High-Tc Superconductor Quantum Computer using Intrinsic Josephson Junctions

• Project/Area Number: 18310096
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Microdevices/Nanodevices
• Research Institution: Tohoku University
• Principal Investigator: SATO Shigeo Tohoku University, 電気通信研究所, 准教授 (10282013)
• Co-Investigator(Kenkyū-buntansha): NAKAJIMA Koji 東北大学, 電気通信研究所, 教授 (60125622) ; HAYAKAWA Yoshihiro 東北大学, 電気通信研究所, 助教 (20250847) ; ONOMI Takeshi 東北大学, 電気通信研究所, 助教 (70312676)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥17,050,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥1,950,000); Fiscal Year 2008: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2007: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2006: ¥8,600,000 (Direct Cost: ¥8,600,000)
• Keywords: 量子計算機 / 高温超伝導体 / ジョセフソン接合 / 断熱的量子計算 / Bi-2212 / 量子ビット / ジョセブソン接合 / 巨視的量子トンネル

Research Abstract

高温超伝導体のひとつであるBi-2212高温超伝導体の結晶中に自然に形成される固有ジョセフソン接合を用いた量子計算機実現に向けて研究を行い、マイクロ波照射による量子状態の共鳴励起に成功し、高温超伝導体量子ビットの有効性を示した。また合わせてデコヒーレンス許容型の量子計算アルゴリズムを提案し、その優位性を示した。

Research Products

• [Journal Article] 高温超伝導体における巨視的量子トンネリング (2009)
  • Author(s): 佐藤茂雄
  • Journal Title: 応用物理 78 Pages: 2730-2730
  • NAID: 10023996443
• [Journal Article] (招待記事)高温超伝導体における巨視的量子トンネリング (2009)
  • Author(s): 佐藤茂雄
  • Journal Title: 応用物理(応用物理学会機関誌) 78 Pages: 27-30
• [Journal Article] Macroscopic Quantum Tunneling and Resonant Activation of Current Biased Intrinsic Josephson Junctions in Bi-2212 (2007)
  • Author(s): S. Sato, K. Inomata, M. Kinjo, N. Kitabatake, K. Nakajima, H. B. Wang, T. Hatano
  • Journal Title: IEICE Trans. Electronics E90-C Pages: 599-604
  • NAID: 110007519591
• [Journal Article] Study of macroscopic quantum tunnelling in Bi_2Sr_2CaCu_2O_<8+δ> intrinsic Josephson junctions (2007)
  • Author(s): K. Inomata, S. Sato, M. Kinjo, N. Kitabatake, H. B. Wang, T. Hatano, K. Nakajima
  • Journal Title: Superconductor Science and Technology 20
  • Peer Reviewed
• [Journal Article] Study of macroscopic quantum tunnelling in Bi_2Sr_2CaCu_2O_<8+δ> intrinsic Josephson junctions (2007)
  • Author(s): K.Inomata, et al.
  • Journal Title: SUPERCONDUCTOR SCIENCE AND TECHNOLOGY 20
• [Journal Article] Macroscopic Quantum Tunneling and Resonant Activation of Current Biased Intrinsic Josephson Junctions in Bi-2212 (2007)
  • Author(s): S.Sato, et al.
  • Journal Title: IEICE Trans. Electron. E90-C・3 Pages: 599-603
  • NAID: 110007519591
• [Journal Article] Quantum Neural Network Composed of Kane's Qubits, Jpn (2006)
  • Author(s): Y. Nakamiya, M. Kinjo, O. Takahashi, S. Sato, K. Nakajima
  • Journal Title: Journal of Applied Physics 45 Pages: 8030-8034
  • Peer Reviewed
• [Journal Article] Hardware Implementation of an Inverse Function Delayed Neural Network Using Stochastic Logic, IEICE Trans (2006)
  • Author(s): H. Li, Hogge Li, Y. Hayakawa, S. Sato, K. Nakajima
  • Journal Title: Inf.&Syst E89-D Pages: 2572-2578
  • Peer Reviewed
• [Journal Article] Hardware Implementation of an Inverse Function Delayed Neural Network Using Stochastic Logic (2006)
  • Author(s): H.Li, et al.
  • Journal Title: IEICE Trans. Inf.＆Syst. E89-D・9 Pages: 2572-2578
• [Journal Article] Quantum Neural Network Composed of Kane's Qubits (2006)
  • Author(s): Y.Nakamiya, et al.
  • Journal Title: Jpn. Journal of Applied Physics 45・10A Pages: 8030-8034
• [Presentation] ニューラルネットワークの手法を用いた断熱的量子計算における計算性能のハミルトニアン依存性について (2009)
  • Author(s): 小野亜衣子、他
  • Organizer: 電子情報通信学会総合大会
  • Place of Presentation: 松山
  • Year and Date: 2009-03-20
• [Presentation] (チュートリアル講演)固有ジョセブソン接合の量子特性 (2009)
  • Author(s): 佐藤茂雄、他
  • Organizer: 電子情報通信学会総合大会
  • Place of Presentation: 松山
  • Year and Date: 2009-03-18
• [Presentation] ニューラルネットワークの手法を用いた断熱的量子計算におけるエネルギー準位交差と計算性能の関係 (2008)
  • Author(s): 小野亜衣子、他
  • Organizer: 計測自動制御学会システム・情報部門学術講演会
  • Place of Presentation: 姫路
  • Year and Date: 2008-11-27
• [Presentation] ニューラルネットワークの手法を用いた断熱的量子計算における計算能力に関する考察 (2008)
  • Author(s): 小野亜衣子、他
  • Organizer: 電子情報通信学会非線形問題研究会
  • Place of Presentation: 石巻
  • Year and Date: 2008-10-14
• [Presentation] Study on the Performance of Neuromorphic Adiabatic Quantum Computation Algorithms (2008)
  • Author(s): A. Ono, S. Sato, M. Kinjo, K. Nakajima
  • Organizer: 2008 International Joint Conference on Neural Networks(IJCNN'08)
  • Place of Presentation: Hong Kong
  • Year and Date: 2008-06-05
• [Presentation] Study on the Performance of Neuromorphic Adiabatic Quantum Computation Algorithms (2008)
  • Author(s): Aiko Ono, et.al.
  • Organizer: 2008 International Joint Conference on Neural Networks
  • Place of Presentation: 香港, 中国
  • Year and Date: 2008-06-05
• [Presentation] Si(111)における水素脱離エネルギーの検証 (2008)
  • Author(s): 北野武、他
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 船橋市
  • Year and Date: 2008-03-27
• [Presentation] 固有ジョセフソン接合におけるマルチフォトン励起とその多接合効果について (2008)
  • Author(s): 北畠伸紘、他
  • Organizer: 電子情報通信学会第17回量子情報技術研究会
  • Place of Presentation: 船橋市
  • Year and Date: 2008-03-27
• [Presentation] Resonant activation and multi-junction switching characteristics of Bi-2212 intrinsic Josephson junctions (2008)
  • Author(s): N. Kitabatake, K. Inomata, S. Sato, M. Kinjo, H. Wang, T. Hatano, K. Nakajima
  • Organizer: 2008 APS March Meeting
  • Place of Presentation: New Orleans
  • Year and Date: 2008-03-08
• [Presentation] ニューロ的手法を用いた断熱的量子計算アルゴリズムにおける正答率の検証 (2007)
  • Author(s): 小野亜衣子、他
  • Organizer: 電子情報通信学会第17回量子情報技術研究会
  • Place of Presentation: 岡山市
  • Year and Date: 2007-11-22
• [Presentation] Resonant Activation and Multiple Switching Characteristics of Bi-2212 Intrinsic Josephson Junctions (2007)
  • Author(s): N. Kitabatake, et. al.
  • Organizer: 8th European Conference on Applied Superconductivity
  • Place of Presentation: Brussels
  • Year and Date: 2007-09-19
• [Presentation] Resonant Activation and Multiple Switching Characteristics of Bi-2212 Intrinsic Josephson Junctions (2007)
  • Author(s): N. Kitabatake, K. Inomata, M. Kinjo, S. Sato, K. Nakajima, H.B. Wang, T. Hatano
  • Organizer: Abstracts of 8th European Conference on Applied Superconductivity
  • Place of Presentation: Brussels
  • Year and Date: 2007-09-18
• [Presentation] NH_4F溶液によるSi平坦化とSTM単原子リソグラフィー (2007)
  • Author(s): 北野武、他
  • Organizer: 第68回応用物理学会学術講演会
  • Place of Presentation: 札幌市
  • Year and Date: 2007-09-08
• [Presentation] ニューロ的手法を用いた断熱的量子計算アルゴリズムにおける残留エネルギーの変化 (2007)
  • Author(s): 小野亜衣子、他
  • Organizer: 電子情報通信学会第16回量子情報技術研究会
  • Place of Presentation: 厚木市
  • Year and Date: 2007-05-18
• [Presentation] Study of Macroscopic Quantum Tunneling in Bi_2Sr_2CaCu_2O_<8+δ> Intrinsic Josephson Junctions (2006)
  • Author(s): K. Inomata, S. Sato, M. Kinjo, Y. Nakamiya, N .Kitabatake, H. Wang, T. Hatano, K. Nakajima
  • Organizer: 5th Int. Symp. Intrinsic Josephson Effect in High Tc Superconductors(Plasma 2006)
  • Place of Presentation: London
  • Year and Date: 2006-07-18
• [Presentation] A Study on Learning with a Quantum Neural Network (2006)
  • Author(s): M. Kinjo, S. Sato, K. Nakajima
  • Organizer: 2006 International Joint Conference on Neural Networks(IJCNN'06)
  • Place of Presentation: Vancouver
  • Year and Date: 2006-07-17
• [Presentation] Observation of Macroscopic Quantum Tunneling in Bi_2Sr_2CaCu_2O_<8+δ> Intrinsic Josephson Junctions (2006)
  • Author(s): K. Inomata, S. Sato, M. Kinjo, Y. Nakamiya, N. Kitabatake, H. Wang, T. Hatano, K. Nakajima
  • Organizer: The 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors(M2S-HTSC-VIII)
  • Place of Presentation: Dresden
  • Year and Date: 2006-07-13
• [Book] Complex-Valued Neural Networks : Utilizing High-Dimensional Parameters (2009)
  • Author(s): S. Sato, M. Kinjo
  • Publisher: Information Science Reference
• [Book] Complex-Valued Neural Networks : Utilizing High-Dimensional Parameters (2009)
  • Author(s): Shigeo Sato, et.al.
  • Total Pages: 504
  • Publisher: Information Science Reference
• [Remarks]
  • URL: http://www.nakajima.riec.tohoku.ac.jp
• [Remarks]
  • URL: http://www.nakajima.riec.tohoku.ac.jp
• [Remarks]
  • URL: http://www.nakajima.riec.tohoku.ac.jp