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Microscopic construction of strongly-correlated topological phases and the study on thier phase structures

Research Project

Project/Area Number 18K03455
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
Research InstitutionKyoto University

Principal Investigator

Totsuka Keisuke  京都大学, 基礎物理学研究所, 准教授 (80291079)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsトポロジカル相 / 冷却原子気体 / 量子細線 / カイラルスピン液体 / 熱ホール効果 / トリプロン / 分数量子ホール効果 / 対称性に護られたトポロジカル相 / coupled-wire構成法 / 強相関系 / 量子ホール効果 / 強相関 / トポロジカル秩序 / ラッティンジャー液体
Outline of Final Research Achievements

Symmetry-protected topological phases, especially those breaking reflection symmetry spontaneously, attract much attention recently in condensed-matter physics. We have shown, by means of analytical and numerical methods, that these can be realized with ultra-cold fermions trapped in a double-well optical lattice. Furthermore, through the cutting-edge numerical methods, we have established that the non-Abelian chiral spin liquids are realized in SU(N) cold-atom Mott insulators on a square lattice up to N=10.
Coupled-wire construction is a new appealing way of realizing two and three-dimensional topological phases by coupling quantum wires. We have clarified how non-trivial wave functions and topological gauge field theories in the bulk emerge in these coupled arrays of quantum wires.

Academic Significance and Societal Importance of the Research Achievements

対称性に護られたトポロジカル(SPT)相は近年数学的な分類学は大いに発展したが、現実的な物理系での実現可能性についてはそれほど理解が進んでこなかった。二重井戸光格子は実際に実現されてその理解が進んでおり、これを利用したSPT相についての理論結果は今後のSPT相の実現・検証の上で重要な役割を果たすと思われる。また、正方格子上のSU(N)モット絶縁体における非可換カイラルスピン液体の研究は、少数の例外を除けばこれまで比較的複雑で、非現実的な系でしか実現することがわかっていなかった物質相であり、比較的簡単な系でそれが普遍的に存在することは、今後の理論的理解、量子計算などへの応用上も重要である。

Report

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

    (22 results)

All 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (9 results) Journal Article (7 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 7 results) Presentation (6 results) (of which Int'l Joint Research: 6 results,  Invited: 6 results)

  • [Int'l Joint Research] Toulouse university/Grenoble university(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] マックスプランク量子光学研究所/ミュンヘン大学/ドレスデン工科大学(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Toulouse大学(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Toulouse大学/CEA Saclay/Cergy-Pontoise大学(フランス)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Stckholm大学(スウェーデン)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Ben Grion大学(イスラエル)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Cergy-Pontoise university/Toulouse university(フランス)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Stockholm university(スウェーデン)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] KAIST(韓国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Intrinsic suppression of the topological thermal Hall effect in an exactly solvable quantum magnet2022

    • Author(s)
      S. Suetsugu, T. Yokoi, K. Totsuka, T. Ono, I. Tanaka, S. Kasahara, Y. Kasahara, Z. Chengchao, H. Kageyama, and Y. Matsuda
    • Journal Title

      Physical Review B

      Volume: 105 Issue: 2 Pages: 024415-024415

    • DOI

      10.1103/physrevb.105.024415

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Abelian SU(N)_1 chiral spin liquids on the square lattice2021

    • Author(s)
      Ji-Yao Chen, Jheng-Wei Li, Pierre Nataf, Sylvain Capponi, Matthieu Mambrini, Keisuke Totsuka, Hong-Hao Tu, Andreas Weichselbaum, Jan von Delft, and Didier Poilblanc
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 23

    • DOI

      10.1103/physrevb.104.235104

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Symmetry-protected topological phases in a two-leg SU(N) spin ladder with unequal spins2020

    • Author(s)
      S. Capponi, P. Fromholz, P. Lecheminant, and K. Totsuka
    • Journal Title

      Phys. Rev. B

      Volume: 101 Pages: 005100-005100

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] New Surprises from ``Bamboo Baskets''2020

    • Author(s)
      K. Totsuka
    • Journal Title

      JPSJ News Comments

      Volume: 17 Pages: 03-03

    • DOI

      10.7566/jpsjnc.17.03

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Non-Abelian Aharonov-Casher Phase Factor in Mesoscopic Systems2019

    • Author(s)
      Y. Avishai, K. Totsuka, and N. Nagaosa
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 88 Issue: 8 Pages: 084705-084705

    • DOI

      10.7566/jpsj.88.084705

    • NAID

      40021971864

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] From coupled-wire construction of quantum Hall states to wave functions and hydrodynamic2019

    • Author(s)
      Y. Imamura, K. Totsuka, and T.H. Hansson
    • Journal Title

      Phys. Rev. B

      Volume: 100 Issue: 12

    • DOI

      10.1103/physrevb.100.125148

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Haldane phases with ultracold fermionic atoms in double-well optical lattices2019

    • Author(s)
      P. Fromholz, S. Capponi, P. Lecheminant, D. Papoular, and K. Totsuka
    • Journal Title

      Physical Reviiew B

      Volume: 99

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Designing topological gauge theories with quantum wires2021

    • Author(s)
      Keisuke Totsuka
    • Organizer
      Entanglement in strongly correlated systems
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry-protected topological phases with ultra-cold SU(N) fermions2019

    • Author(s)
      K. Totsuka
    • Organizer
      The Fourth Kyoto-Beijing-Tokyo Workshop on Ultracold Atomic Gases
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Exploring 1D Symmetry-protected topological phases with ultra-cold SU(N) fermion gases2019

    • Author(s)
      K. Totsuka
    • Organizer
      3rd Asia-Pacific workshop on Quantum Magnetism
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Emergent gauge theories from a coupled array of wires2018

    • Author(s)
      K. Totsuka
    • Organizer
      TOPMAT 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry-protected topological phases with broken parity in cold fermions in a double-well optical lattice2018

    • Author(s)
      K. Totsuka
    • Organizer
      Quantum Magnetism: Frustration, Low-dimensionality, Topology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Hunt for symmetry-protected topological phases in SU(N) ultra-cold fermions in double-well optical lattices2018

    • Author(s)
      K. Totsuka
    • Organizer
      BEC2018X
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2018-04-23   Modified: 2023-01-30  

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