Talks

Some recorded talks:

2026-07-15, “On boundary conditions of quantum field theories,” Bernoulli Center · EPFL. EPFL recording
2026-06-25, “Gauge theory and skein modules,” String-Math 2026 · Edinburgh. Organizer video Bilibili mirror
2025-07/08, “On the space of quantum field theories,” Lecture series · YMSC, Tsinghua University. Lecture recordings
2025-07-21, “On boundary conditions and phases of quantum field theories,” ICBS 2025 · BIMSA, Beijing. YouTube
2024-08, “Topological modular forms (lectures 1–3),” Fourth String Theory, Field Theory and Holography summer school, Southeast University. (in Chinese) Lecture 1 — Bilibili Lecture 2 — Bilibili Lecture 3 — Bilibili
2024-06-03, “Topological modular forms and phases of quantum field theories,” BPS Dynamics and Quantum Mathematics · GGI, Florence. YouTube
2022-10-31 / 11-03, “VOAs from higher-dimensional QFTs,” Four-lecture mini-course · CRM, Montréal. Lecture I · YouTube Lecture II · YouTube Lecture III · YouTube Lecture IV · YouTube
2022-04-12, “Holomorphic CFTs and topological modular forms,” High Energy Theory seminar · Rutgers University. Rutgers video
2020-11, “TQFTs from Coulomb branches,” School–Conference on Vertex Algebras and Tensor Categories. YouTube collection Bilibili · lecture 1 Bilibili · lecture 2
2020-11, “Modularities from fivebranes,” Modularity in Quantum Systems · KITP. KITP recording
2020-07, “On compactifications of 6d relative theories,” String-Math 2020 · online. Conference recording
2019-08, “Physics and geometry of BPS states,” Introductory Workshop: Holomorphic Differentials in Mathematics and Physics · MSRI. Lecture 1 Lecture 2 Lecture 3
2018-12, “Modular tensor categories from the Coulomb branch,” Gauge Theory and Vertex Algebra · SCGP. SCGP recording
2018-11, “On new homological and homotopy-theoretic invariants of manifolds,” Quantum Knot Invariants and Supersymmetric Gauge Theories · KITP. KITP recording
2018-09-24, “Modular tensor categories from wild Higgs bundles,” Geometric and Categorical Aspects of CFTs · BIRS, Oaxaca. BIRS recording
2018-09-14, “Wild Higgs bundles and modular categories,” Geometry and Physics of Quantum Curves · BIRS, Banff. BIRS recording
2018-07, “On mirror symmetry of (B,A,A)-branes,” Quantum Fields, Geometry and Representation Theory · ICTS, Bangalore. ICTS recording
2018-04, “On categorification of the WRT invariant,” Categorification in Mathematical Physics · SCGP. SCGP recording
2016-09, “The Verlinde formula for Higgs bundles,” Hitchin 70 · QGM, Aarhus. QGM recording archive
2014-11, “Equivariant integration over Hitchin moduli space,” Gauged Sigma-Models in Two Dimensions · SCGP. SCGP recording

Other recent talks:

2026-09-30 / 10-07, “Gauge theory and skein modules I & II.” GRASP seminar · BIMSA, online. Event page
2026-09-10, “6d theories and 4-manifolds.” Gauge Theory, Topology, and Physics · OIST. Event page
2026-08-28, “On the classification of 2d TQFTs with time-reversal symmetry.” Physics and Mathematics of Generalized Symmetry in QFT · Kavli IPMU. Event page
2026-08-11, “On classifications of defects in quantum field theories.” Workshop on Generalized Symmetries in HEP and CMP 2026, Institute of Physics, CAS, Beijing. Event page
2026-05-07, “Gauge theory and skein modules.” Algebra, Geometry and Topology Seminar, Institute of Science and Technology Austria (ISTA). Event page
2025-12-19, “On moduli spaces of T[M] theories.” Yau Center, Southeast University, online. Event page