ICTP lectures on (non-) invertible generalized symmetries

S Schäfer-Nameki - Physics Reports, 2024 - Elsevier
What comprises a global symmetry of a Quantum Field Theory (QFT) has been vastly
expanded in the past 10 years to include not only symmetries acting on higher-dimensional …

Lectures on generalized symmetries

L Bhardwaj, LE Bottini, L Fraser-Taliente, L Gladden… - Physics Reports, 2024 - Elsevier
These are a set of lecture notes on generalized global symmetries in quantum field theory.
The focus is on invertible symmetries with a few comments regarding non-invertible …

Generalized charges, part I: Invertible symmetries and higher representations

L Bhardwaj, S Schäfer-Nameki - SciPost Physics, 2024 - scipost.org
Abstract $ q $-charges describe the possible actions of a generalized symmetry on $ q $-
dimensional operators. In Part I of this series of papers, we describe $ q $-charges for …

Gapped phases with non-invertible symmetries:(1+ 1) d

L Bhardwaj, LE Bottini, D Pajer, S Schäfer-Nameki - SciPost Physics, 2025 - scipost.org
We propose a general framework to characterize gapped infra-red (IR) phases of theories
with non-invertible (or categorical) symmetries. In this paper we focus on (1+ 1) d gapped …

Generalized charges, part II: Non-invertible symmetries and the symmetry TFT

L Bhardwaj, S Schafer-Nameki - arxiv preprint arxiv:2305.17159, 2023 - arxiv.org
Consider a d-dimensional quantum field theory (QFT) $\mathfrak {T} $, with a generalized
symmetry $\mathcal {S} $, which may or may not be invertible. We study the action of …

Anomalies of -dimensional categorical symmetries

C Zhang, C Córdova - Physical Review B, 2024 - APS
We present a general approach for detecting when a fusion category symmetry is
anomalous, based on the existence of a special kind of Lagrangian algebra of the …

Remarks on boundaries, anomalies, and noninvertible symmetries

Y Choi, BC Rayhaun, Y Sanghavi, SH Shao - Physical Review D, 2023 - APS
What does it mean for a boundary condition to be symmetric with respect to a noninvertible
global symmetry? We discuss two possible definitions in 1+ 1 D QFTs and lattice models. On …