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Elliptic hypergeometric integrals in classical and quantum integrable systems

Research Project

Project/Area Number 16F16318
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Research Field Basic analysis
Research InstitutionThe University of Tokyo

Principal Investigator

国場 敦夫  東京大学, 大学院総合文化研究科, 教授 (70211886)

Co-Investigator(Kenkyū-buntansha) KELS ANDREW  東京大学, 総合文化研究科, 外国人特別研究員
Project Period (FY) 2016-11-07 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2018: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 2017: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2016: ¥400,000 (Direct Cost: ¥400,000)
Keywordsヤン・バクスター方程式 / スタートライアングル関係式 / 可積分系 / 量子群 / Yang-Baxter equation / hypergeometric integral / gauge theory / duality / 可積分模型 / 超対称指標
Outline of Annual Research Achievements

以下の項目(1)-(4)のステップを完遂し,スター・トライアングル関係式の新しい解を構成し,応用として,関連する q-超幾何関数の積分変換を明らかにすること,超対称ゲージ理論の指数を用いた双対性による説明を与えること,更に温度に該当するパラメーターを0に近づける極限で,基底状態のスピン配置と古典可積分系における非線形発展方程式との関係を明らかにする等といったテーマに取り組み,受入研究者,特別研究員の Kels 氏および山崎雅人氏と三人で考察して研究を進めた.Kels 氏は解析的に計算を推進し,議論の要となる段階では,計算機も駆使することで途中段階の結果を確認し,新しい予想を提出するなど,研究の推進に大きく寄与した.
(1)量子群U_qsl(1,1)のR行列のパラメーター q を1のN乗根に特殊化したものを構造関数に持つ2次の代数の生成元(L演算子と呼ばれる)を求めること.(2)L演算子の各成分を補助ベクトルpsi-bar, psi を用いて因子化すること.(3)L演算子は2次元空間とN次元空間の直積に作用するが,後者の積を入れ換える同値変換を与える行列 S を求めること.(4)psi-bar, psiベクトルを利用して,(3)のSを因子化し,スピン模型のエッジ相互作用のボルツマン重率を抽出すること.
これらのうち(1), (2), (3) のステップを概ね達成できた.とくに量子U_qsl(1,1) の超対称性から L演算子や\psi-bar, \psiベクトルには反可換なグラスマン数が介入してくる.これは先行研究には見られない新規な様相である.今回の共同研究では,抽象的な代数的アプローチでなく,受入研究者が構成した R 行列から出発し,具体的な物理模型の構成という動機,背景に基づいて,そのような実例を得ることが出来たという意味で,数理物理学としての意義が深い.

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (13 results)

All 2019 2018 2017

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results)

  • [Journal Article] Lens elliptic gamma function solution of the Yang?Baxter equation at roots of unity2018

    • Author(s)
      Kels Andrew P、Yamazaki Masahito
    • Journal Title

      Journal of Statistical Mechanics: Theory and Experiment

      Volume: 2018 Issue: 2 Pages: 023108-023108

    • DOI

      10.1088/1742-5468/aaa8fd

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Matrix product solutions to the reflection equation from three dimensional integrability2018

    • Author(s)
      A. Kuniba and V. Pasquier
    • Journal Title

      Journal of Physics A: Mathematical and Theoretical

      Volume: 51 Issue: 25 Pages: 255204-255204

    • DOI

      10.1088/1751-8121/aac3b4

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Elliptic hypergeometric sum/integral transformations and supersymmetric lens index2018

    • Author(s)
      A.P. Kels and M. Yamazaki
    • Journal Title

      SIGMA

      Volume: 14 Pages: 013-29

    • DOI

      10.3842/sigma.2018.013

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Exactly solved models on planar graphs with vertices in Z32017

    • Author(s)
      A.P.Kels
    • Journal Title

      J. Phys. A: Math. Theor.

      Volume: 50 Issue: 49 Pages: 495202-495202

    • DOI

      10.1088/1751-8121/aa8f68

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The star-triangle relation, lens partition function, and hypergeometric sum/integrals2017

    • Author(s)
      Gahramanov, I. and Kels A.P
    • Journal Title

      J. High Energ. Phys

      Volume: 2017 Issue: 2

    • DOI

      10.1007/jhep02(2017)040

    • Related Report
      2016 Annual Research Report
    • Open Access
  • [Presentation] Aspects of reflection equations2019

    • Author(s)
      A. Kuniba
    • Organizer
      Rikkyo Mathematical Physics 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Hypergeometric integrals, Yang-Baxter equations, and 3D-consistent equations2018

    • Author(s)
      A Kels
    • Organizer
      Symmetry and Integrability in discrete equations
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Elliptic hypergeometric sum/integrals (poster presentation)2017

    • Author(s)
      Andrew Kels
    • Organizer
      Elliptic Hypergeometric Integrals in Combinatorics, Integrable Systems and Physics
    • Place of Presentation
      Viena (Austria)
    • Year and Date
      2017-03-20
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The star-triangle relation, lens partition function, and hypergeometric sum/integrals2017

    • Author(s)
      Andrew Kels
    • Organizer
      Australia New Zealand Association of Mathematical Physics meeting 2017
    • Place of Presentation
      Kiama (Australia)
    • Year and Date
      2017-02-01
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Yang-Baxter equation, elliptic hypergeometric integrals, and ABS equations2017

    • Author(s)
      A.P.Kels
    • Organizer
      Department of Physics and Mathematics seminar, Aoyama Gakuin University
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Yang-Baxter equation, elliptic hypergeometric integrals, and ABS equations2017

    • Author(s)
      A.P.Kels
    • Organizer
      Institute of Mathematics for Industry seminar, Kyushu University
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Elliptic hypergeometric functions and integrability in supersymmetric gauge theory2017

    • Author(s)
      A.P.Kels
    • Organizer
      Particle physics group seminar, University of Tokyo
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 3D consistent quad equations from elliptic hypergeometric integrals2017

    • Author(s)
      A.P.Kels
    • Organizer
      Institute of Physics seminar, University of Tokyo, Japan
    • Related Report
      2017 Annual Research Report

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Published: 2016-11-08   Modified: 2024-03-26  

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