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This lecture explores the intricacies of Quantum Electrodynamics (QED) in 2+1 dimensions, presented by Thomas Dumitrescu from UCLA at the Generalized Symmetries conference held at the Kavli Institute for Theoretical Physics (KITP). Delve into the advancements made in quantum field theory over the past decade, particularly how symmetries can be interpreted through topological defects acting on operator spaces. Learn about this generalized notion of symmetries implemented through Lagrangian field theory techniques, which has revealed unexpected physical phenomena across condensed matter, high energy physics, and quantum gravity. The talk is part of a broader conference bringing together experts to discuss recent advances and open problems in the field, coordinated by Maissam Barkeshli, Michele Del Zotto, Sakura Schafer-Nameki, and Shu-Heng Shao.
