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Yu Nakayama24/08/2026, 09:10
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Pavel Putrov24/08/2026, 10:30
The symmetry structure of an $(n+1)$-dimensional quantum field theory is expected to be encoded by a fusion $n$-category. The associated SymTFT, is an $(n+2)$-dimensional topological quantum field theory admitting a natural lattice realization constructed from this categorical data. In this talk, I will discuss what information about the SymTFT can be extracted from multipartite entanglement...
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Iñaki García-Etxebarria24/08/2026, 14:00
I will discuss our recent proposal for the Symmetry Topological Field Theory (SymTFT) for global, continuous spacetime symmetries (https://arxiv.org/abs/2509.07965). For a $d$-dimensional theory, it is given by a $(d+1)$-dimensional $BF$-theory for the spacetime symmetry group, and whenever $d$ is even, it includes also Chern-Simons couplings, that encode conformal and gravitational anomalies....
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Bowen Yang24/08/2026, 15:30
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Kazuya Yonekura25/08/2026, 09:00
Sigma models have interesting generalization which corresponds to group extension in gauge theories. In my talk, I first explain topological structure of sigma models related to sigma model anomalies, and then discuss the extension of sigma models and anomalies when they are coupled to matter fields.
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Mayuko Yamashita25/08/2026, 10:30
I will report the ongoing work with Samuel DeHority, Wenjun Liu and Mykola Semenyakin on the construction of elliptic Coulomb branches. This is an elliptic cohomology version of the existing ordinary/K-theoretic Coulomb branches via the BFN construction. Thanks to the recent development of the theory of elliptic cohomology, we can carry out the construction in genuine equivariant elliptic...
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Sungjay Lee25/08/2026, 14:00
We study the thermal transition between the bounce and the sphaleron in quantum mechanics with a metastable vacuum from the viewpoint of Borel resurgence. For two models representing a second-order and a first-order transition, we compute the perturbative expansion of the thermal free energy to high orders and extract the leading Borel singularity data $(A,b,S)$ as functions of temperature....
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Bowen Yang25/08/2026, 15:30
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Markus Dierigl26/08/2026, 09:00
In this talk I will summarize recent advances in the description of symmetry-breaking defects in quantum gravity theories. These are important to ensure that there are no global symmetries in the UV. In particular, I will analyze global symmetries that originate from topological features of the theory at low-energy and can be associated to deformation classes described by bordism groups. I...
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Ruben Minasian26/08/2026, 10:30
M-theory partition function is well defined on unorientable manifolds. I will discuss some im/applications of this.
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Mirjam Cvetič26/08/2026, 14:00
We present progress on calculation of anomaly coefficients for higher symmetries in quantum field theories (QFTs) both from the perspective of geometric engineering and quiver approaches. Within geometric engineering this data is governed by $\eta$-invariants extracted from the boundary geometry on non-compact Calabi-Yau space $X$. Quiver approach provides a complementary way to extract this...
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Bowen Yang26/08/2026, 15:30
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Kantaro Ohmori27/08/2026, 09:00
I will talk about topological lines and boundaries in $(1+1)d$ fermions that intertwines symmetry charges. Based on a joint work with Yunqin Zheng, Masataka Watanabe, Pengcheng Wei.
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Yichul Choi27/08/2026, 10:30
We discuss aspects of “flat-gauging” in $(1+1)d$ conformal field theories (CFTs). We show how to explicitly compute the dual global symmetries as well as various conformal boundary states of the gauged theory. As an application, we present a full classification of generalized global symmetries of a massless, non-compact free scalar field. We also classify all the conformal boundary states of...
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Rajath Radhakrishnan28/08/2026, 09:00
While a generic quantum field theory may admit infinitely many topological operators, their topological nature imposes strong consistency conditions on their structure. In this talk, I will introduce the notion of dimensional reduction of topological operators and discuss some constraints it imposes in various spacetime dimensions. I will explain how these constraints severely restrict the...
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Du Pei28/08/2026, 10:30
We provide a complete classification of a class of two-dimensional topological quantum field theories with time-reversal symmetry. One of the key ingredients is a generalized Frobenius-Schur indicator, which we also define for line operators in $3d$ TQFTs. We will discuss several applications of the classification to the study of topological phases.
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Justin Kaidi28/08/2026, 14:00
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