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Theoretical studies of topological phases of matter


Theoretical studies of topological phases of matter
Date December 1st – 5th , 2025
Venue NISSAY Lecture Hall, Graduate School of Mathematical Sciences (Komaba Campus),The University of Tokyo.
Organisers Akira Furusaki
Yasuyuki Kawahigashi
Masatoshi Sato

December 1
  • 9:45 - 10:45 Yasuyuki Kawahigashi (The University of Tokyo) Anton Kapustin(California Institute of Technology)

    Opening〜
    Higher-form symmetries on a lattice and homotopy theory

  • 11:00 - 12:00 Yosuke Kubota(Kyoto University)

    Stable homotopy theory of invertible quantum spin systems I

  • 13:30 - 14:30 Abhishodh Prakash(Harish-Chandra Research Institute)

    Topological families and terminating transitions

  • 14:45 - 15:45 Ken Shiozaki(Kyoto University)

    Matrix product state framework for quantum spin chains with symmetry actions on parameter space

  • 16:00 - 17:00 Qing-Rui Wang (Yau Mathematical Sciences Center, Tsinghua University)

    1+1D Deconfined Quantum Critical Points and the Dual Non-Anomalous Non-Invertible Symmetries

December 2
  • 9:45 - 10:45 Zhengcheng Gu (The Chinese University of Hong Kong)

    Classification and construction of crystalline topological superconductors and insulators in interacting fermion systems

  • 11:00 - 12:00 Markus Pflaum (University of Colorado)

    Homotopical Study of C*-Algebraic Quantum Spin Systems

  • 13:30 - 14:30 Kyle Kawagoe (University of Maryland)

    Levin-Wen is a gauge theory: Entanglement from topology

  • 14:45 - 15:45 Cameron Krulewski (Dalhousie University)

    Free and Interacting Fermionic SPTs and the Bott Spiral

  • 16:00 - 17:00 Shuhei Ohyama (University of Vienna)

    Generalized Cluster States and Strip 2-Algebras

December 3
  • 9:45 - 10:45 Vyacheslav Rychkov (IHES)

    Some rigorous results about the tensor network renormalization group for 2D statistical physics models

  • 11:00 - 12:00 Yosuke Kubota (Kyoto University)

    Stable homotopy theory of invertible quantum spin systems II

December 4
  • 9:45 - 10:45 Clement Delcamp (IHES)

    Entanglement, gapped phases and algebras of order parameters for non-invertible symmetries

  • 11:00 - 12:00 Daniel Grady (Wichita State University)

    Deformation classes of invertible field theories and the Freed-Hopkins conjecture

  • 13:30 - 14:30 Marvin Qi (University of Colorado)

    The Symmetry Taco: a bulk-boundary correspondence for mixed-state phases

  • 14:45 - 15:45 Luuk Stehouwer (Dalhousie University)

    From reflection positivity to higher unitarity: Lessons from TQFT

  • 16:00 - 17:00 Xueda Wen (Georgia Institute of Technology)

    Higher Berry phase and boundary conformal field theories

December 5
  • 9:45 - 10:45 Mayuko Yamashita (Perimeter Institute for Theoretical Physics)

    A merger of elliptic cohomology and global categorical symmetries

  • 11:00 - 12:00 Yosuke Kubota (Kyoto University)

    Stable homotopy theory of invertible quantum spin systems III

  • 13:30 - 14:30 Dominic Williamson (The University of Sydney)

    Universal fault tolerant quantum computation in 2D without getting tied in knots

  • 14:45 - 15:45 Matthew Yu (University of Oxford)

    How to Build Anomalous (3+1)d TQFTs


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