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Research on S-matrix and string theory for quantum entanglement

Research Project

Project/Area Number 17K05421
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionOsaka Metropolitan University (2022)
Osaka City University (2017, 2021)
Doshisha University (2018-2020)

Principal Investigator

Seki Shigenori  大阪公立大学, 数学研究所, 特別研究員 (60373320)

Project Period (FY) 2017-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsエンタングルメント・エントロピー / 陽子散乱 / 弦理論 / 弦の2点振幅 / mostly BRST exact演算子 / 非弾性散乱 / 閉弦の2点振幅 / 開弦の振幅 / エンタングルメント / 弦の散乱振幅 / 超対称性 / quantum entanglement / scattering amplitude / string amplitude / 高エネルギー散乱 / 弾性散乱 / 陽子半径 / 素粒子論 / 数理物理
Outline of Final Research Achievements

Although Seki and Peschanski gave the formula of entanglement entropy for the two-particle final state in an elastic scattering, it includes divergence. We regularized it in two ways in order to improve the formula. Following this formula, we evaluated the entanglement entropy in the high-energy proton-proton scattering by the use of the data given by Tevatron and LHC.
So far one has been believed that a two-point function in a string theory vanishes. However, we showed in the operator formalism that the open string two-point amplitude does not vanish by newly introducing a mostly BRST exact operator. Furthermore, this operator is available for three and four-point amplitudes of open string tachyons.

Academic Significance and Societal Importance of the Research Achievements

弾性散乱の終状態のエンタングルメント・エントロピー公式が、我々の正則化によって改良されたことにより、実際の様々な弾性散乱について、具体的にエンタングルメント・エントロピーを評価することを可能にした。これは、加速器などの散乱実験に対して、エンタングルメントという新しい視点を開くものである。
我々が見つけたmostly BRST exact演算子は、弦理論の振幅を演算子形式で求めるための新しい方法を与えている。特に、これまでの一般的理解を覆し、2点振幅を得ることに成功した。今後、1点、0点振幅への応用も興味深い。

Report

(7 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (30 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (6 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (17 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results)

  • [Int'l Joint Research] IPhT, CEA-Saclay(フランス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] IPhT, CEA-Saclay(フランス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] IPhT, CEA-Saclay(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] IPhT, CEA-Saclay(フランス)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] IPhT, CEA-Saclay(フランス)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] IPhT, CEA-Saclay(France)

    • Related Report
      2017 Research-status Report
  • [Journal Article] The Veneziano amplitude via mostly BRST exact operator2022

    • Author(s)
      Kishimoto Isao、Sasaki Tomoko、Seki Shigenori、Takahashi Tomohiko
    • Journal Title

      Nuclear Physics B

      Volume: 974 Pages: 115647-115647

    • DOI

      10.1016/j.nuclphysb.2021.115647

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reduction of open string amplitudes by mostly BRST exact operators2021

    • Author(s)
      Seki Shigenori、Takahashi Tomohiko
    • Journal Title

      Physics Letters B

      Volume: 822 Pages: 136664-136664

    • DOI

      10.1016/j.physletb.2021.136664

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Refined formulation and evaluation of entanglement entropy in elastic scattering2021

    • Author(s)
      Seki Shigenori
    • Journal Title

      AIP Conference Proceedings

      Volume: 2343 Pages: 020013-020013

    • DOI

      10.1063/5.0047808

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] String Two-Point Amplitude Revisited by Operator Formalism2020

    • Author(s)
      Shigenori Seki
    • Journal Title

      Physics of Particles and Nuclei Letters

      Volume: 17 Issue: 5 Pages: 663-665

    • DOI

      10.1134/s1547477120050313

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Two-point string amplitudes revisited by operator formalism2020

    • Author(s)
      Seki Shigenori、Takahashi Tomohiko
    • Journal Title

      Physics Letters B

      Volume: 800 Pages: 135078-135078

    • DOI

      10.1016/j.physletb.2019.135078

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evaluation of entanglement entropy in high energy elastic scattering2019

    • Author(s)
      Peschanski Robi、Seki Shigenori
    • Journal Title

      Physical Review D

      Volume: 100 Issue: 7 Pages: 076012-076012

    • DOI

      10.1103/physrevd.100.076012

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Entanglement entropy of scattering particles2018

    • Author(s)
      Seki Shigenori
    • Journal Title

      AIP Conference Proceedings

      Volume: 2040 Pages: 020017-020017

    • DOI

      10.1063/1.5079059

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] mostly BRST exact演算子を用いた開弦1ループ振幅の計算について2023

    • Author(s)
      東國 沙紀, 岸本 功, 関 穣慶, 高橋 智彦
    • Organizer
      日本物理学会 春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ゴースト数2をもつ新たな閉弦頂点演算子について2023

    • Author(s)
      岸本 功, 甲賀 まこ, 関 穣慶, 高橋 智彦
    • Organizer
      日本物理学会 春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 新しいゲージ固定法を用いた閉弦の2点振幅の理解2022

    • Author(s)
      岸本 功, 関 穣慶, 高橋 智彦
    • Organizer
      日本物理学会 秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Two-point string amplitudes revisited2022

    • Author(s)
      Shigenori Seki
    • Organizer
      Amplitudes 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mostly BRST Exact演算子によるVeneziano振幅の導出2022

    • Author(s)
      岸本功, 北出智巳, 佐々木智子, 関穣慶, 高橋智彦
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] BRST形式によるdilaton tadpole振幅の導出2022

    • Author(s)
      岸本功, 北出智巳, 佐々木智子, 関穣慶, 高橋智彦
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] String amplitudes given by mostly BRST exact operator2021

    • Author(s)
      関穣慶, 高橋智彦
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Entanglement produced by scattering2021

    • Author(s)
      Shigenori Seki
    • Organizer
      17th International Conference of Computational Methods in Sciences and Engineering
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 4次元超対称非線形シグマ模型と双対性について2021

    • Author(s)
      近藤綾, 関穣慶, 高橋智彦
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Formulation and Evaluation of Entanglement Entropy in Elastic Scattering2020

    • Author(s)
      Shigenori Seki
    • Organizer
      KEK Theory Seminar
    • Related Report
      2020 Research-status Report
  • [Presentation] Two-point String Amplitudes Revisited by Operator Formalism2020

    • Author(s)
      Shigenori Seki
    • Organizer
      Seminaire de matrices, cordes et geometries aleatoires
    • Related Report
      2019 Research-status Report
  • [Presentation] Improved string amplitudes in operator formalism2020

    • Author(s)
      関穣慶, 高橋智彦
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] String two-point amplitude revisited by operator formalism2019

    • Author(s)
      Shigenori Seki
    • Organizer
      Supersymmetries and Quantum Symmetries - SQS'19
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Reformulation and Evaluation of Entanglement Entropy in High Energy Scattering2019

    • Author(s)
      Robi Peschanski, 関穣慶
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] タキオン真空における世界面の構造について2019

    • Author(s)
      岸本功, 北出智巳, 関穣慶, 高橋智彦, 津田明日華
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Entanglement Entropy of Scattering Particles2018

    • Author(s)
      Shigenori Seki
    • Organizer
      14th International Conference of Computational Methods in Sciences and Engineering
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effective Size of Particle from Entanglement Entropy in Scattering2018

    • Author(s)
      Robi Peschanski, 関 穣慶
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2024-01-30  

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