Invited Talks
18 June 2026 · 5:10–5:35 PM
Symmetric Gapped States and Symmetry-Enforced Gaplessness in 3-dimension
This talk develops a framework for classifying the infrared phases of fermionic quantum theories in three spatial dimensions using finite-symmetry anomalies. It distinguishes anomalies compatible with symmetric gapped states from those that enforce gaplessness, with applications to (3+1)-dimensional gauge theories.
9 April 2026
Anomalies in topological orders: from algebraic topology to physical realisations
This talk explains how anomalous symmetry actions in topological orders can be formalised as lifting obstructions in algebraic topology, and how those obstructions constrain physical realisations.
31 January 2026
Symmetric Gapped States and Symmetry-Enforced Gaplessness in 3-dimension
This talk develops a framework for classifying the infrared phases of fermionic quantum theories in three spatial dimensions using finite-symmetry anomalies. It distinguishes anomalies compatible with symmetric gapped states from those that enforce gaplessness, with applications to (3+1)-dimensional gauge theories.
4 March 2024 · 5:12–5:24 PM
Lieb-Schultz-Mattis constraints in 3D: application to the pyrochlore and the diamond lattices
This presentation relates lattice-homotopy and anomaly formulations of Lieb-Schultz-Mattis constraints, deriving complete constraints for pyrochlore, diamond, and breathing-pyrochlore magnets.