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PhysRevX.8.021054.pdf2.08 MBAdobe PDF見る/開く
タイトル: High-Threshold Fault-Tolerant Quantum Computation with Analog Quantum Error Correction
著者: Fukui, Kosuke
Tomita, Akihisa
Okamoto, Atsushi
Fujii, Keisuke  KAKEN_id
著者名の別形: 福井, 浩介
富田, 章久
岡本, 淳
藤井, 啓祐
キーワード: Quantum Information
発行日: 25-May-2018
出版者: American Physical Society (APS)
誌名: Physical Review X
巻: 8
号: 2
論文番号: 021054
抄録: To implement fault-tolerant quantum computation with continuous variables, the Gottesman-Kitaev-Preskill (GKP) qubit has been recognized as an important technological element. However, it is still challenging to experimentally generate the GKP qubit with the required squeezing level, 14.8 dB, of the existing fault-tolerant quantum computation. To reduce this requirement, we propose a high-threshold fault-tolerant quantum computation with GKP qubits using topologically protected measurement-based quantum computation with the surface code. By harnessing analog information contained in the GKP qubits, we apply analog quantum error correction to the surface code. Furthermore, we develop a method to prevent the squeezing level from decreasing during the construction of the large-scale cluster states for the topologically protected, measurement-based, quantum computation. We numerically show that the required squeezing level can be relaxed to less than 10 dB, which is within the reach of the current experimental technology. Hence, this work can considerably alleviate this experimental requirement and take a step closer to the realization of large-scale quantum computation.
記述: 光による量子コンピュータの実現に大きく迫る手法を開発 --従来の100億倍の誤り耐性--. 京都大学プレスリリース. 2018-05-29.
著作権等: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
URI: http://hdl.handle.net/2433/231252
DOI(出版社版): 10.1103/PhysRevX.8.021054
関連リンク: https://www.kyoto-u.ac.jp/ja/research-news/2018-05-29-2
出現コレクション:学術雑誌掲載論文等

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