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An analysis of the spin-dependent electron transport in open quantum systems by using many-electron scattering eigenstates

Research Project

Project/Area Number 23740301
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionKanagawa University (2012-2013)
Kanagawa Institute of Technology (2011)

Principal Investigator

NISHINO Akinori  神奈川大学, 工学部, 准教授 (00466848)

Project Period (FY) 2011 – 2013
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords量子ドット / 量子輸送 / 開放量子系 / 散乱状態 / 厳密解 / 共鳴状態 / 電流電圧特性 / 負性微分伝導度 / 多体束縛状態 / 量子干渉 / 非平衡定常状態
Research Abstract

We investigate the transport properties and the resonant phenomena in open quantum-dot systems by constructing exact many-electron scattering eigenstates. First, we study a parallel-coupled double quantum-dot system and obtain the exact two-electron scattering eigenstates. We find that, as a result of the Coulomb interactions, two-body bound states appear in the scattering states. We also find that the two-body bound states are interpreted as pairs of the resonant states and the anti-resonant states. Next, we study the electron transport in the systems described by the interacting resonant-level models. By using an extension of the Landauer formula, we calculate the average electric current for the system under bias voltages in the first order of the interaction parameters. We observe the suppression of the electric current for large bias voltages, i.e., negative differential conductance, and the restoration of the suppressed electric current due to the asymmetry of the systems.

Report

(4 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • 2011 Research-status Report
  • Research Products

    (25 results)

All 2013 2012 2011 Other

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (21 results) (of which Invited: 2 results) Remarks (2 results)

  • [Journal Article] 量子散乱状態とメゾスコピック系の電気伝導2012

    • Author(s)
      西野晃徳
    • Journal Title

      神奈川大学工学研究所所報

      Volume: Vol.35 Pages: 20-29

    • NAID

      120006940690

    • Related Report
      2013 Final Research Report 2012 Research-status Report
  • [Journal Article] Exact many-electron scattering states in a parallel-coupled double quantum-dot system2012

    • Author(s)
      Akinori Nishino
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 343 Pages: 12087-12087

    • DOI

      10.1088/1742-6596/343/1/012087

    • Related Report
      2013 Final Research Report 2011 Research-status Report
    • Peer Reviewed
  • [Presentation] 非対称相互作用を持つ開放型量子ドットのIV特性2013

    • Author(s)
      西野晃徳, 羽田野直道, Gonzalo Ordonez
    • Organizer
      日本物理学会2013年秋季大会
    • Place of Presentation
      徳島大学
    • Year and Date
      2013-09-27
    • Related Report
      2013 Final Research Report
  • [Presentation] IV characteristics of open quantum-dot systems with asymmetric interactions2013

    • Author(s)
      Akinori Nishino
    • Organizer
      Mathematical Statistical Physics, Yukawa Institute of Theoretical Physics
    • Place of Presentation
      Kyoto University, Kyoto, Japan
    • Year and Date
      2013-09-02
    • Related Report
      2013 Final Research Report
  • [Presentation] Many-body resonances in double quantum-dot systems2013

    • Author(s)
      Akinori Nishino
    • Organizer
      STATPHYS25
    • Place of Presentation
      Seoul National University, Seoul, Korea
    • Year and Date
      2013-07-25
    • Related Report
      2013 Final Research Report
  • [Presentation] 開放型二重量子ドットにおける多体束縛状態と多体共鳴2013

    • Author(s)
      西野晃徳, 羽田野直道, Gonzalo Ordonez
    • Organizer
      日本物理学会第68回年次大会
    • Place of Presentation
      広島大学
    • Year and Date
      2013-03-27
    • Related Report
      2013 Final Research Report
  • [Presentation] Many-body resonance in double quantum-dot systems2012

    • Author(s)
      Akinori Nishino
    • Organizer
      Resonances and Non-Hermitian Systems in Quantum Mechanics, Yukawa Institute of Theoretical Physics
    • Place of Presentation
      Kyoto University, Kyoto, Japan
    • Year and Date
      2012-12-12
    • Related Report
      2013 Final Research Report
  • [Presentation] Exact scattering eigenstates of double quantum-dot systems with an interdot Coulomb interaction2012

    • Author(s)
      Akinori Nishino
    • Organizer
      Novel Development of Statistical Physics
    • Place of Presentation
      The University of Tokyo, Tokyo, Japan
    • Year and Date
      2012-12-04
    • Related Report
      2013 Final Research Report
  • [Presentation] Exact scattering eigenstates of double quantum-dot systems with an interdot Coulomb interaction2012

    • Author(s)
      Akinori Nishino
    • Organizer
      International Workshop on Cooperative Quantum Dynamics and Its Control, Juelich Supercomputing Centre
    • Place of Presentation
      Juelich, Germany
    • Year and Date
      2012-10-29
    • Related Report
      2013 Final Research Report
  • [Presentation] 二重量子ドットの多電子散乱状態の厳密解2012

    • Author(s)
      西野晃徳, 羽田野直道
    • Organizer
      日本物理学会2012年秋季大会
    • Place of Presentation
      横浜国立大学
    • Year and Date
      2012-09-21
    • Related Report
      2013 Final Research Report
  • [Presentation] 並列二重量子ドットの同時占有率 : 多電子散乱状態による解析2012

    • Author(s)
      西野晃徳, 今村卓史, 羽田野直道
    • Organizer
      日本物理学会第67回年次大会
    • Place of Presentation
      関西学院大学
    • Year and Date
      2012-03-27
    • Related Report
      2013 Final Research Report
  • [Presentation] 並列二重量子ドットの同時占有率:多電子散乱状態による解析2012

    • Author(s)
      西野晃徳
    • Organizer
      日本物理学会第67回年次大会
    • Place of Presentation
      関西学院大学(兵庫県)
    • Related Report
      2011 Research-status Report
  • [Presentation] Exact many-electron scattering states of an open quantum dot and an extension of the Landauer formula2011

    • Author(s)
      Akinori Nishino
    • Organizer
      Quantum Theory and Symmetries 7
    • Place of Presentation
      Bethlehem Chapel and Czech Technical University, Prague, Czech Republic
    • Year and Date
      2011-08-12
    • Related Report
      2013 Final Research Report
  • [Presentation] Exact many-electron scattering states of an open quantum dot and an extension of the Landauer formula2011

    • Author(s)
      Akinori Nishino
    • Organizer
      Quantum Theory and Symmetries 7
    • Place of Presentation
      Prague, Czech Republic
    • Related Report
      2011 Research-status Report
  • [Presentation] Exact many-electron scattering states in a parallel-coupled double quantum dot system2011

    • Author(s)
      Akinori Nishino
    • Organizer
      International Workshop on Simulation and Manipulation of Quantum Systems for Information Processing(招待講演)
    • Place of Presentation
      Juelich, Germany
    • Related Report
      2011 Research-status Report
  • [Presentation] Many-body resonances in double quantum-dot systems

    • Author(s)
      Akinori Nishino, Naomichi Hatano, Gonzalo Ordonez
    • Organizer
      STATPHYS25
    • Place of Presentation
      Seoul National University, Seoul, Korea
    • Related Report
      2013 Annual Research Report
  • [Presentation] I-V characteristics of open quantum-dot systems with asymmetric interactions

    • Author(s)
      Akinori Nishino, Naomichi Hatano, Gonzalo Ordonez
    • Organizer
      Mathematical Statistical Physics
    • Place of Presentation
      Yukawa Institute of Theoretical Physics, Kyoto University, Kyoto
    • Related Report
      2013 Annual Research Report
  • [Presentation] 非対称相互作用を持つ開放型量子ドットのIV特性

    • Author(s)
      西野晃徳,羽田野直道,Gonzalo Ordonez
    • Organizer
      日本物理学会2013年秋季大会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] Exact scattering eigenstates of double quantum-dot systems with an interdot Coulomb interaction

    • Author(s)
      Akinori Nishino
    • Organizer
      International Workshop on Cooperative Quantum Dynamics and Its Control
    • Place of Presentation
      Juelich Supercomputing Centre, Germany
    • Related Report
      2012 Research-status Report
  • [Presentation] Exact scattering eigenstates of double quantum-dot systems with an interdot Coulomb interaction

    • Author(s)
      Akinori Nishino
    • Organizer
      Novel Development of Statistical Physics
    • Place of Presentation
      東京大学
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] Many-body resonances in double quantum-dot systems

    • Author(s)
      Akinori Nishino
    • Organizer
      Resonances and non-Hermitian systems in quantum mechanics
    • Place of Presentation
      京都大学
    • Related Report
      2012 Research-status Report
    • Invited
  • [Presentation] 二重量子ドットにおける多電子散乱状態の厳密解

    • Author(s)
      西野 晃徳, 羽田野 直道
    • Organizer
      日本物理学会 2012年秋季大会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] 開放型二重量子ドットにおける多体束縛状態と多体共鳴

    • Author(s)
      西野晃徳,羽田野直道,Gonzalo Ordonez
    • Organizer
      日本物理学会 第68回年次大会
    • Place of Presentation
      広島大学
    • Related Report
      2012 Research-status Report
  • [Remarks] ホームページ

    • URL

      http://www.n.kanagawa-u.ac.jp/~nishino/

    • Related Report
      2013 Final Research Report
  • [Remarks] Akinori Nishino

    • URL

      http://www.n.kanagawa-u.ac.jp/~nishino/

    • Related Report
      2013 Annual Research Report

URL: 

Published: 2011-08-05   Modified: 2019-07-29  

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