宿非凡,杨钊华

• 1:中国电子信息产业集团长城实验室
• 2:天津先进技术研究院
• 3:合肥国家实验室
• 4:中国科学院物理研究所

摘要(Abstract)：

约瑟夫森参量放大器是超导量子计算实验的关键，本文介绍其基本物理原理并对约瑟夫森参量放大器的器件物理特征、实现设计、发展变形作一详细的讨论，基于实际的实验经验，给出一套行之有效的约瑟夫森参量放大器最佳工作点的确定方法。本文有助于对超导量子计算感兴趣的读者全面掌握超导量子计算的实验方法与系统组成，同时对极低温信号放大器的设计有一定的参考意义。

关键词(KeyWords)： 约瑟夫森参量放大器;超导量子比特;超导量子计算

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 宿非凡,杨钊华

参考文献(References)：

• [1] ARUTE F,ARYA K,MARTINIS J M,et al.Quantum supremacy using a programmable superconducting processor[J].Nature,2019(574):505-510.
• [2] XIAO M,IPPOLITI M,QUINTANA C,et al.Observation of Time-Crystalline Eigenstate Orderona Quantum Processor[J].2021,ArXiv:2107.13571v2 [quant-ph].
• [3] ZHANG X,JIANG W J.Digital quantum simulation of Floquet symmetry-protected topological phases[J].Nature,2022(607):468-473.
• [4] 宿非凡，杨钊华.超导量子比特谱[J].物理与工程，2021,31(6):73-83,96.SU F F,YANG Z H.Superconducting qubit spectrum[J].Physics and Engineering,2021,31(6):73-83,96.(in Chinese)
• [5] Google Quantum AI.Suppressing quantum errors byscaling asurface code logical qubit[J].2021,ArXiv:2207.06431v1 [quant-ph].
• [6] PETERER M,BADER S,JIN X,et al.Coherence and decay of higher energy levels of a superconducting transmon qubit[J].Phys.Rev.Lett.,2015(114):010501.
• [7] BARENDS R,KELLY J,MEGRANT A,et al.Coherent Josephson qubit suitable for scalable quantum integrated circuits[J].Phys.Rev.Lett.,2013,111:080502.
• [8] DEVORET M H,SCHOELKOPF R J.Superconducting circuits for quantum information:an outlook[J].Science,2013,339:1169-1174.
• [9] WALTER T,KURPIERS P,GASPARINETTI S,et al.Rapid high-fidelity single-shot dispersive readout of superconducting qubits[J].Physical Review Applied,2017,7054020.
• [10] VIJAY R,MACKLIN C,SLICHTER D H,et al.Stabilizing Rabi oscillations in a superconducting qubit using quantum feedback[J].Nature,2012,490:77-80.
• [11] 宿非凡，杨钊华.超导量子比特耦合与测控的物理原理[J].物理与工程，2022,32(4):210-217,228.SU F F,YANG Z H.Principle of superconducting qubits coupling and their measurement and control[J].Physics and Engineering,2022,32(4):210-217,228.(in Chinese)
• [12] MACKLIN C,O'BRIEN K,HOVER D,et al.A near-quantum-limited Josephson traveling-wave parametric amplifier[J].Science,2015,350:6258.
• [13] POZAR D.Microwave engineering[M].2004,Wiley.New Jersey.
• [14] NEELEY M,ANSMANN M,BIALCZAK R C,et al.Transformed dissipation in superconducting quantum circuits[J].Phys.Rev.B,2008,77:180508.
• [15] CLERK A A,DEVORET M H,GIRVIN S M,et al.Introduction to quantum noise,measurement,and amplification[J].Rev.Mod.Phys.,2010,82:1155-1208.
• [16] YURKE B,KAMINSKY P G,MILLER R E,et al.Observation of 4.2-K equilibrium-noise squeezing via a Josephson-parametric amplification[J].Phy.Rev.Lett.,1988,60:764-767.
• [17] 宿非凡，杨钊华.约瑟夫森效应与超导量子电路的基本物理原理[J].物理与工程，2021,31(5):28-33.SU F F,YANG Z H.Josephson effect and the basic physical principles of superconducting quantum circuits[J].Physics and Engineering,2021,31(5):28-33.(in Chinese)
• [18] 宿非凡，杨钊华.超导电路的量子化方法[J].物理与工程，2021,31(3):13-15,21.SU F F,YANG Z H.The quantization method of superconducting circuit[J].Physics and Engineering,2021,31(3):13-15,21.(in Chinese)
• [19] YAMAMOTO T,INOMATA K,WATANABE M,et al.Flux driven josephson parametric amplififier[J].App.phy.Lett.,2008(93):042510.
• [20] SU F F,WANG Z H,XU H K,et al.Nb-based josephson parametric amplififier for superconducting qubit measurement[J].Chin.Phys.B,2019,28:110303.
• [21] LIN Z R,INOMATA K,OLIVER W D,et al.Single-shot readout of a superconducting flux qubit with a flux-driven Josephson parametric amplifier[J].Appl.Phys.Lett.,2013(103):132602.
• [22] MANUCHARYAN V,BOAKNIN E,METCALFE M,et al.Microwave bifurcation of a Josephson junction:Embedding-circuit requirements[J].Phys.Rev.B,2007(76):014524.
• [23] MUTUS J,WHITE T,BAREND Y,et al.Strong environmental coupling in a josephson parametric amplifier[J].App.phy.Lett.,2014(104):263513.
• [24] O'BRIEN K,MACKLIN C,SIDDIQI I.Resonant Phase Matching of Josephson Junction Traveling Wave Parametric Amplifiers[J].Phys.Rev.Lett.,2014(113):157001.
• [25] CHAUDHURI S,GAO J S,IRWIN K.Simulation and analysis of superconducting traveling-wave parametric amplifiers[J].IEEE Transactions on Applied Superconductivity,2015(25):3.
• [26] 宿非凡，杨钊华.实现超导量子比特芯片的微纳加工方法[J].物理与工程，2024,34(2):147-155.SU F F,YANG Z H.Microfabrication methods for realizing superconductingqubit chips[J].Physics and Engineering,2024,34(2):147-155.(in Chinese)