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Study on gapped ground states in quantum spin systems

Research Project

Project/Area Number 19K03534
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12010:Basic analysis-related
Research InstitutionThe University of Tokyo

Principal Investigator

Ogata Yoshiko  東京大学, 大学院数理科学研究科, 教授 (80507955)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords量子統計力学 / 量子スピン系 / トポロジカル相 / フェルミオン / SPT相 / スペクトルギャップ
Outline of Research at the Start

トポロジカル相は近年広く研究され、量子コンピューターなど応用上の期待も高まっている対象である。本研究の目的はこのトポロジカル相について数学的な理論を確立することにある。トポロジカル相のラベルとして色んなものが提起されているが、数学的な見地から厳密にこれらを検証することにより、数学、数理物理学そのものにおける知見を深めるのみならず、確固たる理論のもとに話を進めることが出来るという意味で実用上の意義もある。

Outline of Final Research Achievements

Operators, called Hamiltonians give the dynamics of quantum many-body systems. The classification problem of Hamiltonians with a spectral gap is the subject of this research project. Two Hamiltonians are equivalent if we can connect them without closing the spectral gap. The version with symmetry also plays an important role. In this research project, we derived SPT-phase invariants in one and two spatial dimensions. We also derived the so-called anyon which characterizes topological phases. We consider such problems in general settings.

Academic Significance and Societal Importance of the Research Achievements

スペクトルギャップを持った量子多体系は量子計算機を実現するものとして注目されている。本研究はその基本的な性質、数学的な性質を明らかにする研究成果としての意義がある。特に、本研究の特徴として、量子多体系の第一原理、ミクロな法則から出発していること、モデル解析のみならず最終的には一般的な系での結果を出していること、数学的に厳密であること、が挙げられ、本アプローチの利点ということができる。

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 2022 2021 2020 2019

All Journal Article (12 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 10 results,  Open Access: 4 results) Presentation (20 results) (of which Int'l Joint Research: 16 results,  Invited: 20 results)

  • [Journal Article] An Invariant of Symmetry Protected Topological Phases with On-Site Finite Group Symmetry for Two-Dimensional Fermion Systems2022

    • Author(s)
      Ogata Yoshiko
    • Journal Title

      Communications in Mathematical Physics

      Volume: 395 Issue: 1 Pages: 405-457

    • DOI

      10.1007/s00220-022-04438-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Split and Approximate Split Property in 2D Systems: Stability and Absence of Superselection Sectors2022

    • Author(s)
      Naaijkens Pieter、Ogata Yoshiko
    • Journal Title

      Communications in Mathematical Physics

      Volume: 392 Issue: 3 Pages: 921-950

    • DOI

      10.1007/s00220-022-04356-3

    • Related Report
      2022 Annual Research Report
  • [Journal Article] A derivation of braided C*-tensor categories from gapped ground states satisfying the approximate Haag duality2022

    • Author(s)
      Ogata Yoshiko
    • Journal Title

      Journal of Mathematical Physics

      Volume: 63 Issue: 1 Pages: 011902-011902

    • DOI

      10.1063/5.0061785

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Journal Article] An H^3(G,T)-valued index of symmetry-protected topological phases with on-site finite group symmetry for two-dimensional quantum spin systems2021

    • Author(s)
      Ogata Yoshiko
    • Journal Title

      Forum of Mathematics, Pi

      Volume: 9 Pages: 1-62

    • DOI

      10.1017/fmp.2021.17

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Z_2-index of Symmetry Protected Topological Phases with Reflection Symmetry for Quantum Spin Chains2021

    • Author(s)
      Ogata Yoshiko
    • Journal Title

      Communications in Mathematical Physics

      Volume: 385 Issue: 3 Pages: 1245-1272

    • DOI

      10.1007/s00220-021-04057-3

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] General Lieb?Schultz?Mattis Type Theorems for Quantum Spin Chains2021

    • Author(s)
      Ogata Yoshiko、Tachikawa Yuji、Tasaki Hal
    • Journal Title

      Communications in Mathematical Physics

      Volume: 385 Issue: 1 Pages: 79-99

    • DOI

      10.1007/s00220-021-04116-9

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The classification of symmetry protected topological phases of one-dimensional fermion systems2021

    • Author(s)
      Bourne Chris、Ogata Yoshiko
    • Journal Title

      Forum of Mathematics, Sigma

      Volume: 9 Pages: 1-45

    • DOI

      10.1017/fms.2021.19

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A classification of pure states on quantum spin chains satisfying the split property with on-site finite group symmetries2021

    • Author(s)
      Ogata Yoshiko
    • Journal Title

      Transactions of the American Mathematical Society, Series B

      Volume: 8 Issue: 2 Pages: 39-65

    • DOI

      10.1090/btran/51

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Automorphic equivalence within gapped phases in the bulk2020

    • Author(s)
      Moon Alvin、Ogata Yoshiko
    • Journal Title

      Journal of Functional Analysis

      Volume: 278 Issue: 8 Pages: 108422-108422

    • DOI

      10.1016/j.jfa.2019.108422

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Z_2-Index of Symmetry Protected Topological Phases with Time Reversal Symmetry for Quantum Spin Chains2019

    • Author(s)
      Ogata Yoshiko
    • Journal Title

      Communications in Mathematical Physics

      Volume: 374 Issue: 2 Pages: 705-734

    • DOI

      10.1007/s00220-019-03521-5

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Lieb Schultz Mattis Type Theorems for Quantum Spin Chains Without Continuous Symmetry2019

    • Author(s)
      Ogata Tasaki
    • Journal Title

      Communications in Mathematical Physics

      Volume: 1432-0916 Issue: 3 Pages: 1-12

    • DOI

      10.1007/s00220-019-03343-5

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Perturbation Theory of KMS States2019

    • Author(s)
      Ejima S.、Ogata Y.
    • Journal Title

      Annales Henri Poincare

      Volume: 20 Issue: 9 Pages: 2971-2986

    • DOI

      10.1007/s00023-019-00824-0

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Classification of gapped ground state phases in quantum spin systems2022

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Advances in Mathematical Physics: A Conference in Honor of Elliott H. Lieb on his 90th Birthday
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of gapped ground state phases in quantum spin systems2022

    • Author(s)
      Yoshiko Ogata
    • Organizer
      International Congress of Mathematicians 2022 (ICM 2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 量子スピン系におけるギャップ相の分類問題について2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      日本数学会 総合講演
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 量子スピン系における基底状態にギャップを持ったハミルトニアンの分類問題について2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      談話会・数理科学講演会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] An invariant of symmetry protected topological phases with on-site finite group symmetry for two-dimensional Fermion systems2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Webinar “Analysis, Quantum Fields, and Probability”
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Classification of gapped ground state phases in quantum spin systems2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Theoretical studies of topological phases of matter
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of SPT-phases2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Topology and Entanglement in Many-Body Systems (Banff)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of gapped ground state phases in quantum spin systems2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      IHES Quantum Encounters Seminar
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of gapped ground state phases in quantum spin systems2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Seminal Interactions between Mathematics and Physics. II (Rome)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of symmetry protected topological phases in quantum spin systems2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      International Congress in Mathematical Physics (ICMP) 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of symmetry protected topological phases in quantum spin systems2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Summer School on Current Topics in Mathematical Physics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] The classification of symmetry protected topological phases of one-dimensional fermion systems2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      C*-algebras, K-theories and Noncommutative Geometries of Correlated Condensed Matter Systems
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of symmetry protected topological phases in quantum spin chains2021

    • Author(s)
      Yoshiko Ogata
    • Organizer
      CURRENT DEVELOPMENTS IN MATHEMATICS
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of symmetry protected topological phases in quantum spin systems2020

    • Author(s)
      Yoshiko Ogata
    • Organizer
      IAMP ONE WORLD IAMP MATHEMATICAL PHYSICS SEMINAR
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] The classification of symmetry protected topological phases of one-dimensional quantum systems2020

    • Author(s)
      Yoshiko Ogata
    • Organizer
      作用素環論研究者シンポジウム 作用素環論の最近の進展
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Automorphic equivalence within gapped phases in the bulk2020

    • Author(s)
      Yoshiko Ogata
    • Organizer
      East Asian Core Doctoral Forum on Mathematics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of symmetry protected topological phases in quantum spin chain2019

    • Author(s)
      Yoshiko Ogata
    • Organizer
      NCGOA Spring Institute
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of SPT phases in quantum spin chains2019

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Oberwolfach Workshop ID 1937 Many-Body Quantum Systems
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A classification of pure states on quantum spin chains satisfying the split property with on-site finite group symmetries2019

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Oberwolfach Workshop ID 1944 Subfactors and Applications
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classification of symmetry protected topological phases in quantum spin chains2019

    • Author(s)
      Yoshiko Ogata
    • Organizer
      Thematic program Quantum Information. Madrid 2
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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

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