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Development of an electron correlation theory for excited states of molecular aggregates

Research Project

Project/Area Number 19H02675
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionKyoto University

Principal Investigator

Kurashige Yuki  京都大学, 理学研究科, 准教授 (30510242)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords電子状態理論 / 励起状態 / 量子化学計算 / 励起状態計算 / 量子化学 / 分子集合系 / 複合励起 / 電子状態 / 分子集合 / 有効ハミルトニアン / テンソル分解 / 理論化学 / 低ランク近似 / 密度行列 / エネルギー移動 / 分子結晶 / 分子システム / 電子励起状態 / 電子機能 / 密度行列繰り込み群
Outline of Research at the Start

分子集積システムにおける高効率なエネルギー変換・輸送の原理を分子構造レベルで理解し、制御することは物質科学における次の重要なステップである。従来のアプローチはキャリア輸送など一つの機能に注目してきたが、実際の分子集積システムの中では多数の励起状態素過程がフェムト秒~ナノ秒のスケールで競争的に起きており、今後それらの競争や協奏の帰結として機能発現の仕組みを理解することが重要になる。その先鞭として、本研究では多種多様な遷移過程をバランス良く記述する集合系の励起状態理論を開発することにより分子構造から集合システムのマクロな電子機能をつなぐ分子電子論を展開する。

Outline of Final Research Achievements

To understand the underlying principle of the efficient electronic functions of molecularly assembled systems based on the micro-level information such as molecular structures and molecular orientations, molecular theories were developed. Specifically, an electronic-structure theory suited to the excited states of molecular aggregates describing inter-molecular quantum entanglement, inspired by the density matrix renormalization group method for describing intra-molecular quantum entanglement that we have been developing, was developed. The method enables quantitative theoretical analysis of elementary processes in complex excited states involving multiple molecules such as exciton transfer, singlet fission, and charge separation.

Academic Significance and Societal Importance of the Research Achievements

有機薄膜太陽電池や光合成アンテナ系に代表される、分子集積システムにおける高効率なエネルギー変換・輸送など優れた電子的機能の原理を分子構造レベルで理解・制御することは物質科学における次の重要なステップである。分子集積システムの中ではエネルギー・電荷の移動、電荷分離・再結合など多数の複合励起状態の素過程がフェムト秒からナノ秒のスケールで競争的に起きており、それらの競争・協奏の結果として機能発現の仕組みを理解する必要があり、本研究で開発した集合系特有の複合励起状態の精密な記述を可能にする信頼性の高い計算手法により電子状態計算に基づく分子集合システムの電子機能解析・設計への貢献が期待される。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (14 results)

All 2022 2021 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results)

  • [Journal Article] Matrix Product State Formulation of the MCTDH Theory in Local Mode Representations for Anharmonic Potentials2022

    • Author(s)
      Kentaro Hino, Yuki Kurashige
    • Journal Title

      Journal of Chemical Theory and Computation

      Volume: 18 Issue: 2 Pages: 3347-3356

    • DOI

      10.1021/acs.jctc.9b00963

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Importance of dynamical electron correlation in diabatic couplings of electron-exchange processes2022

    • Author(s)
      Nishio Soichiro、Kurashige Yuki
    • Journal Title

      The Journal of Chemical Physics

      Volume: 156 Issue: 11 Pages: 114107-114107

    • DOI

      10.1063/5.0075978

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Required nearest-neighbor Coulomb interactions for a charge-ordered phase transition in (TMTTF)2MF6 with inversion symmetry breaking in crystal2022

    • Author(s)
      Kitamura Naoki、Kurashige Yuki
    • Journal Title

      Chemical Physics Letters

      Volume: 787 Pages: 139254-139254

    • DOI

      10.1016/j.cplett.2021.139254

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rank-one basis made from matrix-product states for a low-rank approximation of molecular aggregates2019

    • Author(s)
      Nishio Soichiro、Kurashige Yuki
    • Journal Title

      The Journal of Chemical Physics

      Volume: 151 Issue: 8 Pages: 084110-084110

    • DOI

      10.1063/1.5093346

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 局在化振動を利用した Matrix Product State MCTDH の開発2022

    • Author(s)
      樋野健太郎, 倉重佑輝
    • Organizer
      第24回理論化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Low-rank型波動関数を用いた分子集合体励起状態のモデルハミルトニアン解析2022

    • Author(s)
      西尾宗一郎, 倉重佑輝
    • Organizer
      第24回理論化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Low-rank型波動関数理論によるπ共役分子集合体における励起子の解析2022

    • Author(s)
      西尾宗一郎, 倉重佑輝
    • Organizer
      第16回分子科学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 多自由度系の高精度核波束ダイナミクス実現に向けたMatrix Product State MCTDHにおけるgrid基底の開発2022

    • Author(s)
      樋野健太郎, 倉重佑輝
    • Organizer
      第16回分子科学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Time-dependent matrix-product states for quantum dynamics in many degrees of freedom2021

    • Author(s)
      Yuki Kurashige
    • Organizer
      Pacifichem 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Ab initio modeling of electronic transition processes in molecular aggregates2021

    • Author(s)
      Yuki Kurashige
    • Organizer
      Pacifichem 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Quantum chemistry meets quantum computer2020

    • Author(s)
      Yuki Kurashige
    • Organizer
      Quantum Computational Materials Science Roundtable
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Excited-State Quantum Dynamics with Tim-Dependent Matrix-Product States2019

    • Author(s)
      Yuki Kurashige
    • Organizer
      Asia-Pacific Association of Theoretical and Computational Chemists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Theoretical investigation of spin conversion processes in molecular systems2019

    • Author(s)
      Yuki Kurashige
    • Organizer
      (XVth Quantum Reactive Scattering Workshop
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 多自由度系の多状態核波束ダイナミクス: 時間依存MPS-MCTDH法の開発2019

    • Author(s)
      倉重佑輝
    • Organizer
      分子科学討論会
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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