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Fluctuations of information, heat and charge currents

Research Project

Project/Area Number 17K05575
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionMie University

Principal Investigator

Utsumi Yasuhiro  三重大学, 工学研究科, 准教授 (10415094)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords物性理論 / メゾスコピック系 / 非平衡量子輸送 / 情報通信 / 量子ドット / 量子エンタングルメント
Outline of Final Research Achievements

We have investigated correlations among fluctuations of information entropy current, electric charge current and heat current flowing through a two terminal quantum conductor. We developed a framework to calculate the probability distribution of fluctuations of information entropy received by one terminal and obtained the following results. 1) By analyzing the joint probability distribution between the fluctuations of information entropy and electric charge, we demonstrated that the entanglement entropy can be deduced from the electric current measurement for a certain condition. 2) We obtained the communication channel capacity of the information transmission through the quantum conductor. We demonstrated a connection between the optimum channel capacity and the entanglement entropy in the non-equilibrium steady state.

Academic Significance and Societal Importance of the Research Achievements

メゾスコピック量子系の研究は,現在まで主に単一の固体量子素子で実現される新規な量子現象について,物性物理的または非平衡統計力学的な観点を中心に行われてきた.本研究成果は,情報理論の枠組みを用いて固体量子素子における量子輸送現象を解析し,情報処理素子としての観点から研究する手がかりを与えるものである.将来的に固体量子素子による情報処理装置の研究に発展させるうえで,一つの指針となりえるという学術的意義をもつ.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (24 results)

All 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results) Presentation (16 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results)

  • [Int'l Joint Research] Tel Aviv University/Ben Gurion University(イスラエル)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] カールスルーエ大学(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Optimum capacity and full counting statistics of information content and heat quantity in the steady state2019

    • Author(s)
      Utsumi Yasuhiro
    • Journal Title

      Physical Review B

      Volume: 99 Issue: 11 Pages: 1-18

    • DOI

      10.1103/physrevb.99.115310

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Full counting statistics of information content2019

    • Author(s)
      Utsumi Yasuhiro
    • Journal Title

      The European Physical Journal Special Topics

      Volume: 227 Issue: 15-16 Pages: 1911-1928

    • DOI

      10.1140/epjst/e2018-800043-4

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spin-Current Induced Mechanical Torque in a Chiral Molecular Junction2019

    • Author(s)
      Naoki Sasao, Hiroki Okada, Yasuhiro Utsumi, Ora Entin-Wohlman, and Amnon Aharony
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 印刷中

    • NAID

      40021915256

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Full counting statistics of information content and particle number2017

    • Author(s)
      Y. Utsumi
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 8

    • DOI

      10.1103/physrevb.96.085304

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Analysis of the conditional average and conditional variance of dissipated energy in the driven spin-boson model2017

    • Author(s)
      Philip Wollfarth, Yasuhiro Utsumi, and Alexander Shnirman
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 6

    • DOI

      10.1103/physrevb.96.064302

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Relaxation time and critical slowing down of a spin-torque oscillator2017

    • Author(s)
      Tomohiro Taniguchi, Takahiro Ito, Sumito Tsunegi, Hitoshi Kubota, and Yasuhiro Utsumi
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 2

    • DOI

      10.1103/physrevb.96.024406

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] スピントルク振動器の結合におけるスピン蓄積ダイナミクスの効果2019

    • Author(s)
      井谷大樹, 内海裕洋
    • Organizer
      日本物理学会2019秋季大会 2019年9月10日 日本物理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ブラウニアン半加算器の計算時間分布2019

    • Author(s)
      伊藤康親, 内海裕洋, 鈴木義茂
    • Organizer
      日本物理学会2019年秋季大会 2019年9月10日 日本物理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Full-counting statistics of information content and the optimum capacity2019

    • Author(s)
      内海 裕洋
    • Organizer
      FQMT19 (Frontiers of Quantum and Mesoscopic Thermodynamics)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spin current and torque in chiral molecules2019

    • Author(s)
      Amnon Aharony, Ora Entin-Wohlman, Yasuhiro Utsumi
    • Organizer
      Chirality-induced spin selectivity and its related phenomena
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Quantum of information and its fluctuations in a conductor heat curren; Focus session “Quantum Thermodynamics and Resource Theories”2019

    • Author(s)
      内海裕洋
    • Organizer
      APS (American Physical Society) March Meeting 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] カイラル分子における伝導電子スピンによって誘起された力学的トルク2019

    • Author(s)
      笹尾直希, 岡田大輝, 内海裕洋, Ora Entin-Wohlman, Amnon Aharony
    • Organizer
      日本物理学会 第74回年次大会(2019年)
    • Related Report
      2018 Research-status Report
  • [Presentation] Spin-current induced mechanical torque in a chiral molecular junction2018

    • Author(s)
      N. Sasao, H. Okada and Y. Utsumi
    • Organizer
      International Symposium on Frontiers of Quantum Transport in Nano Science
    • Related Report
      2018 Research-status Report
  • [Presentation] 量子輸送における輸送効率の揺らぎの評価2018

    • Author(s)
      岡田大輝, 内海裕洋
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 量子ドットの熱量と情報量の同時確率分布2018

    • Author(s)
      内海裕洋
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 情報流および熱流揺らぎの透過率依存性2017

    • Author(s)
      内海裕洋
    • Organizer
      日本物理学会 2017年秋季大会 岩手大学(上田キャンパス)
    • Related Report
      2017 Research-status Report
  • [Presentation] 一本鎖DNAのスピン依存伝導の計算2017

    • Author(s)
      笹尾直希, 内海裕洋
    • Organizer
      日本物理学会 2017年秋季大会 岩手大学(上田キャンパス)
    • Related Report
      2017 Research-status Report
  • [Presentation] 量子ドットの熱流と通信路容量の上限2017

    • Author(s)
      内海裕洋
    • Organizer
      日本物理学会 第73回年次大会(2018年) 東京理科大 野田キャンパス
    • Related Report
      2017 Research-status Report
  • [Presentation] 量子輸送におけるエクセルギー効率の揺らぎ2017

    • Author(s)
      岡田大輝, 内海裕洋
    • Organizer
      日本物理学会 第73回年次大会(2018年) 東京理科大 野田キャンパス
    • Related Report
      2017 Research-status Report
  • [Presentation] The fluctuation of efficiencies of charge-spin and charge-heat conversions2017

    • Author(s)
      岡田大輝, 内海裕洋
    • Organizer
      SpinTEC IX, Fukuoka International Congress Center
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fluctuation of conversion efficiencies between charge, spin, and heat currents2017

    • Author(s)
      H. Okada
    • Organizer
      YITP (Yukawa Institute for theoretical physics) Workshop, Quantum Thermodynamics: Thermalization and Fluctuations
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Full-counting statistics of information content2017

    • Author(s)
      Y. Utsumi
    • Organizer
      Frontiers of Quantum and Mesoscopic Thermodynamics (FQMT2017) (Prague, Czech Republic)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2017-04-28   Modified: 2021-02-19  

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