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Novel quantum space-time on curved Dirac materials and relativistic quantum many-body characteristics

Research Project

Project/Area Number 16K05334
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 InstitutionSendai National College of Technology

Principal Investigator

Hasebe Kazuki  仙台高等専門学校, 総合工学科, 准教授 (60435469)

Co-Investigator(Kenkyū-buntansha) 柴田 尚和  東北大学, 理学研究科, 准教授 (40302385)
Project Period (FY) 2016-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords高次元トポロジカル系 / 高次元非可換幾何 / ディラック物質 / スクィーズド状態 / トポロジカル絶縁体 / 量子ホール効果 / スカーム型非線形シグマ模型 / スカーム模型 / ランダウ模型 / 磁場中の物理 / 非可換幾何 / 位相的ソリトン / 量子光学 / 相対論的ランダウ模型 / ワイル半金属 / 量子異常 / 指数定理 / グラフェン量子ホール効果 / 素粒子論 / 物性理論
Outline of Final Research Achievements

We investigated quantum properties of the quantum many-body system on Dirac materials using analytic and nunmerical methods. An important relativistic effect in the quantum many-body system was unveiled in the present study. The relativistic effect acts to the quantum many-body physics in magnetic field as the `parity quantum anomaly’and we pointed out that the parity anomaly brings instability to the Laughlin's many-body ground state. I also investigated the `relativistic’ non-commutative geometry in the context of the Dirac materials imposed on a magnetic field. In this process, a pure quantum geometry that does not have its classical counterpart was newly discovered. I also applied the obtained results to general constructions of the squeezed states in quantum optics and topological solitons in higher dimensions.

Academic Significance and Societal Importance of the Research Achievements

本研究において古典的対応物を持たない量子時空が初めて明らかになったことは、素粒子論や数理物理において今後の発展が期待できる成果と考えている。また量子時空の数学が物質系で実現することは、単に机上の研究でなく実際の物理系と密接に関係していることを意味しており特別な学術的意義がある。更にグラフェンに代表されるディラック物質と呼ばれる相対論的な分散を有する物質系はその伝導性の高さやトポロジー的観点から工学的な応用が期待されている。本研究成果である量子多体系における相対論的な特異効果は、これら社会に還元効果の高い物質の性質を一部明らかにしたといえる。

Report

(6 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (24 results)

All 2021 2020 2019 2018 2017 2016 Other

All Journal Article (10 results) (of which Peer Reviewed: 10 results,  Open Access: 4 results,  Acknowledgement Compliant: 2 results) Presentation (13 results) (of which Int'l Joint Research: 5 results,  Invited: 6 results) Remarks (1 results)

  • [Journal Article] Spin-entangled squeezed state on a Bloch four-hyperboloid2021

    • Author(s)
      Kazuki Hasebe
    • Journal Title

      Journal of Physics A: Mathematical and Theoretical

      Volume: -

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] SO(5) Landau models and nested Nambu matrix geometry2020

    • Author(s)
      Hasebe Kazuki
    • Journal Title

      Nuclear Physics B

      Volume: 956 Pages: 115012-115012

    • DOI

      10.1016/j.nuclphysb.2020.115012

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A unified construction of Skyrme-type non-linear sigma models via the higher dimensional Landau models2020

    • Author(s)
      Hasebe Kazuki
    • Journal Title

      Nuclear Physics B

      Volume: 961 Pages: 115250-115250

    • DOI

      10.1016/j.nuclphysb.2020.115250

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] $Sp(4; \mathbb{R})$ squeezing for Bloch four-hyperboloid via the non-compact Hopf map2020

    • Author(s)
      Hasebe Kazuki
    • Journal Title

      Journal of Physics A: Mathematical and Theoretical

      Volume: 53 Issue: 5 Pages: 055303-055303

    • DOI

      10.1088/1751-8121/ab3cda

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] SO(4) Landau models and matrix geometry2018

    • Author(s)
      Hasebe Kazuki
    • Journal Title

      Nuclear Physics B

      Volume: 934 Pages: 149-211

    • DOI

      10.1016/j.nuclphysb.2018.06.023

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fractional Quantum Hall Effects in Graphene on a h-BN Substrate2018

    • Author(s)
      Yonaga Kouki、Shibata Naokazu
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 87 Issue: 3 Pages: 034708-034708

    • DOI

      10.7566/jpsj.87.034708

    • NAID

      210000134745

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Higher (odd) dimensional quantum Hall effect and extended dimensional hierarchy2017

    • Author(s)
      Hasebe Kazuki
    • Journal Title

      Nuclear Physics B

      Volume: 920 Pages: 475-520

    • DOI

      10.1016/j.nuclphysb.2017.03.017

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Nambu Geometry in Quantum Hall Effect and Topological Insulator2017

    • Author(s)
      Hasebe Kazuki
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 883 Pages: 012010-012010

    • DOI

      10.1088/1742-6596/883/1/012010

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Relastivistic Landau models and generation of fuzzy spheres2016

    • Author(s)
      Kazuki Hasebe
    • Journal Title

      International Journal of Modern Physics A

      Volume: 31 Issue: 20n21 Pages: 1650117-1650117

    • DOI

      10.1142/s0217751x16501177

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Formulation of the relativistic quantum Hall effect and parity anomaly2016

    • Author(s)
      Kouki Yonaga, Kazuki Hasebe and Naokazu Shibata
    • Journal Title

      Phys. Rev. B

      Volume: 93 Issue: 23

    • DOI

      10.1103/physrevb.93.235122

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 高次元ランダウ模型によるスカーム型非線形シグマ模型の統一的構成2021

    • Author(s)
      長谷部一気
    • Organizer
      日本物理学会年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] SO(5)ランダウ模型と4次元の非可換球面2020

    • Author(s)
      長谷部一気
    • Organizer
      日本物理学会年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Quantum geometry of higher dimensional quantum Hall effect and topological insulators associated with generalizations of number2019

    • Author(s)
      Hasebe Kazuki
    • Organizer
      Progress in the Mathematics of Topological States of Matter
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Sp(4; R) squeezing and Bloch hyperboloid via the non-compact Hopf map2019

    • Author(s)
      Hasebe Kazuki
    • Organizer
      International Conference on Holography, String Theory and Discrete Approaches in Danang
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 4次元のブロッホ双曲幾何に基づくスクィーズド状態の理論的拡張2019

    • Author(s)
      長谷部一気
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Non-commutative geometry and differential topology in higher dimensional Landau models2018

    • Author(s)
      Hasebe Kazuki
    • Organizer
      International conference on holography, string theory and discrete approaches in Hanoi
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] SO(4) Landau model and matrix geometry2018

    • Author(s)
      Kazuki Hasebe
    • Organizer
      日本物理学会年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Non-commutative geometry and Landau physics associated with generalizations of numbers2017

    • Author(s)
      Kazuki Hasebe
    • Organizer
      非可換幾何と数理物理2017
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Non-commutative geometry and Landau physics associated with generalizations of numbers2017

    • Author(s)
      Kazuki Hasebe
    • Organizer
      Workshop on solitons, gauge fields and integrabilioty: methods and applications
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 量子ホールの文脈における南部幾何と指数定理2017

    • Author(s)
      長谷部 一気
    • Organizer
      日本物理学会 年次大会
    • Place of Presentation
      大阪大学(豊中キャンパス)
    • Related Report
      2016 Research-status Report
  • [Presentation] グラフェンの分数量子ホール状態におけるバレー構造と質量項の効果2017

    • Author(s)
      世永 公輝、 柴田 尚和
    • Organizer
      日本物理学会 年次大会
    • Place of Presentation
      大阪大学(豊中キャンパス)
    • Related Report
      2016 Research-status Report
  • [Presentation] Nambu Geometry in Quantum Hall Effect and Topological insulators2016

    • Author(s)
      Kazuki Hasebe
    • Organizer
      IF-YITP GR-HEP-Cosmo International Symposium VI
    • Place of Presentation
      Narasuan Univ., Thai
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ディラック粒子系における分数量子ホール状態の質量項依存性2016

    • Author(s)
      世永 公輝、 長谷部 一気、 柴田 尚和
    • Organizer
      日本物理学会 秋季大会
    • Place of Presentation
      金沢大学
    • Related Report
      2016 Research-status Report
  • [Remarks] 長谷部一気准教授が石田實記念財団研究奨励賞を受賞しました

    • URL

      https://www.sendai-nct.ac.jp/20191204-1/

    • Related Report
      2019 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2022-01-27  

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