Suppressing quantum errors by scaling a surface code logical qubit.
Suppressing quantum errors by scaling a surface code logical qubit.
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DOI：
10.1038/s41586-022-05434-1
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发表时间：
2023-02
期刊：
影响因子：
64.8
通讯作者：
Zhu, Ningfeng
中科院分区：
文献类型：
--
作者：
Acharya, Rajeev;Aleiner, Igor;Allen, Richard;Andersen, Trond I.;Ansmann, Markus;Arute, Frank;Arya, Kunal;Asfaw, Abraham;Atalaya, Juan;Babbush, Ryan;Bacon, Dave;Bardin, Joseph C.;Basso, Joao;Bengtsson, Andreas;Boixo, Sergio;Bortoli, Gina;Bourassa, Alexandre;Bovaird, Jenna;Brill, Leon;Broughton, Michael;Buckley, Bob B.;Buell, David A.;Burger, Tim;Burkett, Brian;Bushnell, Nicholas;Chen, Yu;Chen, Zijun;Chiaro, Ben;Cogan, Josh;Collins, Roberto;Conner, Paul;Courtney, William;Crook, Alexander L.;Curtin, Ben;Debroy, Dripto M.;Barba, Alexander Del Toro;Demura, Sean;Dunsworth, Andrew;Eppens, Daniel;Erickson, Catherine;Faoro, Lara;Farhi, Edward;Fatemi, Reza;Burgos, Leslie Flores;Forati, Ebrahim;Fowler, Austin G.;Foxen, Brooks;Giang, William;Gidney, Craig;Gilboa, Dar;Giustina, Marissa;Dau, Alejandro Grajales;Gross, Jonathan A.;Habegger, Steve;Hamilton, Michael C.;Harrigan, Matthew P.;Harrington, Sean D.;Higgott, Oscar;Hilton, Jeremy;Hoffmann, Markus;Hong, Sabrina;Huang, Trent;Huff, Ashley;Huggins, William J.;Ioffe, Lev B.;Isakov, Sergei V.;Iveland, Justin;Jeffrey, Evan;Jiang, Zhang;Jones, Cody;Juhas, Pavol;Kafri, Dvir;Kechedzhi, Kostyantyn;Kelly, Julian;Khattar, Tanuj;Khezri, Mostafa;Kieferova, Maria;Kim, Seon;Kitaev, Alexei;Klimov, Paul V.;Klots, Andrey R.;Korotkov, Alexander N.;Kostritsa, Fedor;Kreikebaum, John Mark;Landhuis, David;Laptev, Pavel;Lau, Kim-Ming;Laws, Lily;Lee, Joonho;Lee, Kenny;Lester, Brian J.;Lill, Alexander;Liu, Wayne;Locharla, Aditya;Lucero, Erik;Malone, Fionn D.;Marshall, Jeffrey;Martin, Orion;McClean, Jarrod R.;McCourt, Trevor;McEwen, Matt;Megrant, Anthony;Costa, Bernardo Meurer;Mi, Xiao;Miao, Kevin C.;Mohseni, Masoud;Montazeri, Shirin;Morvan, Alexis;Mount, Emily;Mruczkiewicz, Wojciech;Naaman, Ofer;Neeley, Matthew;Neill, Charles;Nersisyan, Ani;Neven, Hartmut;Newman, Michael;Ng, Jiun How;Nguyen, Anthony;Nguyen, Murray;Niu, Murphy Yuezhen;O'Brien, Thomas E.;Opremcak, Alex;Platt, John;Petukhov, Andre;Potter, Rebecca;Pryadko, Leonid P.;Quintana, Chris;Roushan, Pedram;Rubin, Nicholas C.;Saei, Negar;Sank, Daniel;Sankaragomathi, Kannan;Satzinger, Kevin J.;Schurkus, Henry F.;Schuster, Christopher;Shearn, Michael J.;Shorter, Aaron;Shvarts, Vladimir;Skruzny, Jindra;Smelyanskiy, Vadim;Smith, W. Clarke;Sterling, George;Strain, Doug;Szalay, Marco;Torres, Alfredo;Vidal, Guifre;Villalonga, Benjamin;Heidweiller, Catherine Vollgraff;White, Theodore;Xing, Cheng;Yao, Z. Jamie;Yeh, Ping;Yoo, Juhwan;Young, Grayson;Zalcman, Adam;Zhang, Yaxing;Zhu, Ningfeng
实用的量子计算将远低于用物理量子的错误率，量子误差校正提供了算法，通过在许多物理Qubt中编码逻辑Qubits，以增加物理量子的数量增强了物理错误，引入更多配额也增加了错误源的数量，因此错误的密度必须足够低通过增加代码的逻辑性能。 -5表面代码逻辑量子量子平均比距离3逻辑Qub的合奏，就25个周期和逻辑的逻辑错误概率而言每个周期的误差（（2.914±0.016）％与（3.028±0.023）％）。由单个高能量事件设置（1.6 x 10-7，我们都会准确地对我们的实验进行建模，从而突出了未来系统的最大挑战标记一个实验演示，其中量子误差校正开始随着定量数量的增加而开始提高性能，从而阐明了达到计算所需的逻辑错误率的路径。
一项研究表明，在超导量子处理器上实现的较大表面代码逻辑量增加了误差抑制。
Practical quantum computing will require error rates well below those achievable with physical qubits. Quantum error correction offers a path to algorithmically relevant error rates by encoding logical qubits within many physical qubits, for which increasing the number of physical qubits enhances protection against physical errors. However, introducing more qubits also increases the number of error sources, so the density of errors must be sufficiently low for logical performance to improve with increasing code size. Here we report the measurement of logical qubit performance scaling across several code sizes, and demonstrate that our system of superconducting qubits has sufficient performance to overcome the additional errors from increasing qubit number. We find that our distance-5 surface code logical qubit modestly outperforms an ensemble of distance-3 logical qubits on average, in terms of both logical error probability over 25 cycles and logical error per cycle ((2.914 ± 0.016)% compared to (3.028 ± 0.023)%). To investigate damaging, low-probability error sources, we run a distance-25 repetition code and observe a 1.7 × 10−6 logical error per cycle floor set by a single high-energy event (1.6 × 10−7 excluding this event). We accurately model our experiment, extracting error budgets that highlight the biggest challenges for future systems. These results mark an experimental demonstration in which quantum error correction begins to improve performance with increasing qubit number, illuminating the path to reaching the logical error rates required for computation. A study demonstrating increasing error suppression with larger surface code logical qubits, implemented on a superconducting quantum processor.
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影响因子：
64.8
作者：
Fluhmann, C.;Nguyen, T. L.;Home, J. P.
通讯作者：
Home, J. P.
影响因子：
64.8
作者：
Google Quantum AI
通讯作者：
Google Quantum AI
影响因子：
64.8
作者：
Grimm, A.;Frattini, N. E.;Devoret, M. H.
通讯作者：
Devoret, M. H.
DOI：
10.1088/1464-4266/7/10/021
发表时间：
2005-10-01
期刊：
JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS
影响因子：
--
作者：
Emerson, J;Alicki, R;Zyczkowski, K
通讯作者：
Zyczkowski, K
影响因子：
64.8
作者：
Arute, Frank;Arya, Kunal;Martinis, John M.
通讯作者：
Martinis, John M.