• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study towards complete Bell state measurement of semiconductor electron spin qubits

Research Project

Project/Area Number 18K14079
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 28020:Nanostructural physics-related
Research InstitutionOsaka University

Principal Investigator

Kiyama Haruki  大阪大学, 産業科学研究所, 助教 (80749515)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords量子ドット / 単一スピン計測 / 単一電荷計測 / スピン測定 / 電子スピン / ベル測定
Outline of Final Research Achievements

I worked on multi-valued readout of two-electron spin states in GaAs gate-defined quantum dots towards complete Bell state measurements. Though the multi-valued readout was not realized due to troubles in device fabrication, I successfully demonstrated the ingredients of the multi-valued readout such as high-fidelity binary spin readout. Moreover, I conceived and demonstrated a scheme to improve the fidelity of single-shot spin readout based on Pauli spin blockade. In addition to the latching mechanism that has been already reported, I applied a voltage pulse that makes the excited spin state to a metastable one, which suppresses the readout error due to spin relaxation.
I also achieved the single-electron charge sensing of InAs self-assembled quantum dots, which is the first step towards fast spin manipulation using strong spin-orbit interaction and an efficient photon-spin quantum interface.

Academic Significance and Societal Importance of the Research Achievements

通信に適した光子量子ビットとの親和性の高いIII-V族量子ドットにおいて、電子スピン量子ビットの完全ベル測定を実現することは、量子ドットを量子中継器として用いた長距離量子通信の実現に重要である。本研究ではその基盤技術である多値スピン読み出しに向けて構成要素技術を確立した点に意義がある。また、スピン閉塞効果を用いたスピン読み出しの精度向上手法は、量子計算においても有用であると期待される。
また、InAs量子ドットは強いスピン軌道相互作用による高速スピン操作や、光子との高効率結合が期待されており、単一電荷検出の成功は光-スピン量子インターフェースへの進展が期待される重要な成果である。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (19 results)

All 2020 2019 2018 Other

All Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (14 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results) Remarks (1 results)

  • [Journal Article] Fabrication and optical characterization of photonic crystal nanocavities with electrodes for gate-defined quantum dots2020

    • Author(s)
      Tajiri T.、Sakai Y.、Kuruma K.、Ji S. M.、Kiyama H.、Oiwa A.、Ritzmann J.、Ludwig A.、Wieck A. D.、Ota Y.、Arakawa Y.、Iwamoto S.
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SG Pages: SGGI05-SGGI05

    • DOI

      10.7567/1347-4065/ab5b62

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Angular momentum transfer from photon polarization to an electron spin in a gate-defined quantum dot2019

    • Author(s)
      Fujita Takafumi、Morimoto Kazuhiro、Kiyama Haruki、Allison Giles、Larsson Marcus、Ludwig Arne、Valentin Sascha R.、Wieck Andreas D.、Oiwa Akira、Tarucha Seigo
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1

    • DOI

      10.1038/s41467-019-10939-x

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Single-electron charge sensing in self-assembled quantum dots2018

    • Author(s)
      Haruki Kiyama, Alexander Korsch, Naomi Nagai, Yasushi Kanai, Kazuhiko Matsumoto, Kazuhiko Hirakawa, Akira Oiwa
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1

    • DOI

      10.1038/s41598-018-31268-x

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ポアンカレインターフェース -単一光子偏光から単一電子スピンへの量子インターフェース-2018

    • Author(s)
      大岩顕, 藤田高史, 木山治樹, 黒山和幸, 松尾貞茂, 樽茶清悟
    • Journal Title

      光学

      Volume: 47 Pages: 148-154

    • Related Report
      2018 Research-status Report
  • [Presentation] Conversion of angular momentum, quantum state and entanglement from photons to electron spin using gate-defined quantum dots2020

    • Author(s)
      A. Oiwa, S. Matsuo, K. Kuroyama, C. Y. Chung, R. Fukai, T. Nakagawa, T. Fujita, H. Kiyama, T. Tajiri, S. Iwamoto, A. Ludwig, A. D. Wieck, and S. Tarucha
    • Organizer
      New Perspective in Spin Conversion Science (NPSCS2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 横型量子ドット上に作製した表面プラズモンアンテナの特性評価横型量子ドット上に作製した表面プラズモンアンテナの特性評価鳴2020

    • Author(s)
      深井利央, 酒井裕司, 中川智裕, 藤田高史, 木山治樹, Arne Ludwig, Andreas Dirk Wieck, 大岩顕
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 並列2重InAs自己形成量子ドットトランジスタの作製とその電気伝導特性2020

    • Author(s)
      井手西広樹, 木山治樹, 長井奈緒美, 平川一彦, 大岩顕
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Measurement of multielectron high-spin states and its spin relaxation in a GaAs quantum dot2020

    • Author(s)
      H. Kiyama, K. Yoshimi, T. Kato, T. Nakajima, A. Oiwa, and S. Tarucha
    • Organizer
      New Perspective in Spin Conversion Science (NPSCS2020)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study of the undoped GaAs/AlGaAs mesoscopic structures toward a photon-spin quantum interface utilizing gate-defined quantum dots2020

    • Author(s)
      Genki FUKUDA, Ryota HAYASHI, Takafumi FUJITA, Yasushi KANAI, Makoto KOHDA,Haruki KIYAMA, Julian RITZMANN, Arne LUDWIG, Kazuhiko MATSUMOTO, Junsaku NITTA, Andreas D. WIECK, and Akira OIWA
    • Organizer
      The 23rd SANKEN International Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication and characterization of InAs self-assembled parallel double quantum dots transistor2020

    • Author(s)
      Hiroki Idenishi, Haruki Kiyama, Naomi Nagai,Kazuhiko Hirakawa, Akira Oiwa
    • Organizer
      The 23rd SANKEN International Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication and Optical Characterization of Photonic Crystal Nanocavities with Electrodes for Gate-Defined Quantum Dots2020

    • Author(s)
      T. Tajiri, K. Kuruma, Y. Sakai, H. Kiyama, A. Oiwa, J. Ritzmann, A. Ludwig, A.D. Wieck, Y. Ota, Y. Arakawa, S. Iwamoto
    • Organizer
      52th International Conference on Solid State Devices and Materials (SSDM2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 量子ドット系でのスピン緩和率における電子相関効果の検証2019

    • Author(s)
      吉見一慶, 木山治樹, 大岩顕, 加藤岳生
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ゲート制御量子ドットを含む2次元スラブ型フォトニック結晶の光学・電気的特性の研究2019

    • Author(s)
      酒井裕司, 田尻武義, 車一宏, 木山治樹, 大岩顕, 中島峻, 樽茶清悟, 岩本敏, 荒川泰彦
    • Organizer
      日本物理学会2019年春季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 量子格子模型ソルバーHΦを用いた量子ドット系のスピン緩和率解析ツールの開発2019

    • Author(s)
      吉見一慶, 加藤岳生, 木山治樹, 大岩顕
    • Organizer
      日本物理学会2019年春季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] SiGe自己形成量子ドットの電気伝導に対するサイドゲート効果2019

    • Author(s)
      田中萌, 川口紀俊, 木山治樹, Mario Bamesreiter, Dominique Bougeard, 大岩顕
    • Organizer
      日本物理学会2019年春季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Transport through quantum dots formed in a (110) GaAs quantum well2018

    • Author(s)
      T. Nakagawa, R. Fukai, Y. Sakai, T. Fujita, H. Kiyama, T. Nakajima, J. Ritzmann, A. Ludwig, A. D. Wieck, S. Tarucha, and A. Oiwa
    • Organizer
      4th School and Conference on Spin-Based Quantum Information Processing
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fabrications and transport properties of SiGe self-assembled quantum dots2018

    • Author(s)
      M. Tanaka, K. Kawaguchi, H. Kiyama, M. Bamesreiter, D. Bougeard, A. Oiwa
    • Organizer
      2018 International Conference on Solid State Devices and Materials (SSDM2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Single-electron charge sensing in self-assembled quantum dots2018

    • Author(s)
      Haruki Kiyama, Alexander Korsch, Naomi Nagai, Yasushi Kanai, Kazuhiko Matsumoto, Kazuhiko Hirakawa, Akira Oiwa
    • Organizer
      34th International conference on the physics of semiconductors
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks] 半導体ナノサイズトランジスタへ電子1個が出入りする様子をキャッチ

    • URL

      https://www.sanken.osaka-u.ac.jp/toppage/hot_topics/topics_20180919/

    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi