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High-Threshold Fault-Tolerant Quantum Computation with Analog Quantum Error Correction

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/70915

Title: High-Threshold Fault-Tolerant Quantum Computation with Analog Quantum Error Correction
Authors: Fukui, Kosuke Browse this author
Tomita, Akihisa Browse this author →KAKEN DB
Okamoto, Atsushi Browse this author →KAKEN DB
Fujii, Keisuke Browse this author
Keywords: Quantum Physics
Quantum Information
Issue Date: 25-May-2018
Publisher: American Physical Society (APS)
Journal Title: Physical review X
Volume: 8
Issue: 2
Start Page: 021054
Publisher DOI: 10.1103/PhysRevX.8.021054
Abstract: 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.
Rights: ©2018 American Physical Society
https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/70915
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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