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Classification of Phases in Strongly Correlated Quantum Many-Body Systems and Quantum Anomaly in Field Theory

Research Project

Project/Area Number 16K05469
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionThe University of Tokyo

Principal Investigator

OSHIKAWA Masaki  東京大学, 物性研究所, 教授 (50262043)

Research Collaborator FURUYA Shunsuke  
YAO Yuan  
HSIEH Chang-Tse  
KOBAYASHI Ryohei  
FUKUSUMI Yoshiki  
NAKAGAWA Yuya O.  
WATANABE Haruki  
FUJITA Hiroyuki  
SUGIURA Sho  
LU Yuan-Ming  
RAN Ying  
MISGUICH Gregoire  
PASQUIER Vincent  
LO Chung-Yu  
KAO Ying-Jer  
CHEN Pochung  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords量子多体系 / 量子異常 / 量子臨界状態 / 電気分極 / 有限サイズスケーリング / 量子相 / 量子臨界現象 / Lieb-Schultz-Mattis定理 / 量子ホール効果 / 量子スピン鎖 / SU(N)対称性 / 物性基礎論 / 場の理論 / 統計力学 / 反強磁性体 / 数理物理 / 物性理論
Outline of Final Research Achievements

Gapless states, in which the ground state can be modified by an infinitesimal energy, appear not only at quantum phase transition, but also as stable quantum critical phases. In this project, we introduced two novel characterizations of gapless quantum critical states. One is a quantum anomaly, which represents an obstruction against gauging (localizing) both the spin rotation symmetry and translation of spin locations simultaneously. The second is a new exponent characterizing the scaling of the polarization amplitude, which represents the magnitude of the fluctuations of the electric polarization, when the system size is increased.

Academic Significance and Societal Importance of the Research Achievements

ギャップレスな量子臨界状態の理論的・数値的解析はギャップのある相に比較して難しく、未開拓の部分がかなり大きい。本研究で、場の理論において重要な概念である量子異常、また物理的に自然かつ重要な概念である電気分極に基づいて、ギャップレスな量子臨界状態の新たな視点からの分類を行ったことは、ギャップレスな量子臨界状態の包括的な理解に向けた一歩である。実際、本研究を受けて、ギャップレスな量子臨界状態の分類の理論がさまざまな観点から盛んになっており、このような世界的な研究の潮流を作り出す一つの契機を与えた先導的な研究成果であると考えている。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (39 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (8 results) Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 8 results,  Open Access: 5 results,  Acknowledgement Compliant: 1 results) Presentation (23 results) (of which Int'l Joint Research: 21 results,  Invited: 23 results)

  • [Int'l Joint Research] Boston College/Ohio State University(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] 国立台湾大学/国立清華大学(その他の国・地域)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Boston College/Ohio State University/Harvard University(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] CEA Saclay(フランス)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Max-Planck Institute (PKS, Dresden)/Technical University of Munich(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] CEA(フランス)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Max-Planck Institute/Technical University of Munich(ドイツ)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Harvard University/Princeton University/Ohio State University(米国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Crossover of correlation functions near a quantum impurity in a Tomonaga-Luttinger liquid2019

    • Author(s)
      Lo Chung-Yu、Fukusumi Yoshiki、Oshikawa Masaki、Kao Ying-Jer、Chen Pochung
    • Journal Title

      Physical Review B

      Volume: 99 Issue: 12 Pages: 121103-121103

    • DOI

      10.1103/physrevb.99.121103

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Inequivalent Berry Phases for the Bulk Polarization2018

    • Author(s)
      Watanabe Haruki、Oshikawa Masaki
    • Journal Title

      Physical Review X

      Volume: 8 Issue: 2 Pages: 021065-021065

    • DOI

      10.1103/physrevx.8.021065

    • NAID

      130007736149

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Scaling of the polarization amplitude in quantum many-body systems in one dimension2018

    • Author(s)
      Kobayashi Ryohei、Nakagawa Yuya O.、Fukusumi Yoshiki、Oshikawa Masaki
    • Journal Title

      Physical Review B

      Volume: 97 Issue: 16

    • DOI

      10.1103/physrevb.97.165133

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Construction of Hamiltonians by supervised learning of energy and entanglement spectra2018

    • Author(s)
      Fujita Hiroyuki、Nakagawa Yuya O.、Sugiura Sho、Oshikawa Masaki
    • Journal Title

      Physical Review B

      Volume: 97 Issue: 7 Pages: 075114-075114

    • DOI

      10.1103/physrevb.97.075114

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Particle statistics, frustration, and ground-state energy2018

    • Author(s)
      Nie Wenxing、Katsura Hosho、Oshikawa Masaki
    • Journal Title

      Physical Review B

      Volume: 97 Issue: 12

    • DOI

      10.1103/physrevb.97.125153

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Finite-size scaling of the Shannon-R?nyi entropy in two-dimensional systems with spontaneously broken continuous symmetry2017

    • Author(s)
      Misguich Gregoire、Pasquier Vincent、Oshikawa Masaki
    • Journal Title

      Physical Review B

      Volume: 95 Issue: 19

    • DOI

      10.1103/physrevb.95.195161

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Signatures of Dirac Cones in a DMRG Study of the Kagome Heisenberg Model2017

    • Author(s)
      He Yin-Chen、Zaletel Michael P.、Oshikawa Masaki、Pollmann Frank
    • Journal Title

      Physical Review X

      Volume: 7 Issue: 3

    • DOI

      10.1103/physrevx.7.031020

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Symmetry Protection of Critical Phases and a Global Anomaly in 1+1 Dimensions2017

    • Author(s)
      Shunsuke C. Furuya and Masaki Oshikawa
    • Journal Title

      Physical Review Letters

      Volume: 118 Issue: 2 Pages: 021601-021601

    • DOI

      10.1103/physrevlett.118.021601

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Polarization in Quantum Many-Body Systems2019

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Entanglement in Strongly Correlated Systems
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] AKLT and Beyond: Ian Affleck’s contributions to 1D quantum many-body physics2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      30 years of AKLT: Interacting Systems in Low Dimensions
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Orbital Angular Momentum and Current Distribution in Two Dimensional Chiral Superfluids2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      RCQM Spring Workshop Topological superconductors: Materials, topological order, and quenched disorder
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization in Quantum Many-Body Systems2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Quantum Paths Programme, Erwin-Schroedinger Institute
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry and Topology in Gapless Critical Phases2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Symmetry and Topology in Condensed Matter Physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization in Quantum Many-Body Systems2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Topological phases of matter: from the quantum Hall effect to spin liquids
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Gauge Invariance and Stability of π-flux Critical Phases2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      673rd Wilhelm und Else Heraeus-Seminar Trends in Quantum Magnetism
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Anomaly and Symmetry-Protected Critical Phases2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Perspectives in Topological Phases: From Condensed Matter to High-Energy Physics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization in Insulators and Conductors2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Trends in Theory of Correlated Materials 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization in Many-Body Systems2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Wolfgang-Pauli Centre Theoretical Symposium 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry-protected critical phases and global anomaly2018

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Croucher Advanced Institute “Topology in Condensed Matter and High-Energy Physics”
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] トポロジカル相としてのスピン液体とキタエフ模型2018

    • Author(s)
      押川正毅
    • Organizer
      日本物理学会 第73回年次大会 (シンポジウム)
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Polarization, Gauge Invariance, and Quantum Hall Effect on Lattice2017

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Cocycling in Flanders
    • Place of Presentation
      Het Pand, Ghent, Belgium
    • Year and Date
      2017-03-29
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization, Gauge Invariance, and Quantum Hall Effect on Lattice2017

    • Author(s)
      Masaki Oshikawa
    • Organizer
      NORDITA Conference “Frontiers of topological quantum matter”
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] From Haldane gap to filling-enforced constraints in quantum many-particle systems2017

    • Author(s)
      Masaki Oshikawa
    • Organizer
      The 3rd Conference on Condensed Matter Physics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization, Gauge Invariance, and Filling-Enforced Constraints2017

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Workshop on Electron-Electron Interactions in Topological Materials
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Haldane現象からの理論的展開2017

    • Author(s)
      押川正毅
    • Organizer
      日本物理学会 2017年秋季大会(シンポジウム)
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Signatures of Dirac Cones in Kagome Heisenberg Antiferromagnets2016

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Max PIanck-UBC-UTokyo Workshop on Quantum Materials
    • Place of Presentation
      University of Tokyo, Hongo, Tokyo, Japan
    • Year and Date
      2016-12-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Symmetry Protection of Critical Phases and Global Anomaly in 1+1 Dimensions2016

    • Author(s)
      Masaki Oshikawa
    • Organizer
      627th WE-Heraeus Seminar "Low dimensional quantum systems: models and materials"
    • Place of Presentation
      Phyzikzentrum Bad Honnef, Germany
    • Year and Date
      2016-10-31
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization, Gauge Invariance, and Quantum Hall Effect on Lattice2016

    • Author(s)
      Masaki Oshikawa
    • Organizer
      KITP Conference "Topological Quantum Matter"
    • Place of Presentation
      Kavli Institute for Theoretical Physics, University of California Santa Barbara, USA
    • Year and Date
      2016-10-17
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization and Gauge Invariance2016

    • Author(s)
      Masaki Oshikawa
    • Organizer
      BIRS Workshop "Geometrical Degrees of Freedom in Topological Phases"
    • Place of Presentation
      Banff International Research Station, Banff, Canada
    • Year and Date
      2016-08-21
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Renyi-Shannon Entropy and Boundary Field Theory2016

    • Author(s)
      Masaki Oshikawa
    • Organizer
      YKIS2016 "Quantum Matter, Spacetime and Information"
    • Place of Presentation
      Yukawa Institute for Theoretical Physics, Kyoto University
    • Year and Date
      2016-06-13
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Polarization and Large Gauge Invariance2016

    • Author(s)
      Masaki Oshikawa
    • Organizer
      Trends in Theory of Correlated Materials
    • Place of Presentation
      Paul Scherrer Institut, Villigen, Switzerland
    • Year and Date
      2016-05-22
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2016-04-21   Modified: 2022-02-21  

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