宿非凡,杨钊华

• 1:中国科学院物理研究所北京凝聚态物理国家研究中心

摘要(Abstract)：

超导电路器件是为数不多的具有量子化能级、叠加态和纠缠等量子特性的宏观器件。这种具有宏观量子特性的器件为实现超导量子计算与组建超导量子计算机打下了硬件基础,2019年谷歌和2021年我国中国科技大学相继实现"量子霸权(Quantum supremacy)"极大地增加了人们在近期构建超导量子计算机的信心。了解超导量子计算有利于增加对物理学前沿发展方向的把握,对非物理专业的理工科背景读者开阔思路也有一定的好处。不同于经典的超导物理教材力图全面的特点,本文根据超导量子计算物理特征和理解超导量子计算的知识背景要求介绍超导量子电路的核心物理原理,力图化简计算推导难度,突出物理图景,以期对超导量子计算建立一个原理层面上的简洁物理图像。

关键词(KeyWords)： 约瑟夫森效应;宏观量子效应;超导量子计算;超导量子电路

Abstract:

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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 JM,et al.Quantum supremacy using a programmable superconducting processor[J].Nature,2019,574:505-510.
• [2] 宿非凡，杨钊华，范桁，等.超导量子比特[J].大学物理，2021 40:7-14.SU F F,YANG Z H ,FAN H,et al.Superconducting qubit[J].College Physics,2021,40:7-14.(in Chinese)
• [3] 章立源，超导物理[M].电子工业出版社，1995.
• [4] JOSEPHSON B D.Coupled super conductors[J].Rev.Mod.Phys.,1964,36:216-220.
• [5] JOSEPHSON B D.Supercurrents through barriers[J].Adv.Phys.,1965,14:419-451.
• [6] JOSEPHSONB D.Possible new effects in superconductive tunnelling[J].Phys.Lett.,1962,1:251-253.
• [7] ANDERSON P W,ROWELL J M.Probable observation of the Josephson superconducting tunneling effect[J].Phys.Rev.Lett.,1963,10:230-232.
• [8] ROWELL J M,ANDERSON P W,THOMAS D E.Image of the phonon spectrum in the tunneling characteristic between superconductors[J].Phys.Rev.Lett.,1963,11:334-336.
• [9] LANGENBERG D N,SCALAPINO D J,TAYLOR B N.Josephson-type superconducting tunnel junctions as generators of microwave and submillimeter wave radiation[J].Proc.IEEE,1966,54:560-575.
• [10] SHAPIRO S.Josephson currents in superconducting tunneling:the effect of microwaves and other observations[J].Phys.Rev.Lett.,1963,11:80-82.
• [11] TINKHAM M.Introduction to superconductivity[M].New York:McGraw-Hill,1996.
• [12] 宿非凡，王瑞峰.全铌超导Josephson结的EWB仿真模型[J].大学物理实验，2014,27:3-7.SU F F,WANG R F.EWB simulation model of all niobium superconducting Josephson junction[J].College Physics Experiment,2014,27:3-7.(in Chinese)
• [13] CLARKE J,WILHELM F K.Superconducting quantum bits[J].Nature,2008,453:1031-1042.
• [14] 宿非凡.物理与工程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.The quantization method of superconducting circuit[J].Physics and Engineering,2021,31(3):13-15,21.(in Chinese)
• [15] WILT J,GONG Y,SU FF,et al.Atomically thin Al2O3 films for tunnel junction[J].Phys.Rev.App.,2017,7:064022.
• [16] SU F F,LIU W Y,XU H K,et al.Superconducting phase qubits with shadow-evaporated Josephson junctions[J].Chin.Phys.B,2017,26:060308.
• [17] SU F F,WANG Z T,XU H K,et al.Nb-based Josephson parametric amplifier for superconducting qubit measurement[J].Chin.Phys.B,2019,28:110303.
• [18] XU H K,SONG C,LIU W Y,et al.Coherent population transfer between uncoupled or weakly coupled states in ladder-type superconducting qutrits[J].Nat.Commun.,2016,7:11018.
• [19] LIU W Y,SU F F,XU H K,et al.Negative inductance SQUID qubit operating in a quantum regime[J].Supercond.Sci.Technol.,2018,31:045003.
• [20] ZHENG Y,SONG C,CHEN M C,et al.Solving systems of linear equations with a superconducting quantum processor[J].Phys.Rev.Lett.,2017,118:210504.