHELIQSGrenoble F-38000France Department of Electrical and Computer Engineering University ofMassachusetts-AmherstMA 01003USA UniversitéSavoie Mont Blanc SYMMEAnnecy F-74000France

In the pursuit for scalable quantum processors,significanteffort has been devoted to the development of cryogenic classical hardware for the control and readout of a growingnumber of *** current work presented a novelapproach called impedancemetry that is suitable for measuringthe quantum capacitance of semiconductor qubits connected toa resonant *** impedancemetry circuit exploits theintegration of a complementary metal-oxide-semiconductor(CMOS)active inductor in the resonator with tunable resonance frequency and quality factor,enabling the optimizationof readout sensitivity for quantum *** realized cryogenic circuit allows fast impedance detection with a measuredcapacitance resolution down to 10 aF and an input-referrednoise of 3.7 aF/Hz *** 4.2 K,the power consumption of theactive inductor amounts to 120μW,with an additional dissipation for on-chip current excitation(0.15μW)and voltageamplification(2.9 mW)of the impedance *** to the commonly used schemes based on dispersiveRF reflectometry which require millimeter-scale passive inductors,the circuit exhibits a notably reduced footprint(50μm360μm),facilitating its integration in a scalable quantumclassical *** impedancemetry method has been applied at 4.2 K to the detection of quantum effects in the gatecapacitance of on-chip nanometric CMOS transistors that areindividually addressed via multiplexing.

关键词： Impedancemetry qubit readout Cryogenic circuit Activeinductor CMOS

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Superconducting quantum computing: a review

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Science China(Information Sciences) 2020年第8期63卷 59-90页

作者： He-Liang HUANG Dachao WU Daojin FAN Xiaobo ZHU Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Shanghai Branch CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum PhysicsUniversity of Science and Technology of China

Over the last two decades, tremendous advances have been made for constructing large-scale quantum computers. In particular, quantum computing platforms based on superconducting qubits have become the leading candidate for scalable quantum processor architecture, and the milestone of demonstrating quantum supremacy has been first achieved using 53 superconducting qubits in 2019. In this study, we provide a brief review on the experimental efforts towards the large-scale superconducting quantum computer,including qubit design, quantum control, readout techniques, and the implementations of error correction and quantum algorithms. Besides the state of the art, we finally discuss future perspectives, and which we hope will motivate further research.

关键词： quantum computing superconducting quantum computing quantum bit quantum algorithm qubit design qubit control qubit readout

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