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Massively-Parallel Computations for Nuclear Dynamics Based on a Next-Generation Theory with Multiple Slater Determinants

Research Project

Project/Area Number 19K14704
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionTokyo Institute of Technology (2021-2022)
Niigata University (2019-2020)

Principal Investigator

Sekizawa Kazuyuki  東京工業大学, 理学院, 准教授 (00820854)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords原子核反応 / 時間依存密度汎関数法 / 時間依存平均場理論 / 多核子移行反応 / 深部非弾性散乱 / エネルギー散逸 / 量子揺らぎ / HPC / 原子核物理学 / 量子多体問題 / 重イオン反応 / ダイナミクス / 確率論的平均場理論 / 並列計算 / 原子核理論 / 量子多体理論 / TDDFT / 超並列計算
Outline of Research at the Start

量子多体問題の研究は,新奇な物質・デバイスを探求する物質科学から,生体物質の機構解明を目指す生命科学,そして,元素の起源に関わる天体現象を含む天体核物理学の根幹をも成す,極めて普遍的かつ重要な基礎科学的研究である.本研究課題では,時間に依存する量子多体問題,特に原子核ダイナミクスの,より現実的な記述を与える新しい理論的枠組みを構築し,最新のスパコンを駆使した超並列計算により,原子核の励起・崩壊・反応過程における未解決問題に挑戦する.

Outline of Final Research Achievements

In this project, the so-called stochastic mean-field (SMF) theory has been employed to introduce initial quantal fluctuations in the description. The SMF theory has been successfully implemented to our parallel computational code and has been applied. As a result, it has been demonstrated that the SMF theory significantly improve the quantitative description of production cross sections for multinucleon transfer processes. Moreover, the SMF theory has been extended to describe kinetic energy distribution which otherwise could not be described before. The agreement is not yet perfect, and to figure out the origin of discrepancy is one of the future works. It has been expected that the description can be further improved by introducing correlations (mixing) of Slater determinants.

Academic Significance and Societal Importance of the Research Achievements

本研究課題の実施期間には,時間依存密度汎関数法(Time-Dependent Density Functional Theory: TDDFT)に初期揺らぎを導入する枠組みの開発と応用を進めた.この方法は,原子核の反応だけでなく,励起・応答・核分裂等にも応用することが可能である.また,相互作用やスケールが異なるだけで,物性分野等で扱う他の量子多体系への応用も期待できる.また,この方法によって低エネルギー原子核反応に伴う物理量を微視的かつ定量的に記述できるようになったことで,未知の不安定核の生成や新奇なダイナミクスの予言等への更なる応用が期待でき,原子核物理学分野において高い学術的な意義を持つ.

Report

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

    (32 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (7 results) Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 8 results,  Invited: 7 results) Remarks (6 results)

  • [Int'l Joint Research] テネシー工科大学(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] BARC/IUAC(インド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Tennessee Technological University(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Bhabha Atomic Research Centre(インド)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Tenessee Technological University(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Warsaw University of Technology(ポーランド)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Tennessee Technological University(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Determination of 1p- and 2p-stripping excitation functions for $$^{16}$$O+$$^{142}$$Ce using a recoil mass spectrometer2023

    • Author(s)
      Biswas Rohan、Nath S.、Gehlot J.、Gonika、Kumar Chandra、Parihari A.、Madhavan N.、Vinayak A.、Mahato Amritraj、Noor Shoaib、Sherpa Phurba、Sekizawa Kazuyuki
    • Journal Title

      The European Physical Journal A

      Volume: 59 Issue: 3 Pages: 60-60

    • DOI

      10.1140/epja/s10050-023-00975-z

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reaction mechanism study for multinucleon transfer processes in collisions of spherical and deformed nuclei at energies near and above the Coulomb barrier: The 16O+154Sm reaction2022

    • Author(s)
      Roy B. J.、Santra S.、Pal A.、Kumawat H.、Pandit S. K.、Parkar V. V.、Ramachandran K.、Mahata K.、Sekizawa K.
    • Journal Title

      Physical Review C

      Volume: 105 Issue: 4 Pages: 044611-044611

    • DOI

      10.1103/physrevc.105.044611

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Kinetic-energy dissipation and fluctuations in strongly damped heavy-ion collisions within the stochastic mean-field approach2020

    • Author(s)
      Ayik Sakir、Sekizawa Kazuyuki
    • Journal Title

      Physical Review C

      Volume: 102 Issue: 6 Pages: 064619-064619

    • DOI

      10.1103/physrevc.102.064619

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Quantal diffusion approach for multinucleon transfer processes in the Ni58,64+Pb208 reactions: Toward the production of unknown neutron-rich nuclei2020

    • Author(s)
      Sekizawa Kazuyuki、Ayik Sakir
    • Journal Title

      Physical Review C

      Volume: 102 Issue: 1 Pages: 014620-014620

    • DOI

      10.1103/physrevc.102.014620

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Zeptosecond contact times for element Z=120 synthesis2020

    • Author(s)
      Albers H.M. et al.
    • Journal Title

      Physics Letters B

      Volume: 808 Pages: 135626-135626

    • DOI

      10.1016/j.physletb.2020.135626

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] TDHF and a Macroscopic Aspect of Low-Energy Nuclear Reactions2020

    • Author(s)
      Washiyama Kouhei、Sekizawa Kazuyuki
    • Journal Title

      Frontiers in Physics

      Volume: 8 Pages: 93-93

    • DOI

      10.3389/fphy.2020.00093

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Time-Dependent Microscopic Approaches for Heavy-Ion Multinucleon Transfer Reactions: Recent Progress2022

    • Author(s)
      Kazuyuki Sekizawa
    • Organizer
      International workshop on Physics of RI: Recent progress and perspective
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Developments in Microscopic Theories for Low-Energy Heavy-Ion Reactions: Towards Superheavy Element Synthesis2022

    • Author(s)
      Kazuyuki Sekizawa
    • Organizer
      International symposium on Developments of Physics of Unstable Nuclei (YKIS2022b)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 確率論的平均場理論によるエネルギー散逸と揺らぎの記述2021

    • Author(s)
      関澤一之,Sakir Ayik
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] フェルミ粒子系超流動ダイナミクスの数値シミュレーション2021

    • Author(s)
      関澤 一之
    • Organizer
      第76回日本物理学会年次大会 素粒子論領域・理論核物理領域合同シンポジウム「富岳・ポスト富岳時代の素粒子原子核物理学」
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 確率論的平均場理論による重イオン多核子移行反応の記述2021

    • Author(s)
      関澤 一之
    • Organizer
      日本物理学会 第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 時間依存密度汎関数法による原子核ダイナミクスの研究:最近の進展2020

    • Author(s)
      関澤 一之
    • Organizer
      KEK理論センターオンラインミーティング
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 時間依存バンド理論による中性子星内殻スラブ相における反エントレインメント効果2020

    • Author(s)
      関澤 一之
    • Organizer
      日本物理学会 2020年秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ime-Dependent Hartree-Fock Theory and Its Extensions for Low-Energy Nuclear Reactions: Recent Progress2019

    • Author(s)
      K. Sekizawa
    • Organizer
      The 64th DAE-BNRS Symposium on Nuclear Physics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Time-Dependent Density Functional Theory and Its Extensions for Nuclear Dynamics2019

    • Author(s)
      K. Sekizawa
    • Organizer
      International Workshop on "New Generation Nuclear Density Functionals"
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Time-Dependent Hartree-Fock Theory and Its Extensions for the Superheavy Element Synthesis2019

    • Author(s)
      K. Sekizawa
    • Organizer
      Heavy Ion Accelerator Symposium on Fundamental and Applied Science (HIAS2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Time-Dependent Hartree-Fock Theory and Its Extensions for the Superheavy Element Synthesis2019

    • Author(s)
      K. Sekizawa, K. Hagino, and A. Wakhle
    • Organizer
      The 4th International Symposium on Superheavy Elements (SHE2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Time-Dependent Hartree-Fock Theory and Its Extensions for the Superheavy Element Synthesis2019

    • Author(s)
      K. Sekizawa
    • Organizer
      YITP international molecule-type workshop on "Nuclear Fission Dynamics 2019"
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Time-Dependent Hartree-Fock Theory and Its Extensions for Low-Energy Heavy-Ion Reactions2019

    • Author(s)
      K. Sekizawa
    • Organizer
      China-Japan Collaboration Workshop on "Nuclear Mass and Life for Unraveling Mysteries of R-process"
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] 量子多体理論に基づく原子核衝突における観測量分布の定量的記述

    • URL

      https://www.jsps.go.jp/file/storage/grants/j-grantsinaid/37_topics/data/00187-13101-00820854.pdf

    • Related Report
      2022 Annual Research Report
  • [Remarks] Kazuyuki Sekizawa's blog

    • URL

      https://kazuyuki-sekizawa.tumblr.com/post/638261725202874368/how-do-kinetic-energy-fluctuations-emerge-in

    • Related Report
      2021 Research-status Report
  • [Remarks] 量子多体理論に基づく原子核衝突における観測量分布の定量的記述

    • URL

      https://www.jsps.go.jp/j-grantsinaid/37_topics/data/00187-13101-00820854.pdf

    • Related Report
      2020 Research-status Report
  • [Remarks] たとえばケーキ作りのように!?原子核から世界の成り立ちを探求する

    • URL

      http://hotozero.com/?p=16955

    • Related Report
      2020 Research-status Report
  • [Remarks] Kazuyuki Sekizawa's Homepage

    • URL

      http://sekizawa.fizyka.pw.edu.pl

    • Related Report
      2020 Research-status Report
  • [Remarks] Kazuyuki SEKIZAWA | Niigata University

    • URL

      http://sekizawa.fizyka.pw.edu.pl/english/activities.html

    • Related Report
      2019 Research-status Report

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

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