Feedforward control of electron spin qubits in quantum dots

• Project/Area Number: 18H01819
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 28020:Nanostructural physics-related
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: 中島 峻 国立研究開発法人理化学研究所, 創発物性科学研究センター, 上級研究員 (60534344)
• Co-Investigator(Kenkyū-buntansha): 樽茶 清悟 国立研究開発法人理化学研究所, 創発物性科学研究センター, グループディレクター (40302799)
• Project Period (FY): 2018-04-01 – 2023-03-31
• Project Status: Granted (Fiscal Year 2022)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2020: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
• Keywords: 量子ドット / 電子スピン / 量子ビット / 量子コンピュータ / シリコン / 誤り訂正 / 量子コヒーレンス

Outline of Annual Research Achievements

近年、従来型コンピュータの高速化が限界を迎えつつある中で、新しいパラダイムにより超高速計算を可能にする量子計算機の実現が切望されている。最近、特に集積化に有利とされるシリコン(Si)基板の量子ドットデバイスで高性能な電子スピン量子ビットが実現され、量子計算機実現に向けた機運が高まっている。しかしながら現実の量子ビットには必ずエラーが伴うため、このエラーを検出し訂正する回路の実現が必要である。本課題では、この量子エラー訂正回路を実装する上で必須とされるフィードフォワード制御技術の基盤を確立することを目標としている。

2021年度は、従来のGaAsに比べて高性能なSi電子スピン量子ビットに適用できるよう改良したフィードバック制御システムを利用して、磁気雑音・電気雑音の抑制による位相コヒーレンスの改善及び、量子ビットのアクティブリセット（初期化）の実証実験を進めた。従来のGaAsでは核スピンに由来する極低周波の磁気雑音が支配的であったが、Siではこの効果が低減されることにより電気雑音の効果が相対的に大きい。また、特に２ビットゲート操作時に電気雑音の影響が顕著となることに着目し、フィードバック制御によって２ビット操作時のコヒーレンスを改善することを試みた。当初の狙い通りコヒーレンス時間の一定程度の改善を確認することができたが、その程度は試料の雑音特性や電圧条件に拠るところが大きいことがわかった。またアクティブリセットについても実験を完了し、プロトコルが正常に動作することを確認することができた。現在、これらの実験データの解析と取りまとめを進めている。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

実験は当初の計画通りに進捗し、一連の実験結果を得ることができた。ただし実験の過程で量子ビットの雑音特性を調べる中で、当初予期しなかった量子ビット間の相関が明らかになった。これらの注意深い解析が必要となったため当初の計画から一部を変更して着手することとなったが、全体として概ね順調に進捗しているといえる。

Strategy for Future Research Activity

本研究の進捗に伴い、予期しなかった雑音の相関や従来の期待を上回る量子ビットの高忠実度制御方法が解明されてきた。これらの結果を踏まえ、フィードバック制御に求められる性能や役割も変化していくことになるため、それらを見極めながら長期的な目標を随時再検討していく。

Research Products

• [Int'l Joint Research] Ruhr-University Bochum(ドイツ)
• [Int'l Joint Research] The University of Sydney(オーストラリア)
• [Int'l Joint Research] TUDelft(オランダ)
• [Int'l Joint Research] Ruhr-University Bochum(ドイツ)
• [Int'l Joint Research] Ruhr-University Bochum(ドイツ)
• [Int'l Joint Research] University of Basel(スイス)
• [Int'l Joint Research] Ruhr-University Bochum(ドイツ)
• [Int'l Joint Research] University at Buffalo(米国)
• [Int'l Joint Research] University of Basel(スイス)
• [Journal Article] Fast universal quantum gate above the fault-tolerance threshold in silicon (2022)
  • Author(s): Akito Noiri, Kenta Takeda, Takashi Nakajima, Takashi Kobayashi, Amir Sammak, Giordano Scappucci & Seigo Tarucha
  • Journal Title: Nature Volume: 601 Pages: 338-342
  • DOI: 10.1038/s41586-021-04182-y
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Probabilistic teleportation of a quantum dot spin qubit (2021)
  • Author(s): Y. Kojima, T. Nakajima, A. Noiri, J. Yoneda, T. Otsuka, K. Takeda, S. Li, S. D. Bartlett, A. Ludwig, A. D. Wieck and S. Tarucha
  • Journal Title: npj Quantum Information Volume: - Pages: 68-68
  • DOI: 10.1038/s41534-021-00403-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Quantum tomography of an entangled three-qubit state in silicon (2021)
  • Author(s): Kenta Takeda、Akito Noiri、Takashi Nakajima、Jun Yoneda、Takashi Kobayashi、Seigo Tarucha
  • Journal Title: Nature Nanotechnology Volume: 16 Pages: 965-969
  • DOI: 10.1038/s41565-021-00925-0
  • Peer Reviewed
• [Journal Article] Preparation and Readout of Multielectron High-Spin States in a Gate-Defined GaAs/AlGaAs Quantum Dot (2021)
  • Author(s): H. Kiyama, K. Yoshimi, T. Kato, T. Nakajima, A. Oiwa, and S. Tarucha
  • Journal Title: Physical Review Letters Volume: 127 Pages: 086802-086802
  • DOI: 10.1103/physrevlett.127.086802
  • Peer Reviewed
• [Journal Article] Designs for a two-dimensional Si quantum dot array with spin qubit addressability (2021)
  • Author(s): M. Tadokoro, T. Nakajima, T. Kobayashi, K. Takeda, A. Noiri, K. Tomari, J. Yoneda, S. Tarucha and T. Kodera
  • Journal Title: Scientific Reports Volume: 11 Pages: 19406-19406
  • DOI: 10.1038/s41598-021-98212-4
  • Peer Reviewed / Open Access
• [Journal Article] Gate voltage dependence of noise distribution in radio-frequency reflectometry in gallium arsenide quantum dots (2021)
  • Author(s): Shinozaki Motoya、Muto Yui、Kitada Takahito、Nakajima Takashi、Delbecq Matthieu R.、Yoneda Jun、Takeda Kenta、Noiri Akito、Ito Takumi、Ludwig Arne、Wieck Andreas D.、Tarucha Seigo、Otsuka Tomohiro
  • Journal Title: Applied Physics Express Volume: 14 Pages: 035002-035002
  • DOI: 10.35848/1882-0786/abe41f
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Real-Time Feedback Control of Charge Sensing for Quantum Dot Qubits (2021)
  • Author(s): Nakajima Takashi、Kojima Yohei、Uehara Yoshihiro、Noiri Akito、Takeda Kenta、Kobayashi Takashi、Tarucha Seigo
  • Journal Title: Physical Review Applied Volume: 15
  • DOI: 10.1103/physrevapplied.15.l031003
  • Peer Reviewed / Open Access
• [Journal Article] Radio-Frequency-Detected Fast Charge Sensing in Undoped Silicon Quantum Dots (2020)
  • Author(s): Noiri Akito、Takeda Kenta、Yoneda Jun、Nakajima Takashi、Kodera Tetsuo、Tarucha Seigo
  • Journal Title: Nano Letters Volume: 20 Pages: 947-952
  • DOI: 10.1021/acs.nanolett.9b03847
  • Peer Reviewed
• [Journal Article] Quantum non-demolition readout of an electron spin in silicon (2020)
  • Author(s): Yoneda J.、Takeda K.、Noiri A.、Nakajima T.、Li S.、Kamioka J.、Kodera T.、Tarucha S.
  • Journal Title: Nature Communications Volume: 11 Pages: 1144-1144
  • DOI: 10.1038/s41467-020-14818-8
  • Peer Reviewed / Open Access
• [Journal Article] Coherence of a Driven Electron Spin Qubit Actively Decoupled from Quasistatic Noise (2020)
  • Author(s): Nakajima Takashi、Noiri Akito、Kawasaki Kento、Yoneda Jun、Stano Peter、Amaha Shinichi、Otsuka Tomohiro、Takeda Kenta、Delbecq Matthieu R.、Allison Giles、Ludwig Arne、Wieck Andreas D.、Loss Daniel、Tarucha Seigo
  • Journal Title: Physical Review X Volume: 10 Pages: 011060-011060
  • DOI: 10.1103/physrevx.10.011060
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Resonantly Driven Singlet-Triplet Spin Qubit in Silicon (2020)
  • Author(s): Takeda K.、Noiri A.、Yoneda J.、Nakajima T.、Tarucha S.
  • Journal Title: Physical Review Letters Volume: 124 Pages: 117701-117701
  • DOI: 10.1103/physrevlett.124.117701
  • Peer Reviewed
• [Journal Article] Spin-orbit assisted spin funnels in DC transport through a physically defined pMOS double quantum dot (2019)
  • Author(s): Marian Marx, Jun Yoneda, Tomohiro Otsuka, Kenta Takeda, Yu Yamaoka, Takashi Nakajima, Sen Li, Akito Noiri, Tetsuo Kodera, and Seigo Tarucha
  • Journal Title: Japanese Journal of Applied Physics Volume: 58 Issue: SB Pages: SBBI07-SBBI07
  • DOI: 10.7567/1347-4065/ab01d6
  • NAID: 210000155620
  • ISSN: 0021-4922, 1347-4065
  • Peer Reviewed
• [Journal Article] Quantum non-demolition measurement of an electron spin qubit (2019)
  • Author(s): Takashi Nakajima, Akito Noiri, Jun Yoneda, Matthieu R. Delbecq, Peter Stano, Tomohiro Otsuka, Kenta Takeda, Shinichi Amaha, Giles Allison, Kento Kawasaki, Arne Ludwig, Andreas D. Wieck, Daniel Loss, and Seigo Tarucha
  • Journal Title: Nature Nanotechnology Volume: 未定 Pages: 555-560
  • DOI: 10.1038/s41565-019-0426-x
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Difference in charge and spin dynamics in a quantum dot-lead coupled system (2019)
  • Author(s): Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq, Peter Stano, Shinichi Amaha, Jun Yoneda, Kenta Takeda, Giles Allison, Sen Li, Akito Noiri, Takumi Ito, Daniel Loss, Arne Ludwig, Andreas D. Wieck, and Seigo Tarucha
  • Journal Title: PHYSICAL REVIEW B Volume: 99 Pages: 085402-085402
  • DOI: 10.1103/physrevb.99.085402
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Coherent transfer of electron spin correlations assisted by dephasing noise (2018)
  • Author(s): Takashi Nakajima, Matthieu R. Delbecq, Tomohiro Otsuka, Shinichi Amaha, Jun Yoneda, Akito Noiri, Kenta Takeda, Giles Allison, Arne Ludwig, Andreas D. Wieck, Xuedong Hu, Franco Nori, and Seigo Tarucha
  • Journal Title: NATURE COMMUNICATIONS Volume: 9 Pages: 2133-2133
  • DOI: 10.1038/s41467-018-04544-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Four single-spin Rabi oscillations in a quadruple quantum dot (2018)
  • Author(s): Takumi Ito, Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq, Shinichi Amaha, Jun Yoneda, Kenta Takeda, Akito Noiri, Giles Allison, Arne Ludwig, Andreas D. Wieck, and Seigo Tarucha
  • Journal Title: APPLIED PHYSICS LETTERS Volume: 113 Pages: 093102-093102
  • DOI: 10.1063/1.5040280
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Optimized electrical control of a Si/SiGe spin qubit in the presence of an induced frequency shift (2018)
  • Author(s): K. Takeda, J. Yoneda, T. Otsuka, T. Nakajima, M. R. Delbecq, G. Allison, Y. Hoshi, N. Usami, K. M. Itoh, S. Oda, T. Kodera and S. Tarucha
  • Journal Title: NPJ QUANTUM INFORMATION Volume: 4 Pages: 54-54
  • DOI: 10.1038/s41534-018-0105-z
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A fast quantum interface between different spin qubit encodings (2018)
  • Author(s): Akito Noiri, Takashi Nakajima, Jun Yoneda, Matthieu R. Delbecq, Peter Stano, Tomohiro Otsuka, Kenta Takeda, Shinichi Amaha, Giles Allison, Kento Kawasaki, Arne Ludwig, Andreas D. Wieck, and Seigo Tarucha
  • Journal Title: NATURE COMMUNICATIONS Volume: 9 Pages: 5066-5066
  • DOI: 10.1038/s41467-018-07522-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Siスピン量子ビット測定に適した超伝導増幅器の試作と評価 (2022)
  • Author(s): 小林嵩
  • Organizer: 日本物理学会 第77回年次大会
• [Presentation] シリコン３ビット量子プロセッサーのユニバーサル制御 (2022)
  • Author(s): 中島峻
  • Organizer: 日本物理学会 第77回年次大会
  • Invited
• [Presentation] 半導体電子スピン量子ビットの高速量子状態制御 (2021)
  • Author(s): 中島峻
  • Organizer: 東京大学物性研究所ワークショップ「第２回ナノスケール物性科学の最先端と新展開」
  • Invited
• [Presentation] シリコンスピン量子ビットによる量子情報処理 (2021)
  • Author(s): 中島峻
  • Organizer: 応用物理学会量子情報工学研究会「量子情報工学の最前線」
  • Invited
• [Presentation] Universal quantum gate fidelity exceeding the fault-tolerance threshold in silicon (2021)
  • Author(s): Akito Noiri
  • Organizer: Silicon Quantum Electronics Workshop
  • Int'l Joint Research
• [Presentation] Three-qubit quantum error correction using electron spins in silicon (2021)
  • Author(s): Kenta Takeda
  • Organizer: Silicon Quantum Electronics Workshop
  • Int'l Joint Research
• [Presentation] Quantum measurement and control of silicon spin qubits (2021)
  • Author(s): Takashi Kobayashi
  • Organizer: The 5th Symposium for The Core Research Clusters for Materials Science and Spintronics, and the 4th Symposium on International Joint Graduate Program in Materials Science
  • Int'l Joint Research / Invited
• [Presentation] Shuttling-based controlled-phase gate in silicon (2021)
  • Author(s): Akito Noiri
  • Organizer: 24th International Conference on Electronic Properties of TwoDimensional Systems (EP2DS24)
  • Int'l Joint Research
• [Presentation] Charge noise in Si/SiGe quantum dot spin qubits (2021)
  • Author(s): Rojas-Arias S Juan
  • Organizer: The 11th Workshop on Semiconductor/Superconductor Quantum Coherence Effect and Quantum Information
• [Presentation] Toward autotuning of spin qubits in semiconductor quantum dots (2021)
  • Author(s): Yoshihiro Uehara
  • Organizer: The 11th Workshop on Semiconductor/Superconductor Quantum Coherence Effect and Quantum Information
• [Presentation] Quantum error correction with spins in silicon (2021)
  • Author(s): Kenta Takeda
  • Organizer: The 11th Workshop on Semiconductor/Superconductor Quantum Coherence Effect and Quantum Information
• [Presentation] シリコン3量子ビットプロセッサー(I) (2021)
  • Author(s): 野入亮人
  • Organizer: 日本物理学会第76回年次大会
• [Presentation] シリコン3量子ビットプロセッサー(II) (2021)
  • Author(s): 武田健太
  • Organizer: 日本物理学会第76回年次大会
• [Presentation] スピン量子ビットのための電荷計のフィードバック制御 (2021)
  • Author(s): 上原義裕
  • Organizer: 日本物理学会第76回年次大会
• [Presentation] シリコン量子ドットにおける電子スピン量子非破壊測定 (2020)
  • Author(s): 米田淳
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 量子ドット高周波反射測定のノイズ解析 (2020)
  • Author(s): 篠﨑基矢
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] ベイズ手法による量子ドット電荷状態推定のノイズ依存性 (2020)
  • Author(s): 武藤由依
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 機械学習による量子ドットの電荷状態推定 (2020)
  • Author(s): 中曽拓
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 半導体スピン量子コンピュータとマイクロ波 (2020)
  • Author(s): 中島峻
  • Organizer: IEEE MTT-S Kansai Chapter 「量子技術とマイクロ波」ワークショップ
  • Invited
• [Presentation] Measurement-based active reset of a silicon spin qubit (2020)
  • Author(s): Takashi Kobayashi
  • Organizer: 10th Workshop on semiconductor/superconductor quantum coherence effect and quantum information
  • Int'l Joint Research
• [Presentation] Spatio-temporal correlations of dephasing noise in spin qubits (2020)
  • Author(s): Juan Rojas-Arias
  • Organizer: 10th Workshop on semiconductor/superconductor quantum coherence effect and quantum information
  • Int'l Joint Research
• [Presentation] 量子コンピュータとデータサイエンスの世界 (2020)
  • Author(s): 中島 峻
  • Organizer: 秋田県情報産業協会主催 地域連携セミナー
  • Invited
• [Presentation] 高周波反射測定による電界誘起型シリコン量子ドットの高速電荷検出 (2020)
  • Author(s): 野入 亮人
  • Organizer: 日本物理学会第７5回年次大会
• [Presentation] シリコンスピン量子ビットに対する測定ベースの決定性初期化プロトコル (2020)
  • Author(s): 小林 嵩
  • Organizer: 日本物理学会第７5回年次大会
• [Presentation] Coherent control of a GaAs quantum dot spin qubit operated in a feedback loop (2019)
  • Author(s): T. Nakajima
  • Organizer: Compound Semiconductor Week 2019
  • Int'l Joint Research / Invited
• [Presentation] High-speed Manipulation of Si Qubits (2019)
  • Author(s): S. Tarucha
  • Organizer: 2nd Joint ISTDM / ICSI 2019 Conference
  • Int'l Joint Research / Invited
• [Presentation] Si Platform for Developing Spin-based Quantum Computing (2019)
  • Author(s): S. Tarucha
  • Organizer: 2019 Symposia on VLSI Technology and Circuits
  • Int'l Joint Research / Invited
• [Presentation] 単一電子スピンで視る核スピン浴の揺らぎと相互作用 (2019)
  • Author(s): 中島 峻
  • Organizer: 日本物理学会2019年秋季大会
  • Invited
• [Presentation] Fault tolerant Si based quantum computing (2019)
  • Author(s): S. Tarucha
  • Organizer: Japan-Netherlands Quantum Conference
  • Int'l Joint Research / Invited
• [Presentation] Towards quantum teleportation with quantum-dot spin qubits (2019)
  • Author(s): Y. Kojima
  • Organizer: Compound Semiconductor Week 2019
  • Int'l Joint Research
• [Presentation] Quantum teleportation in a triple quantum dot by utilizing Pauli spin blockade (2019)
  • Author(s): Y. Kojima
  • Organizer: Frontiers in Quantum Information Physics and Technology (Int'l Symposium FQIPT)
  • Int'l Joint Research
• [Presentation] High-fidelity resonant operation of a Si-based singlet-triplet qubit (2019)
  • Author(s): K. Takeda
  • Organizer: Silicon quantum electronics workshop 2019
  • Int'l Joint Research
• [Presentation] Si platform for spin-based quantum computing (2019)
  • Author(s): Seigo Tarucha
  • Organizer: International School of Spintronics and Korea-Japan Spintronics Workshop
  • Int'l Joint Research / Invited
• [Presentation] Micro-magnet Techniques for Implementing Spin-based Quantum Computing with Quantum Dots (2019)
  • Author(s): Seigo Tarucha
  • Organizer: Invitation for Taiwan Quantum Computer Workshop
  • Int'l Joint Research / Invited
• [Presentation] Versatile Spin Control for Spin-based Quantum Computing with Quantum Dots (2019)
  • Author(s): Seigo Tarucha
  • Organizer: Taiwan Quantum Computer Workshop
  • Int'l Joint Research / Invited
• [Presentation] Fast CPHASE and QND using Three Spins in a Triple Quantum Dot (2019)
  • Author(s): Seigo Tarucha
  • Organizer: UTokyo-ANU workshop on Quantum Control and Electronic Materials and Devices
  • Int'l Joint Research / Invited
• [Presentation] Coherent control and dephasing of electron spins in quantum dots (2019)
  • Author(s): Seigo Tarucha
  • Organizer: Electroweak interaction and Unified Theories Mesoscopic Physics
  • Int'l Joint Research / Invited
• [Presentation] Towards quantum teleportation with quantum-dot spin qubits (2019)
  • Author(s): Y. Kojima
  • Organizer: UTokyo-ANU workshop on Quantum Control and Electronic Materials and Devices
  • Int'l Joint Research
• [Presentation] シリコン２重量子ドットにおける位相雑音の交差相関 (2019)
  • Author(s): 米田 淳
  • Organizer: 日本物理学会2019年春季大会
• [Presentation] フィードバック制御による電子スピン量子ビットの操作忠実度の向上 (2019)
  • Author(s): 野入 亮人
  • Organizer: 日本物理学会2019年春季大会
• [Presentation] 微小磁石ESRに用いる局所磁場パラメータの解析 (2019)
  • Author(s): T.Ito
  • Organizer: 日本物理学会2019年春季大会
• [Presentation] 電子スピンの量子テレポーテーションに向けた実験 (2019)
  • Author(s): Y.Kojima
  • Organizer: 日本物理学会2019年春季大会
• [Presentation] Quantum control of spin qubits in different encodings in a triple quantum dot (2018)
  • Author(s): T. Nakajima
  • Organizer: China-Japan International Workshop on Quantum Technologies
  • Int'l Joint Research / Invited
• [Presentation] High-fidelity and scale-up of quantum gates in Sibased quantum computing (2018)
  • Author(s): Seigo Tarucha
  • Organizer: DENMARK AND JAPAN STI SEMINAR QUANTUM TECHNOLOGY CREATING THE FUTURE!
  • Int'l Joint Research / Invited
• [Presentation] Quantum Coherence of Spin Qubits with Limited Coupling to the Environment (2018)
  • Author(s): Seigo Tarucha
  • Organizer: International Symposium on Quantum Computing and Quantum Optics
  • Int'l Joint Research / Invited
• [Presentation] Quantum technology for implementing spin based quantum computing with high fidelity and up scaling of qubits (2018)
  • Author(s): Seigo Tarucha
  • Organizer: The 19th International Symposium on the Physics of Semiconductors and Applications (ISPSA)
  • Int'l Joint Research / Invited
• [Presentation] Control with Triple Quantum Dots: Hybrid Spin Qubit, QND, and Coherent Entanglement Transfer (2018)
  • Author(s): Seigo Tarucha
  • Organizer: 20th ICSNN (International Conference on Superlattices, Nanostructures and Nanodevices)
  • Int'l Joint Research / Invited
• [Presentation] High-fidelity spin manipulation toward fault-tolerant quantum computation (2018)
  • Author(s): Seigo Tarucha
  • Organizer: 10th International School and Conference on Physics and Applications of Spin Phenomena in Solids (PASPS10)
  • Int'l Joint Research / Invited
• [Presentation] QND spin readout and cohorent entanglement transfer with a triple quantum dot (2018)
  • Author(s): Seigo Tarucha
  • Organizer: The international workshop “Quantum Information and Correlation in Quantum Dots”
  • Int'l Joint Research / Invited
• [Presentation] Quantum control of spin qubits in different encodings in a triple quantum dot (2018)
  • Author(s): Seigo Tarucha
  • Organizer: Japan-EU Joint Workshop on Advanced Quantum Technology for Future Innovation
  • Int'l Joint Research / Invited
• [Presentation] Spin control with triple quantum dots: three spin qubits, CPHASE, entanglement transfer, and QND (2018)
  • Author(s): Seigo Tarucha
  • Organizer: 4th School and Conference on Spin-Based Quantum Information Processing
  • Int'l Joint Research / Invited
• [Presentation] 隣り合わないスピン量子ビット間の量子もつれ生成 (2018)
  • Author(s): 中島峻
  • Organizer: 第3回 非ノイマン型情報処理へ向けたデバイス技術分科会
  • Invited
• [Presentation] 量子ドットスピンを用いた量子情報 (2018)
  • Author(s): 樽茶清悟
  • Organizer: 量子エレクトロニクス研究会
  • Invited
• [Presentation] Coherent control of a spin qubit in a frequency-locked loop (2018)
  • Author(s): Takashi Nakajima
  • Organizer: 20th International Conference on Superlattices, Nanostructures and Nanodevices (ICSNN2018)
  • Int'l Joint Research
• [Presentation] Coherent coupling between different spin qubit encodings (2018)
  • Author(s): Akito Noiri
  • Organizer: 20th International Conference on Superlattices, Nanostructures and Nanodevices (ICSNN2018)
  • Int'l Joint Research
• [Presentation] A quantum interface between different spin qubit encodings (2018)
  • Author(s): A. Noiri
  • Organizer: 第8回半導体/超伝導体量子効果と量子情報の夏期研修会
• [Presentation] Cross-correlated noise acting on spins in a silicon double quantum dot (2018)
  • Author(s): 米田 淳
  • Organizer: Silicon quantum electronics workshop 2018
  • Int'l Joint Research
• [Remarks] 隣り合わないスピン量子ビット間の量子もつれ生成に成功
  • URL: http://www.riken.jp/pr/press/2018/20180530_1/
• [Remarks] 半導体量子ビットによるハイブリッド量子計算手法の実証
  • URL: http://www.riken.jp/pr/press/2018/20181129_2/
• [Patent(Industrial Property Rights)] 測定装置、測定方法、製造方法、量子コンピュータ、制御方法、及び、集積回路 (2021)
  • Inventor(s): 中島峻 , 小嶋洋平 , 樽茶清悟
  • Industrial Property Rights Holder: 国立研究開発法人理化学研究所
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2021-013935
  • Filing Date: 2021