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

Coherent quasiparticltransport via a double quantum antidot

Research Project

Project/Area Number 19K14630
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Hata Tokuro  東京工業大学, 理学院, 助教 (30825005)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Keywords量子ホール効果 / 分数量子ホール効果 / 量子アンチドット / 整数量子ホール効果
Outline of Research at the Start

極めてクリーンな二次元電子系に強磁場を印加すると、分数電荷を準粒子に持つ分数量子ホール効果が現れる。その大きな特徴は、準粒子がエニオン統計で記述されることである。その中でも、非可換な統計性を持つ準粒子を操作することで、従来の量子コンピュータとは異なる仕組みを持つトポロジカル量子コンピュータの実現が近年期待されている。
本研究はその実現に向けた礎を築く実験を行う。具体的には、分数電荷準粒子が閉じ込められた量子アンチドットを二つ実現する。そして、アンチドット間における分数電荷準粒子のコヒーレントな輸送を、電流ゆらぎ測定や粒子数検出などといった技術を用いて実証する。

Outline of Final Research Achievements

In this project, we conducted three experimental studies aimed at coherent manipulation of fractional quasiparticles using two quantum antidots. The first is the establishment of a technique for measuring small currents associated with tunneling through a quantum antidot. The second is the demonstration of double quantum antidots with tunable tunneling coupling in the integner quantum Hall regime. The third is the formation of a quantum antidot using a high-mobility gallium arsenide substrate so that fractional quantum Hall systems can emerge. The first and second experiments were presented at conferences in Japan and abroad and were reported in articles. The third experiment was presented at a conference, and we are currently preparing a paper.

Academic Significance and Societal Importance of the Research Achievements

分数量子ホール系における準粒子はエニオンと呼ばれ、フェルミオン統計やボゾン統計にも従わない。2つのエニオンの交換操作(ブレーディング)を利用することで、トポロジカル量子コンピュータへの応用が期待されている。理論的に、複数の量子アンチドットを利用した交換操作が提案されているが、その実験的な確立はなされていない。本課題では、変調可能なトンネル結合を有する二重量子アンチドットの作製に成功し、さらに分数量子ホール系での単一の量子アンチドットの形成にも成功した。本成果は、分数量子ホール系でのエニオン交換操作に向けた第一歩となるもので学術的意義が高い。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (20 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (13 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Int'l Joint Research] Universite Paris-Saclay(フランス)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Kondo temperature evaluated from linear conductance in magnetic fields2023

    • Author(s)
      Sakano Rui、Hata Tokuro、Motoyama Kaiji、Teratani Yoshimichi、Tsutsumi Kazuhiko、Oguri Akira、Arakawa Tomonori、Ferrier Meydi、Deblock Richard、Eto Mikio、Kobayashi Kensuke
    • Journal Title

      Physical Review B

      Volume: 108 Issue: 20 Pages: 205147-205156

    • DOI

      10.1103/physrevb.108.205147

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tunable tunnel coupling in a double quantum antidot with cotunneling via localized state2023

    • Author(s)
      Hata Tokuro、Sada Kazuhiro、Uchino Tomoki、Endo Daisuke、Akiho Takafumi、Muraki Koji、Fujisawa Toshimasa
    • Journal Title

      Physical Review B

      Volume: 108 Issue: 7 Pages: 075432-075440

    • DOI

      10.1103/physrevb.108.075432

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Three-body correlations in nonlinear response of correlated quantum liquid2021

    • Author(s)
      Tokuro Hata, Yoshimichi Teratani, Tomonori Arakawa, Sanghyun Lee, Meydi Ferrier, Richard Deblock, Rui Sakano, Akira Oguri, and Kensuke Kobayashi
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 1-7

    • DOI

      10.1038/s41467-021-23467-4

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Three-body correlations in nonlinear response of correlated quantum liquid2021

    • Author(s)
      Tokuro Hata, Yoshimichi Teratani, Tomonori Arakawa, Sanghyun Lee, Meydi Ferrier, Richard Deblock, Rui Sakano, Akira Oguri, and Kensuke Kobayashi
    • Journal Title

      Nature Communications

      Volume: 掲載予定

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Field-induced SU(4) to SU(2) Kondo crossover in a half-filling nanotube dot: Spectral and finite-temperature properties2020

    • Author(s)
      Teratani Yoshimichi、Sakano Rui、Hata Tokuro、Arakawa Tomonori、Ferrier Meydi、Kobayashi Kensuke、Oguri Akira
    • Journal Title

      Physical Review B

      Volume: 102 Issue: 16 Pages: 165106

    • DOI

      10.1103/physrevb.102.165106

    • NAID

      120006950816

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020407

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Sensitive current measurement on a quantum antidot with a Corbino-type electrode2019

    • Author(s)
      Hata Tokuro、Uchino Tomoki、Akiho Takafumi、Muraki Koji、Fujisawa Toshimasa
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SG Pages: SGGI03-SGGI03

    • DOI

      10.7567/1347-4065/ab5bb8

    • NAID

      210000157666

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] エアブリッジゲートを用いた整数および分数量子ホール領域における量子アンチドットのクーロン振動2024

    • Author(s)
      秦徳郎,三谷洋貴,秋保貴史,村木康二,藤澤利正
    • Organizer
      日本物理学会 2024年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] スピン近藤効果による量子ドットの電流ノイズの磁場応答の理論と実験2024

    • Author(s)
      阪野塁, 秦徳郎, 本山海司, 荒川智紀, Meydi Ferrier, Richard Deblock, 江藤幹雄, 小林研介, 小栗章
    • Organizer
      日本物理学会 2024年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] カーボンナノチューブ量子ドットの近藤状態における磁場誘起SU(4)-SU(2)クロスオーバーに対する3体的Fermi流体効果II2024

    • Author(s)
      佐伯彰彦, 秦徳郎, 本山海司, 寺谷義道, 阪野累, 荒川智紀, Meydi Ferrier, Richard Deblock, 小林研介, 小栗章
    • Organizer
      日本物理学会 2024年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Theory and Experiment of Current Noise through Kondo Dot under Magnetic Fields2024

    • Author(s)
      R. Sakano, T. Hata. K. Motoyama, Y. Teratani, T. Arakawa, M. Ferrier, R. Deblock, M. Eto, K. Kobayashi, A. Oguri
    • Organizer
      APS March Meeting 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Tunable tunnel-coupling in a double quantum antidot with cotunneling via a localized state2022

    • Author(s)
      T. Hata, K. Sada, T. Uchino, T. Akiho, K. Muraki, and T. Fujisawa
    • Organizer
      International Conference on the Physics of Semiconductors 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Universal Scaling property of Linear Conductance through a Kondo Dot in Magnetic Field and its Application2022

    • Author(s)
      Rui Sakano, Tokuro Hata, Kaiji Motoyama, Yoshimichi Teratani, Yoshihiko Tsutsumi, Meydi Ferrier, Richard Deblock, Mikio Eto, Kensuke Kobayashi, and Akira Oguri
    • Organizer
      29th International Conference on Low Temperature Physics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 局在準位を介したコトンネルによる二重量子アンチドットのトンネル結合制御2022

    • Author(s)
      秦徳郎、佐田和陽、 内野智貴、秋保貴史、村木康二、 藤澤利正
    • Organizer
      日本物理学会 第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Tunable tunnel-coupling in a double quantum antidot with cotunneling via a localized state2022

    • Author(s)
      Tokuro Hata
    • Organizer
      The 11th Workshop on Semiconductor/Superconductor Quantum Coherence Effect and Quantum Information
    • Related Report
      2021 Research-status Report
  • [Presentation] 整数量子ホール領域における二重量子アンチドットの形成2021

    • Author(s)
      秦徳郎、佐田和陽、内野智貴、秋保貴史、村木康二、藤澤利正
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 量子液体における三体相関の実験的検出2021

    • Author(s)
      秦徳郎
    • Organizer
      Online CMT seminars
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] コルビノ型電極による量子アンチドットの微小電流測定2019

    • Author(s)
      秦徳郎、内野智貴、秋保貴史、村木康二、藤澤利正
    • Organizer
      日本物理学会 2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Sensitive current measurement on a quantum antidot with a Corbino-type electrode2019

    • Author(s)
      Tokuro Hata, Tomoki Uchino, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa
    • Organizer
      2019 International Conference of Solid State Devices and Materials
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Low-noise current measurement on a quantum antidot in a Corbino disk2019

    • Author(s)
      Tomoki Uchino, Tokuro Hata, Takafumi Akiho, Koji Muraki, and Toshimasa Fujisawa
    • Organizer
      International Conference on Topological Materials Science 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi