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Fujii Keisuke

藤井 啓祐

Graduate School of Engineering Science Department of Systems Innovation, Professor

Research History

  • 2019/04 - Present, Osaka University, Graduate School of Engineering Science, Professor
  • 2017/10 - 2019/03, Kyoto University, Associate Professor
  • 2016/04 - 2017/09, The University of Tokyo, Photon Science Center, Assistant Professor
  • 2015/04 - 2016/03, Kyoto University, The Hakubi Center for Advanced Research/ Graduate School of Science, Assistant Professor
  • 2013/04 - 2015/03, Kyoto University, The Hakubi Center for Advanced Research/ Graduate School of Informatics, Assistant Professor
  • 2011/04 - 2013/03, Osaka University, Graduate School of Engineering Science, PostDoc

Research Areas

  • Natural sciences, Mathematical physics and basic theory
  • Informatics, Information theory
  • Natural sciences, Semiconductors, optical and atomic physics

Papers

  • A sampling-based quasi-probability simulation for fault-tolerant quantum error correction on the surface codes under coherent noise, Shigeo Hakkaku,Kosuke Mitarai,Keisuke Fujii, arXiv:2105.04478, p. 1-6, 2021/05/10
  • Computational power of one- and two-dimensional dual-unitary quantum circuits, Ryotaro Suzuki, Kosuke Mitarai and Keisuke Fujii, arXiv:2103.09211, p. 1-14, 2021/03/16
  • Learning temporal data with variational quantum recurrent neural network, Yuto Takaki,Kosuke Mitarai,Makoto Negoro,Keisuke Fujii,Masahiro Kitagawa, PHYSICAL REVIEW A, American Physical Society, Vol. 103, No. 5, p. 052414-1-052414-8, 2021/03/13
  • Constructing a virtual two-qubit gate by sampling single-qubit operations, Kosuke Mitarai,Keisuke Fujii, New Journal of Physics, Vol. 23, p. 023021-1-023021-15, 2021/02/12
  • Overhead for simulating a non-local channel with local channels by quasiprobability sampling, Kosuke Mitarai,Keisuke Fujii, Quantum, Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften, Vol. 5, p. 388-1-388-8, 2021/01/28
  • Quantum self-learning Monte Carlo and quantum-inspired Fourier transform sampler, Katsuhiro Endo,Taichi Nakamura,Keisuke Fujii,Naoki Yamamoto, Physical Review Research, American Physical Society (APS), Vol. 2, No. 4, p. 043442-1-043442-11, 2020/12/31
  • Variational Quantum Algorithms, M. Cerezo,Andrew Arrasmith,Ryan Babbush,Simon C. Benjamin,Suguru Endo,Keisuke Fujii,Jarrod R. McClean,Kosuke Mitarai,Xiao Yuan,Lukasz Cincio,Patrick J. Coles, arXiv:2012.09265, p. 1-29, 2020/12/16
  • Variational quantum algorithm for nonequilibrium steady states, Nobuyuki Yoshioka,Yuya O. Nakagawa,Kosuke Mitarai,Keisuke Fujii, Physical Review Research, American Physical Society (APS), Vol. 2, No. 4, p. 043289-1-043289-11, 2020/11/30
  • Qulacs: a fast and versatile quantum circuit simulator for research purpose, Yasunari Suzuki,Yoshiaki Kawase,Yuya Masumura,Yuria Hiraga,Masahiro Nakadai,Jiabao Chen,Ken M. Nakanishi,Kosuke Mitarai,Ryosuke Imai,Shiro Tamiya,Takahiro Yamamoto,Tennin Yan,Toru Kawakubo,Yuya O. Nakagawa,Yohei Ibe,Youyuan Zhang,Hirotsugu Yamashita,Hikaru Yoshimura,Akihiro Hayashi,Keisuke Fujii, arXiv:2011.13524, p. 1-25, 2020/11/27
  • Quadratic Clifford expansion for efficient benchmarking and initialization of variational quantum algorithms, Kosuke Mitarai,Yasunari Suzuki,Wataru Mizukami,Yuya O. Nakagawa,Keisuke Fujii, arXiv:2011.09927, p. 1-8, 2020/11/19
  • Comparative study for sampling-based simulation costs of noisy quantum circuits, Shigeo Hakkaku,Keisuke Fujii, arXiv:2011.06233, p. 1-14, 2020/11/12
  • Quantum reservoir computing: a reservoir approach toward quantum machine learning on near-term quantum devices, Keisuke Fujii,Kohei Nakajima, arXiv:2011.04890, p. 1-13, 2020/11/10
  • Sequential minimal optimization for quantum-classical hybrid algorithms, Ken M. Nakanishi,Keisuke Fujii,Synge Todo, Physical Review Research, American Physical Society (APS), Vol. 2, No. 4, p. 043158-1-043158-11, 2020/10/29
  • Quantum teleportation of physical qubits into logical code-spaces, Yi-Han Luo,Ming-Cheng Chen,Manuel Erhard,Han-Sen Zhong,Dian Wu,Hao-Yang Tang,Qi Zhao,Xi-Lin Wang,Keisuke Fujii,Li Li,Nai-Le Liu,Kae Nemoto,William J. Munro,Chao-Yang Lu,Anton Zeilinger,Jian-Wei Pan, arXiv:2009.06242, p. 1-6, 2020/09/14
  • General framework for constructing fast and near-optimal machine-learning-based decoder of the topological stabilizer codes, Amarsanaa Davaasuren,Yasunari Suzuki,Keisuke Fujii,Masato Koashi, Physical Review Research, Vol. 2, No. 3, p. 033399-1-033399-25, 2020/09/11
  • Optimizing a quantum reservoir computer for time series prediction, Aki Kutvonen,Keisuke Fujii,Takahiro Sagawa, Scientific Reports, Springer Science and Business Media LLC, Vol. 10, No. 1, p. 14687-1-14687-7, 2020/09/07
  • Deep Variational Quantum Eigensolver: a divide-and-conquer method for solving a larger problem with smaller size quantum computers, Keisuke Fujii,Kosuke Mitarai,Wataru Mizukami,Yuya O. Nakagawa, arXiv:2007.10917, p. 1-8, 2020/07/21
  • Overhead of the non-local-to-local channel decomposition by quasiprobability sampling, Kosuke Mitarai,Keisuke Fujii, arXiv:2006.11174, p. 1-7, 2020/06/19
  • Experimental quantum kernel machine learning with nuclear spins in a solid, Takeru Kusumoto,Kosuke Mitarai,Keisuke Fujii,Masahiro Kitagawa,Makoto Negoro, arXiv:1911.12021, p. 1-15, 2019/11/27
  • Subspace-search variational quantum eigensolver for excited states, K. M. Nakanishi,K. Mitarai and K. Fujii, Physical Review Research, Vol. 1, No. 3, p. 033062:1-033062:7, 2019/10
  • Constructing a virtual two-qubit gate from single-qubit operations, K.Fujii,K. Mitarai, arXiv:1909.07534, p. 1-12, 2019/09
  • Methodology for replacing indirect measurements with direct measurements, K. Mitarai,K. Fujii, Physical Review Research, Vol. 1, No. 1, p. 013006:1-013006:7, 2019/08
  • Subspace Variational Quantum Simulator, Kentaro Heya,Ken M Nakanishi,Kosuke Mitarai,Keisuke Fujii, arXiv:1904.08566, p. 1-10, 2019/04/18
  • Generalization of the Output of a Variational Quantum Eigensolver by Parameter Interpolation with a Low-depth Ansatz, Kosuke Mitarai,Tennin Yan,Keisuke Fujii, PHYSICAL REVIEW APPLIED, AMER PHYSICAL SOC, Vol. 11, No. 4, p. 044087-1-044087-9, 2019/04
  • Boosting Computational Power through Spatial Multiplexing in Quantum Reservoir Computing, Kohei Nakajima,Keisuke Fujii,Makoto Negoro,Kosuke Mitarai,Masahiro Kitagawa, PHYSICAL REVIEW APPLIED, AMER PHYSICAL SOC, Vol. 11, No. 3, p. 034021-1-034021-17, 2019/03
  • Quantum analog-digital conversion, Kosuke Mitarai,Masahiro Kitagawa,Keisuke Fujii, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 99, No. 1, p. 012301:1-012301:8, 2019/01
  • Variational Quantum Gate Optimization, Kentaro Heya,Yasunari Suzuki,Yasunobu Nakamura,Keisuke Fujii, arXiv:1810.12745, p. 1-10, 2018/10/30
  • Macromagnetic simulation for reservoir computing utilizing spin-dynamics in magnetic tunnel junctions, T. Furuta,K. Fujii,K. Nakajima,S. Tsunegi,H. Kubota,Y. Suzuki,S. Miwa, Physical Review Applied, Vol. 10, No. 3, p. 034063:1-034063:9, 2018/09/27
  • Quantum circuit learning, K. Mitarai,M. Negoro,M. Kitagawa,K. Fujii, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 98, No. 3, p. 032309:1-032309:6, 2018/09
  • Machine learning with controllable quantum dynamics of a nuclear spin ensemble in a solid, Makoto Negoro,Kosuke Mitarai,Keisuke Fujii,Kohei Nakajima,Masahiro Kitagawa, arXiv:1806.10910, p. 1-5, 2018/06/28
  • High-Threshold Fault-Tolerant Quantum Computation with Analog Quantum Error Correction, Kosuke Fukui,Akihisa Tomita,Atsushi Okamoto,Keisuke Fujii, Physical Review X, American Physical Society, Vol. 8, No. 2, p. 021054:1-021054:12, 2018/05/25
  • Impossibility of Classically Simulating One-Clean-Qubit Model with Multiplicative Error, Keisuke Fujii,Hirotada Kobayashi,Tomoyuki Morimae,Harumichi Nishimura,Shuhei Tamate,Seiichiro Tani, Physical Review Letters, American Physical Society, Vol. 120, No. 20, p. 200502:1-200502:6, 2018/05/17
  • Quantum speedup in stoquastic adiabatic quantum computation, Keisuke Fujii, arXiv:1803.09954, p. 1-9, 2018/03/27
  • Fault-tolerant verifiable blind quantum computing with logical state remote preparation, Yuki Takeuchi,Keisuke Fujii,Tomoyuki Morimae,Nobuyuki Imoto, arXiv:1607.01568, p. 1-16, 2017/11/13
  • Efficient Simulation of Quantum Error Correction Under Coherent Error Based on the Nonunitary Free-Fermionic Formalism, Yasunari Suzuki,Keisuke Fujii,Masato Koashi, PHYSICAL REVIEW LETTERS, AMER PHYSICAL SOC, Vol. 119, No. 19, p. 190503:1-190503:5, 2017/11
  • Verifiable fault tolerance in measurement-based quantum computation, Keisuke Fujii,Masahito Hayashi, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 96, No. 3, p. 030301:1R-030301:6R, 2017/09
  • Harnessing Disordered-Ensemble Quantum Dynamics for Machine Learning, Keisuke Fujii,Kohei Nakajima, PHYSICAL REVIEW APPLIED, AMER PHYSICAL SOC, Vol. 8, No. 2, p. 024030:1-024030:20, 2017/08
  • Power of one nonclean qubit, Tomoyuki Morimae,Keisuke Fujii,Harumichi Nishimura, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 95, No. 4, p. 042336:1-042336:6, 2017/04
  • Commuting quantum circuits and complexity of Ising partition functions, Keisuke Fujii,Tomoyuki Morimae, NEW JOURNAL OF PHYSICS, IOP PUBLISHING LTD, Vol. 19, p. 033003:1-033003:24, 2017/03
  • Noise Threshold of Quantum Supremacy, Keisuke Fujii, arXiv:1610.03632, p. 1-8, 2016/10/12
  • Quantum Merlin-Arthur with noisy channel, Tomoyuki Morimae,Keisuke Fujii,Harumichi Nishimura, arXiv:1608.04829, p. 1-20, 2016/08/17
  • Power of quantum computation with few clean qubits, Keisuke Fujii,Hirotada Kobayashi,Tomoyuki Morimae,Harumichi Nishimura,Shuhei Tamate,Seiichiro Tani, Leibniz International Proceedings in Informatics, LIPIcs, Schloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing, Vol. 55, p. 13:1-13:14, 2016/08/01
  • Computational quantum-classical boundary of noisy commuting quantum circuits, Keisuke Fujii,Shuhei Tamate, SCIENTIFIC REPORTS, NATURE PUBLISHING GROUP, Vol. 6, p. 25598:1-25598:15, 2016/05
  • Blind quantum computation over a collective-noise channel, Yuki Takeuchi,Keisuke Fujii,Rikizo Ikuta,Takashi Yamamoto,Nobuyuki Imoto, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 93, No. 5, p. 052307:1-052307:10, 2016/05
  • Quantum Reservoir Computing -harnessing quantum dynamics for machine learning-, Keisuke Fujii,Kohei Nakajima, IEICE Technical Report, p. 1-4, 2016
  • Quantum Merlin-Arthur with Clifford Arthur, T. Morimae,M. Hayashi,H. Nishimura,K. Fujii, Quantum Information and Computation, Vol. 15, No. 15&16, p. 1420-1430, 2015/10
  • Quantum Computation with Topological Codes: from qubit to topological fault-tolerance, Keisuke Fujii, 2015/04/07
  • Measurement-Free Topological Protection Using Dissipative Feedback, Keisuke Fujii,Makoto Negoro,Nobuyuki Imoto,Masahiro Kitagawa, PHYSICAL REVIEW X, AMER PHYSICAL SOC, Vol. 4, No. 4, p. 041039:1-041039:11, 2014/12
  • Quantum algorithm for an additive approximation of Ising partition functions, Akira Matsuo,Keisuke Fujii,Nobuyuki Imoto, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 90, No. 2, p. 022304:1-22304:16, 2014/08
  • Hardness of Classically Simulating the One-Clean-Qubit Model, Tomoyuki Morimae,Keisuke Fujii,Joseph F. Fitzsimons, PHYSICAL REVIEW LETTERS, AMER PHYSICAL SOC, Vol. 112, No. 13, p. 130502:1-130502:5, 2014/04
  • Fault-tolerant quantum computation and communication on a distributed 2D array of small local systems, K. Fujii,T. Yamamoto,M. Koashi,N. Imoto, ELEVENTH INTERNATIONAL CONFERENCE ON QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTATION (QCMC), AMER INST PHYSICS, Vol. 1633, p. 153-155, 2014
  • Secure Entanglement Distillation for Double-Server Blind Quantum Computation, Tomoyuki Morimae,Keisuke Fujii, PHYSICAL REVIEW LETTERS, AMER PHYSICAL SOC, Vol. 111, No. 2, p. 020502:1-020502:5, 2013/07
  • Quantum information and statistical mechanics: an introduction to frontier, Keisuke Fujii, Interdisciplinary Information Sciences, Vol. 19, No. 1, p. 1-15, 2013/06
  • Blind quantum computation protocol in which Alice only makes measurements, Tomoyuki Morimae,Keisuke Fujii, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 87, No. 5, p. 050301:1R-05030:5R, 2013/05
  • Measurement-based quantum computation on symmetry breaking thermal states, Keisuke Fujii,Yoshifumi Nakata,Masayuki Ohzeki,Mio Murao, Physical Review Letters, Vol. 110, No. 12, p. 120502:1-120502:5, 2013/03/21
  • Duality analysis on random planar lattices, Masayuki Ohzeki,Keisuke Fujii, PHYSICAL REVIEW E, AMER PHYSICAL SOC, Vol. 86, No. 5, p. 051121:1-051121:9, 2012/11
  • Blind topological measurement-based quantum computation, Tomoyuki Morimae,Keisuke Fujii, NATURE COMMUNICATIONS, NATURE PUBLISHING GROUP, Vol. 3, p. 1036:1-1036:6, 2012/09
  • Error and loss tolerances of surface codes with general lattice structures, Keisuke Fujii,Yuuki Tokunaga, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 86, No. 2, p. 020303:1R-020303:5R, 2012/08
  • Not all physical errors can be linear CPTP maps in a correlation space, Tomoyuki Morimae,Keisuke Fujii, SCIENTIFIC REPORTS, NATURE PUBLISHING GROUP, Vol. 2, p. 508:1-508:6, 2012/07
  • Computational power and correlation in a quantum computational tensor network, Keisuke Fujii,Tomoyuki Morimae, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 85, No. 3, p. 032338:1-032338:9, 2012/03
  • A distributed architecture for scalable quantum computation with realistically noisy devices, K. Fujii,T. Yamamoto,M. Koashi,N. Imoto, arXiv:1202.6588, p. 1-11, 2012/02/29
  • Topologically protected measurement-based quantum computation on the thermal state of a nearest-neighbor two-body Hamiltonian with spin-3/2 particles, Keisuke Fujii,Tomoyuki Morimae, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 85, No. 1, p. 010304:1R-010304:5R, 2012/01
  • Robust and scalable scheme to generate large-scale entanglement webs, Keisuke Fujii,Haruki Maeda,Katsuji Yamamoto, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 83, No. 5, 2011/05
  • Topological one-way quantum computation on verified logical cluster states, Keisuke Fujii,Katsuji Yamamoto, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 82, No. 6, p. 060301:1R-060301:4R, 2010/12
  • Fault-Tolerant Topological One-Way Quantum Computation with Probabilistic Two-Qubit Gates, Keisuke Fujii,Yuuki Tokunaga, PHYSICAL REVIEW LETTERS, AMER PHYSICAL SOC, Vol. 105, No. 25, p. 250503:1-250503:4, 2010/12
  • Anti-Zeno effect for quantum transport in disordered systems, Keisuke Fujii,Katsuji Yamamoto, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 82, No. 4, p. 042109:1-042109:5, 2010/10
  • Cluster-based architecture for fault-tolerant quantum computation, Keisuke Fujii,Katsuji Yamamoto, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 81, No. 4, p. 042324:1-042324:14, 2010/04
  • Entanglement purification with double selection, Keisuke Fujii,Katsuji Yamamoto, PHYSICAL REVIEW A, AMER PHYSICAL SOC, Vol. 80, No. 4, p. 042308:1-042308:9, 2009/10
  • Fault-tolerant quantum computation in concatenation of verified cluster states, Keisuke Fujii,Katsuji Yamamoto, QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTING (QCMC), AMER INST PHYSICS, Vol. 1110, p. 141-144, 2009
  • Fault-tolerant Quantum Computation with Highly Verified Logical Cluster States, Keisuke Fujii,Katsuji Yamamoto, arXiv:quant-ph/0611160, p. 1-4, 2006/11

Misc.

  • 量子コンピューターの胎動, 2020/02/17
  • 35歳で阪大教授、藤井さんは量子ブームをどう見る, 2020/02/04
  • Googleが実証を発表した「量子超越性」とは何か, Vol. 2020年, No. 2月号, 2020/02
  • グーグルが作った量子コンピューター, Vol. 2020年, No. 2月号, 2020/02
  • 量子コンピュータを用いた量子超越実験, Vol. 61, No. 3, p. 228-230, 2020/02
  • 量子をめぐるエコシステム (特集 量子コンピュータ : 情報科学技術の新しいパラダイム), Vol. 48, No. 2, p. 8-20, 2020
  • 量子コンピュータを用いた量子超越実験で示されたこと, Vol. 75, No. 3, p. 128-129, 2020
  • 量子コンピュータの現状と可能性, Vol. 72, No. 1, p. 45-50, 2020
  • 計算の物理学と量子力学の計算理論(特集 理論と計算の物理学 : 計算の背景にひそむ論理), Vol. 58, No. 3, p. 59-64, 2020
  • とにかくスパコン超え, 2019/12/17
  • とにかくスパコン超え, 2019/12/16
  • 革命技術生む超速計算, 2019/11/04
  • 「量子超越」社会変革も, 2019/11/04
  • 量子コンピュータを用いた変分アルゴリズムと機械学習, Vol. 74, No. 9, p. 604-611, 2019/09
  • 光の連続性を活用した量子誤り耐性向上手法, Vol. 74, No. 10, p. 720-726, 2019
  • 量子レザバー計算─量子多体実 時間ダイナミクスの機械学習への応用─, Vol. 33, No. 4, 2018/07
  • 量子情報の物理における普遍性, Vol. NO.661, 2018/07
  • 量子コンピューターの基礎, Vol. 63, No. 6, 2018/06
  • 「量子情報におけるミクロ・マクロ自由度の階層性」 ~ミクロな量子操作とマクロな量子情報の葛藤~, Vol. NO.649, 2017/07

Publications

  • 驚異の量子コンピュータ: 宇宙最強マシンへの挑戦, 岩波書店, ISBN:9784000296892, 2019/11
  • 観測に基づく量子計算, コロナ社, ISBN:4339028703, 2017/02
  • Quantum Computation with Topological Codes: From Qubit to Topological Fault-Tolerance (SpringerBriefs in Mathematical Physics Vol.8), Keisuke Fujii, Springer, ISBN:9789812879950, 2015
  • Topological protection of quantum information (in Kinki University Series on Quantum Computing Vol.9 "Physics, Mathematics, and All That Quantum Jazz "), Keisuke Fujii, World Scientific, ISBN:9789814602365, 2014

Awards

  • 科学技術への顕著な貢献2020(ナイスステップな研究者), 2020/12
  • 大阪大学賞(若手教員部門), 2020/11
  • 京都大学総長賞, 2011/03

Presentations

  • NISQ時代の量子コンピューティング, 2021/04/24
  • 量子コンピュータの現状と未来, 2021/04/07
  • The Status and Potential of Quantum Computers: From Quantum Computational Supremacy to Fault-Tolerant Quantum Computer, Keisuke Fujii, 2021/03/29
  • Quantum Computing, Keisuke Fujii, 2021/03/23
  • 知的量子設計による量子ソフトウェア研究開発と応用, 2021/02/22
  • 量子コンピュータ開発の現状と活用の可能性, 2021/01/18
  • NISQ型量子コンピュータを用いた量子機械学習とその応用, 2021/01/07
  • 量子コンピュータの実用化に向けた課題~研究者の立場から~, 2020/12/19
  • 量子コンピューターとソフトウェア, 2020/12/14
  • NISQ型量子コンピュータの量子機械学習への応用, 2020/12/10
  • Acceleration of Classical Simulation of Hamiltonian Dynamics by Simultaneous Diagonalization with Clifford Transformation, Yoshiaki Kawase,Keisuke Fujii, 20th Asian Quantum Information Science Conference, 2020/12/09
  • Nonlinear transformation of complex amplitudes via quantum singular value transformation, Naixu Guo,Kosuke Mitarai,Keisuke Fujii, 20th Asian Quantum Information Science Conference, 2020/12/09
  • Quantum error correction with adaptive syndrome measurements, Shoya Takagi,Kosuke Mitarai,Keisuke Fujii, 20th Asian Quantum Information Science Conference, 2020/12/09
  • Computational power of dual-unitary quantum circuits, Ryotaro Suzuki,Kosuke Mitarai,Keisuke Fujii, 20th Asian Quantum Information Science Conference, 2020/12/09
  • Classically Optimized Variational Quantum Eignensolver for Topological Orderd Systems, Keita Osaki,Kosuke Mitarai,Keisuke Fujii, 20th Asian Quantum Information Science Conference, 2020/12/09
  • Full simulation of fault-tolerant quantum error correction under general noise for near-term quantum devices, Mitsuki Katsuda,Kosuke Mitarai,Keisuke Fujii, 20th Asian Quantum Information Science Conference, 2020/12/09
  • Comparative study for sampling-based simulation costs of noisy quantum circuits, Shigeo Hakkaku,Keisuke Fujii, 20th Asian Quantum Information Science Conference, 2020/12/09
  • Quantum Computing: State of the Art and Prospects, Keisuke Fujii, TENCON2020 IEEE REGION 10 CONFERENCE, 2020/11/18
  • 何がちがう?何が変わる?量子コンピューターと未来社会, 2020/11/16
  • 量子コンピュータの最新技術動向, 2020/11/13
  • 適応的シンドローム測定による反復符号の量子誤り訂正, 2020/10/16
  • 量子コンピューターソフトウェア, 2020/10/15
  • 第三回ポストムーアを考える座談会 〜「量子コンピュータを知り、アーキテクチャを語ろう!」〜, 2020/10/12
  • Applications of Noisy Intermediate-Scale Quantum Computer, Keisuke Fujii, 2020 International Conference on Solid State Devices and Materials, 2020/09/27
  • デュアルユニタリゲートから成る2次元量子ダイナミクスの厳密解, 2020/09/10
  • 量子コンピュータ : 宇宙最強のコンピュータへの挑戦, 2020/02/09
  • State-of-the-art quantum computing technology and quantum software, FUJII Keisuke, Moonshot International Symposium, 2019/12/18
  • Error suppression for adiabatic quantum computation with 2-local Hamiltonian, R. Suzuki,K. Fujii, 2019/12/17
  • Fast quantum circuit simulation for evaluation of quantum error correction, Y. Suzuki,Y. Kawase,K. Fujii, Topical Conference on Quantum Computing 2019, 2019/12/17
  • Methodologies of noisy-intermediate-scale quantum computing for machine learning and quantum simulation, FUJII Keisuke, Topical Conference on Quantum Computing 2019, 2019/12/17
  • シンドローム測定間隔の最適化による量子誤り訂正の改善, 2019/11/18
  • 変分量子回路の古典計算による最適化とトポロジカル秩序系, 2019/11/18
  • 固体NMRを用いたカーネル法による量子機械学習, 2019/11/18
  • GPUを用いた量子ダイナミクスの高速シミュレーション, 2019/11/18
  • 量子リカレントニューラルネットワークによる時系列データ予測, 2019/11/18
  • Error suppression for adiabatic quantum computation with 2-local Hamiltonian, Ryotaro Suzuki,Keisuke Fujii, 2019/11/18
  • 1量子ビット操作による仮想的な2量子ビットゲート, 2019/11/18
  • State-of-the-art Quantum Computing Technology and Its Application for Machine Learning, Keisuke Fujii, The 1st AIRC-ISIR International Symposium, 2019/10/26
  • 量子コンピューター:宇宙最強のコンピューターへの挑戦, 2019/10/24
  • 量子コンピュータが拓く未来, 2019/10/08
  • Methodologies for noisy intermediate-scale quantum (NISQ) computing for machine learning and quantum simulation, Keisuke Fujii, Japan-Netherlands Quantum Conference, 2019/09/16
  • Quantum Information and physics, Keisuke Fujii, TQFT, 2019/09/03
  • NISQ時代の量子コンピューティング, 2019/07/30
  • 量子コンピュータのためのソフトウェア, 2019/07/04
  • NISQ時代の量子コンピューティング : 量子・古典ハイブリッドアルゴリズム, 2019/07/02
  • Applications of noisy-intermediate-scale quantum computing for machine learning and quantum simulation, Keisuke Fujii, AQC2019, 2019/06/27
  • 国内外の研究開発動向と国際戦略、人材育成 、標準化:「量子情報処理領域」(人材育成、拠点形成、産業・イノベーション), 2019/06/14
  • Graph renormalization neural decoder for quantum error correction, Amarsanaa Davaasuren,Yasunari Suzuki,Keisuke Fujii,Masato Koashi,Yasunobu Nakamura, 20th Anniversary of Superconducting Qubits (SQ20th): Progress and Future Directions, 2019/05/14
  • Applications of noisy-intermediate-scale quantum computing for machine learning and quantum simulation, Keisuke Fujii, 20th Anniversary of Superconducting Qubits (SQ20th): Progress and Future Directions, 2019/05/13
  • 量子コンピュータとセキュリティ, 2019/05/09
  • Application of Quantum Computers for Machine Learning and Quantum Chemistry, Keisuke Fujii, ICCMSE 2019, 2019/05/04
  • Quantum computing: current status and prospects, Keisuke Fujii, iTHEMS Colloquium, 2019/04/25
  • NISQ時代の量子コンピューティングと機械学習・量子化学への応用, 2019/04/11
  • NISQ時代の量子コンピューティング, 2019/04/03
  • 量子コンピューティングのチュートリアルレヴュー, 2019/03/26
  • ノイズのあるトロッター展開型量子回路の古典シミュレーション可能性, 2019/03/14
  • High-threshold fualt-tolerant quantum computation with GKP qubits and realistically noisy devices, K. Fukui,A. Tomita,K. Fujii, APS March Meeting 2019, 2019/03/07
  • Graph convolutional network for topological stabilizer codes, Y. Suzuki,A. Davaasuren,K. Fujii,M. Koashi,Y. Nakamura, APS March Meeting 2019, 2019/03/07
  • Subspace-search variational quantum eigensolver for excited states, K. M. Nakanishi,K. Mitarai,K. fujii, APS March Meeting 2019, 2019/03/06
  • パネルディスカッション「量子コンピュータはいつ“もの”になるのか?」, 2019/02/01
  • パネルディスカッション「量子コンピュータ」, 2019/01/30
  • Quantum speedup in stoquastic adiabatic quantum computation, Keisuke Fujii, QIP 2019, 2019/01/14
  • Quantum analog-digital conversion, K. Mitarai,M. Kitagawa,K. Fujii, QIP 2019, 2019/01/14
  • 近未来的に実現される量子デバイスを用いた量子計算, 2018/12/16
  • 量子コンピュータ:宇宙最強のコンピュータへの挑戦, 2018/12/15
  • Panel: Local ecosystems, funding and collaboration opportunities between government, industry, and academia, Keisuke Fujii, Q2B, 2018/12/11
  • 量子アルゴリズム:その仕組みと最近の動向, 2018/11/30
  • 量子デジタル・アナログ変換のためのアルゴリズム, 2018/11/27
  • 励起状態のための変分量子固有部分空間ソルバー, 2018/11/26
  • 現実的ノイズモデルにおける高しきい値連続量耐故障性量子計算, 2018/11/26
  • ノイズのある量子回路の古典サンプリングコストの評価, 2018/11/26
  • ワークショップ「量子消しゴム」, 2018/10/11
  • 量子コンピュータ・物理の面白さ, 2018/10/11
  • 量子コンピュータとトポロジカル物理, 2018/09/26
  • 量子コンピュータの現状と可能性, 2018/09/25
  • 量子コンピュータ入門:基本原理からプログラミング環境まで, 2018/09/15
  • 趣旨説明, 2018/09/11
  • ノイズのある量子回路の古典サンプリングコストの評価, 2018/09/11
  • 量子-古典ハイブリッド学習による量子ゲート勾配最適化の研究, 2018/09/11
  • 機械学習によるトポロジカル表面符号の高速かつ高精度なデコーディング, 2018/09/11
  • Quantum speedup in stoquastic adiabatic quantum computation with non-standard measurements, Keisuke Fujii, AQIS2018, 2018/09/09
  • High-Threshold Fault-Tolerant Quantum Computation with Analog Quantum Error Correction, K. Fukui,A. Tomita,A. Okamoto,K. Fujii, AQIS2018, 2018/09/08
  • 量子コンピューティング×機械学習・量子化学, 2018/08/17
  • stoquastic ハミルトニアンによる断熱量子計算の量子加速, 2018/08/02
  • 量⼦コンピュータの現状と可能性, 2018/07/13
  • Quantum speedup in stochastic adiabatic quantum computation, Keisuke Fujii, Adiabatic Quantum Computing Conference 2018, 2018/06/26
  • 量子コンピュータの可能性とソフトウェア戦略, Keisuke Fujii, Entrepreneur Candidate Club (ECC-iCAP)the place where science & entrepreneurship intersect~科学のフロントランナーが語る未来世界~, 2018/05/25
  • 量子レザバー計算の理論と実装, Keisuke Fujii, 「スピントロニクスの新しい応用」シンポジウム, 2018/05/21
  • Recent theoretical and experimental progress on quantum computing, Keisuke Fujii, 通信情報システム専攻 2018年度 第一回談話会, 2018/04/20
  • 量子コンピュータの開発動向、応用可能性とインパクト, 2018/04/10
  • キタエフ模型の実現と量子コンピュータへの応用, 2018/03/22
  • Macro-magnetic simulation of reservoir computing utilizing spin-dynamics in magnetic tunnel junctions, T. Furuta,K. Fujii,K. Nakajima,S. Tsunegi,H. Kubota,M. Goto,Y. Suzuki,S. Miwa, 2018/03/18
  • 近未来的に実現する量子デバイスを用いた近似量子計算とその応用, 2018/03/18
  • 量子コンピュータへの挑戦―物理・工学・数学の融合領域―, 2018/03/18
  • 基礎から学ぶ量⼦コンピュータ, 2018/02/27
  • 量子コンピューターの研究開発最前線, 2018/02/16
  • Efficient simulation of quantum error correction under coherent error based on non-unitary free-fermionic formalism, Keisuke Fujii, The 2nd International Symposiun on Dynamics in Artificial Quantum Systems, 2018/01/15
  • 量子コンピューターがレグテック革命に参戦!, 2017/12/20
  • 量子コンピュータの可能性の探索, 2017/12/14
  • 量子コンピュータの基礎と物理との接点, 2017/12/04
  • Verifiable fault-tolerance in measurement-based quantum computation, K. Fujii,M. Hayashi, AQIS2017, 2017/09/06
  • Verifiable blind quantum computation with fault-tolerance, Y. Takeuchi,K. Fujii,T. Morimae,N. Imoto, AQIS2017, 2017/09/04
  • 量子コンピュータの基礎と物理との接点, 2017/07/25
  • Quantum Computer Meets Blackhole and Quantum Chaos, 2017/05/26
  • 近未来的に実現される量子デバイスを用いた量子スプレマシー, 2017/05/24
  • 量子情報処理入門-量子力学の情報処理への応用-, 2017/04/18
  • Quantum supremacy in highly mixed state quantum computations, Keisuke Fujii, Quantum Science Symposium Europe – 2016, 2016/11/01
  • Recent progress on quantum information processing, Keisuke Fujii, New Generation Quantum Theory -Particle Physics, Cosmology, and Chemistry-, 2016/03/07
  • 量子計算の基礎と物理との接点, Keisuke Fujii, 京都大学基礎物理学研究所 集中講義, 2015/12/09
  • アナログ・デジタル,古典と量子, Keisuke Fujii, ImPACT 未来開拓研究会, 2015/10/16
  • Interdisciplinary fields between quantum information science and physics, Keisuke Fujii, Okinawa School in Physics 2015: Coherent Quantum Dynamic5, 2015/10/06
  • トポロジカル符号を用いた誤り耐性トポロジカル量子計算, Keisuke Fujii, 離散的手法 による場と時空のダイナミクス研究会 2015, 2015/09/14
  • Measurement-free topological protection with dissipative feedback, Keisuke Fujii, The 10th Principles and Applications of Control in Quantum Systems (PRACQSYS) Workshop 2015, 2015/07/20
  • 量子計算の量子・古典境界:複雑な量子系の実験的検証に向けて, Keisuke Fujii, 基研研究会 量子情報の新時代, 2015/07/15
  • Quantum algorithm for an additive approximation of Ising partition functions, Keisuke Fujii, Workshop on Quantum Computation Complexity, 2015/07/04
  • 量子情報・計算の基礎 I,II, Keisuke Fujii, 2015 Thematic Program on “Fundamental Problems in Quantum Physics; Strings, Black Holes and Quantum Information”, 2015/04/21
  • Instantaneous quantum polynomial time model とイジング分配関数, Keisuke Fujii, 非ユニバーサル量子計算に関する研究会, 2015/03/30
  • Belief propagation in quantum information science: a brief review and possible applications, Keisuke Fujii, Statistical Physics of Disordered Systems and Its Applications, 2015/02/19
  • 量子コンピュータ概論, Keisuke Fujii, 東京工業大学 数理・計算科学特論第九 集中講義, 2015/01/19
  • Measurement-based quantum computation using thermal states of many-body Hamiltonian, Keisuke Fujii, Australia-Japan Workshop on Mutiuser Quantum Networks 2014, 2014/10/22
  • 量子計算の基礎, 2014/08/08
  • 量子は何を計算できるのか?, 2014/08/06
  • 量子計算基礎, Keisuke Fujii, 2014/03/22
  • ダイナミクスにおける量子と古典の境界, 2013/12/08
  • 量子計算と基礎物理, 2013/12/05
  • Measurement-free topological protection using dissipative feedback, Keisuke Fujii, Quantum Science Symposium ASIA-2013 Meeting, 2013/11/26
  • Topological protection of quantum information, Keisuke Fujii, Summer Workshop on "Physics, Mathematics, And All That Quantum Jazz", 2013/08/07
  • Topological quantum computation, Keisuke Fujii, The 11th US-Japan Joint Seminar on Quantum Electronics and Laser Spectroscopy “Ultimate Quantum Systems of Light and Matter -Control and Applications”, 2013/04/04
  • Topologically Protected Measurement-Based Quantum Computation on Symmetry Breaking Thermal States, Keisuke Fujii, Quantum Information via Statistical Mechanics, 2013/01/07
  • 「統計力学と量子情報の接点, 2012/12/15
  • トポロジカルフォールトトレラント量子計算, 2012/05/21
  • 「フォールトトレラント量子計算の基礎–量子計算機はどうあるべきか?–」 &「トポロジカルフォールトトレラント量子計算入門」, 2012/04/19