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2009 Fiscal Year Self-evaluation Report

Research on detection and manipulation of quantum coherence in quantum dots and wires

Research Project

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Project/Area Number 19104007
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Research Field Condensed matter physics I
Research InstitutionThe University of Tokyo

Principal Investigator

TARUCHA Seigo  The University of Tokyo, 大学院・工学系研究科, 教授 (40302799)

Project Period (FY) 2007 – 2011
Keywords量子ドット / 量子細線 / 量子コヒーレンス / 超伝導接合 / 観測問題
Research Abstract

近年,半導体ナノ構造を用いて量子閉じ込め、相互作用に起因する現象が観測されるようになった。この研究では構造の対称性や電子密度、外部結合などの内部自由度を制御することが功を奏してきた。一方で、個々の量子の性質を積極的に応用しようとする「量子情報」の研究が急速に進展している。その中で、我々は量子細線、ドットの量子現象の制御と検出の研究に関して先駆的な役割を果たしてきた。本研究は、上記研究を発展させて、単一の量子(電荷、スピン)と相関を高精度に制御し、その結果発現する現象を観測・解明、その延長として量子情報の物理と技術に貢献することである。同様な研究の方向は次第に当該分野の主流に成りつつあるが、その大半は量子情報への応用に特化している。本研究は、あくまで固体物理の視点で量子コヒーレンスと相関の物理を探求する。

  • Research Products

    (12 results)

All 2010 2009 2008 2007 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (5 results) Remarks (1 results)

  • [Journal Article] Tunneling Spectroscopy of Andreev Energy Levels in a Quantum Dot Coupled to a Superconductor2010

    • Author(s)
      R. S. Deacon, Y. Tanaka, A. Oiwa, R. Sakano, K. Yoshida, K. Shibata, K. Hirakawa, S. Tarucha
    • Journal Title

      Phys.Rev.Lett. 104

      Pages: 076805-076808

    • Peer Reviewed
  • [Journal Article] Kondo-enhanced Andreev transport in single self-assembled InAs quantum dots contacted with normal and superconducting leads2010

    • Author(s)
      R. S. Deacon, Y. Tanaka, A. Oiwa, R. Sakano, K. Yoshida, K. Shibata, K. Hirakawa, S. Taruch
    • Journal Title

      Phys.Rev.B 81

      Pages: 121308-121311(R)

    • Peer Reviewed
  • [Journal Article] Quantitative estimation of exchange interaction energy using two-electron vertical double quantum dots2009

    • Author(s)
      T. Kodera, K. Ono, Y. Kitamura, Y. Tokura, Y. Arakawa, S. Tarucha
    • Journal Title

      Phys.Rev.Lett. 102

      Pages: 156802-156805

    • Peer Reviewed
  • [Journal Article] Electrically driven single-electron spin resonance in a slanting Zeeman field2008

    • Author(s)
      M. Pioro-Ladriere, T. Obata, Y. Tokura, Y-S. Shin, T. Kubo, K. Yoshida, T. Taniyama, S. Tarucha
    • Journal Title

      Nat.Phys. 4

      Pages: 776-779

    • Peer Reviewed
  • [Journal Article] Large nuclear Overhauser fields detected in vertically coupled double quantum dots2007

    • Author(s)
      J. Baugh, Y. Kitamura, K. Ono, S. Tarucha
    • Journal Title

      Phys.Rev.Lett. 99

      Pages: 096804-096807

    • Peer Reviewed
  • [Journal Article] Noise correlations in a coulomb-blockaded quantum dot2007

    • Author(s)
      Y. Zhang, L. DiCarlo, D. T. McClure, M. Yamamoto, S. Tarucha, C. M. Marcus, M. P. Hanson, A. C. Gossard
    • Journal Title

      Phys.Rev.Lett. 99

      Pages: 036603-036606

    • Peer Reviewed
  • [Presentation] Manipulating single electron spins with micro-magnets2009

    • Author(s)
      M. Pioro-Ladriere, R. Brunner, Y. Tokura, T. Obata, Y.-S. Shin, T. Kubo, K. Yoshida, T. Taniyama, S. Tarucha (Invited)
    • Organizer
      The 18th international Conference on Electronic Properties of Two-Dimensional Systems
    • Place of Presentation
      Kobe Japan
    • Year and Date
      2009-07-24
  • [Presentation] Full control of a flying charge qubit : detection and control of transmission phase shift by Ramsey interference2009

    • Author(s)
      Michihisa Yamamoto, Christopher Bauerle, Seigo Tarucha
    • Organizer
      The 18th international Conference on Electronic Properties of Two-Dimensional Systems
    • Place of Presentation
      Kobe Japan
    • Year and Date
      2009-07-23
  • [Presentation] Detection of optically injected single electron charge and spin in a quantum dot using a quantum point contact2009

    • Author(s)
      H. Kiyama, T. Fujita, G. Allison, T. Asayama, A. Pioda, A. Oiwa, S. Tarucha
    • Organizer
      The 18th international Conference on Electronic Properties of Two-Dimensional Systems
    • Place of Presentation
      Kobe Japan
    • Year and Date
      2009-07-23
  • [Presentation] Gate Voltage Control of a Flying Charge Qubit and Observation of Transmission Phase Shift in an Aharonov-Bohm Ring2009

    • Author(s)
      M. Yamamoto, C. Bauerle, S. Tarucha
    • Organizer
      Frontiers in Nanoscale Science and Technology Workshop
    • Place of Presentation
      Boston USA
    • Year and Date
      2009-05-29
  • [Presentation] Kondo effect and tunneling magnetoresistance in a single self-assembled InAs quantum dot coupled to ferromagnetic leads2007

    • Author(s)
      A. Oiwa, T. Kajiyama, K. Yoshida, K. Hirakawa, S. Tarucha
    • Organizer
      17th International Conference on Electron Properties of 2-Dimensional Systems
    • Place of Presentation
      Genova Italy
    • Year and Date
      2007-07-18
  • [Remarks] ホームページ

    • URL

      http://www.meso.t.u-tokyo.ac.jp/

URL: 

Published: 2011-06-18   Modified: 2016-04-21  

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