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2017 Fiscal Year Research-status Report

Computational approach to the quantum theory of gravity

Research Project

Project/Area Number 17K14285
Research InstitutionKyoto University

Principal Investigator

花田 政範  京都大学, 白眉センター, 特定准教授 (40626735)

Project Period (FY) 2017-04-01 – 2020-03-31
Keywords量子重力 / 超弦理論 / カオス / ブラックホール
Outline of Annual Research Achievements

2017年度は以下の5本の論文が査読付き学術誌に掲載された:

[1]"O(a) Improvement of 2D N=(2,2) Lattice SYM Theory", Nucl. Phys. B 929; [2]"Toward Holographic Reconstruction of Bulk Geometry from Lattice Simulations", JHEP 1802; [3]"Universality in Chaos: Lyapunov Spectrum and Random Matrix Theory", Phys. Rev. E 97; [4]"Lattice Simulations of 10d Yang-Mills toroidally compactified to 1d, 2d and 4d",Phys. Rev. D 96; [5]"Black Holes and Random Matrices", JHEP 1705

さらに2本をarXivプレプリントサーバーに投稿済みであり、うち1本が査読中、もう1本は近日中に査読付き学術誌に投稿予定である。さらに、11の国際研究会で招待講演を行った。研究内容は超対称ゲージ理論の格子定式化の改善(論文[1])と数値シミュレーション(論文[2])、古典および量子カオス系のダイナミクスとその量子論的ブラックホールとの関わり(論文[3],[5])など多岐に渡った。論文[2]-[5]では数値シミュレーションが重要な役割を果たした。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

理論面では、当初全く想定していなかった新しいアイデアを得られたことも含め、順調に進展している。数値シミュレーションでも着実な進歩があったが、共同研究者間の共同作業が効率化できればより大規模なシミュレーションが可能になると考えている。また、GPUマシンで利用可能なコードの開発には多少の遅れが見られる。

Strategy for Future Research Activity

当面は、GPUマシンで利用可能なコードの開発を進めつつ、既存のコードでBFSS行列模型、BMN行列模型のM理論的な振る舞いを明らかにするための数値シミュレーションを進める。特に、M2-braneに対応する真空の定量的な性質とM5-braneに対応する真空の定性的な性質を明らかにすることを目標とする。2018年度後半には新しいコードの利用を開始したい。

Causes of Carryover

2018年4月に研究会を主催するのに合わせて海外から第一線の研究者を招いて共同研究をするために、2017年度分の一部を繰り越した。

  • Research Products

    (21 results)

All 2018 2017 Other

All Int'l Joint Research (3 results) Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results) Presentation (13 results) (of which Int'l Joint Research: 12 results,  Invited: 13 results)

  • [Int'l Joint Research] スタンフォード大学/カリフォルニア大学サンタバーバラ校/プリンストン高等研究所(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      スタンフォード大学/カリフォルニア大学サンタバーバラ校/プリンストン高等研究所
    • # of Other Institutions
      2
  • [Int'l Joint Research] レーゲンスブルグ大学(ドイツ)

    • Country Name
      GERMANY
    • Counterpart Institution
      レーゲンスブルグ大学
    • # of Other Institutions
      1
  • [Int'l Joint Research] Insititute for Basic Science(韓国)

    • Country Name
      KOREA (REP. OF KOREA)
    • Counterpart Institution
      Insititute for Basic Science
  • [Journal Article] O(a) improvement of 2D N=(2,2) lattice SYM theory2018

    • Author(s)
      Hanada Masanori、Kadoh Daisuke、Matsuura So、Sugino Fumihiko
    • Journal Title

      Nuclear Physics B

      Volume: 929 Pages: 266~297

    • DOI

      10.1016/j.nuclphysb.2018.02.008

    • Peer Reviewed
  • [Journal Article] Toward holographic reconstruction of bulk geometry from lattice simulations2018

    • Author(s)
      Rinaldi Enrico、Berkowitz Evan、Hanada Masanori、Maltz Jonathan、Vranas Pavlos
    • Journal Title

      Journal of High Energy Physics

      Volume: 2018 Pages: 042

    • DOI

      10.1007/JHEP02(2018)042

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Universality in chaos: Lyapunov spectrum and random matrix theory2018

    • Author(s)
      Hanada Masanori、Shimada Hidehiko、Tezuka Masaki
    • Journal Title

      Physical Review E

      Volume: 97 Pages: 022224

    • DOI

      10.1103/PhysRevE.97.022224

    • Peer Reviewed
  • [Journal Article] Lattice simulations of 10d Yang-Mills toroidally compactified to 1d, 2d, and 4d2017

    • Author(s)
      Hanada Masanori、Romatschke Paul
    • Journal Title

      Physical Review D

      Volume: 96 Pages: 094502

    • DOI

      10.1103/PhysRevD.96.094502

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Black holes and random matrices2017

    • Author(s)
      Cotler Jordan S.、Gur-Ari Guy、Hanada Masanori、Polchinski Joseph、Saad Phil、Shenker Stephen H.、Stanford Douglas、Streicher Alexandre、Tezuka Masaki
    • Journal Title

      Journal of High Energy Physics

      Volume: 2017 Pages: 118

    • DOI

      10.1007/JHEP05(2017)118

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Monte Carlo Approach to Superstring Theory for Dummies2018

    • Author(s)
      Masanori Hanada
    • Organizer
      The Second Mandelstam Theoretical Physics Workshop
    • Int'l Joint Research / Invited
  • [Presentation] A numerical Approach to Holography2018

    • Author(s)
      Masanori Hanada
    • Organizer
      Nonperturbative and Numerical Approaches to Quantum Gravity, String Theory and Holography
    • Int'l Joint Research / Invited
  • [Presentation] New Universality in Chaos2018

    • Author(s)
      Masanori Hanada
    • Organizer
      Nonperturbative and Numerical Approaches to Quantum Gravity, String Theory and Holography
    • Int'l Joint Research / Invited
  • [Presentation] Early-time Universality in Chaos?2018

    • Author(s)
      Masanori Hanada
    • Organizer
      IV Saha Theory Workshop: Modern Aspects of String Theory
    • Int'l Joint Research / Invited
  • [Presentation] From non-gravitational theory to quantum gravity via holography2018

    • Author(s)
      Masanori Hanada
    • Organizer
      BU/ICAM Workshop on Nonequilibrium Quantum Universality
    • Int'l Joint Research / Invited
  • [Presentation] ゲージ重力対応とその「応用」2018

    • Author(s)
      花田政範
    • Organizer
      日本物理学会春季大会
    • Invited
  • [Presentation] Black hole from lattice via holography: Precision test and emergent geometry2017

    • Author(s)
      Masanori Hanada
    • Organizer
      Lattice for BSM Physics 2017
    • Int'l Joint Research / Invited
  • [Presentation] Quantum Gravity from Lattice Gauge Theory via Holography2017

    • Author(s)
      Masanori Hanada
    • Organizer
      ``Making Quantum Gravity Computable" summer school
    • Int'l Joint Research / Invited
  • [Presentation] Monte Carlo Approach to Quantum Gravity via Holography2017

    • Author(s)
      Masanori Hanada
    • Organizer
      ICTP Mini Workshop on String Theory
    • Int'l Joint Research / Invited
  • [Presentation] Chaos, Black Hole and Random Matrix2017

    • Author(s)
      Masanori Hanada
    • Organizer
      Quantum Thermodynamics: Thermalization and fluctuations
    • Int'l Joint Research / Invited
  • [Presentation] Integrability and Chaos in Multicomponent Systems2017

    • Author(s)
      Masanori Hanada
    • Organizer
      Chaos, Black Hole and Random Matrix
    • Int'l Joint Research / Invited
  • [Presentation] A black hole in a lab?2017

    • Author(s)
      Masanori Hanada
    • Organizer
      ick-off workshop for Bay Area qubitzers
    • Int'l Joint Research / Invited
  • [Presentation] Real-time aspects of quantum BH and universality in chaos2017

    • Author(s)
      Masanori Hanada
    • Organizer
      Workshop on Strongly-Interacting Field Theories at Friedrich-Schiller-Universitat Jena
    • Int'l Joint Research / Invited

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Published: 2018-12-17   Modified: 2022-02-21  

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