preprintJournal of High Energy PhysicsApr 20, 2026DIAMOND OA

SymTh for non-finite symmetries

University of Padua · Istituto Nazionale di Fisica Nucleare, Sezione di Padova · +2 more institutions

Indexed inarxivcrossrefdatacitedoaj

Abstract

A bstract Symmetry topological field theory (SymTFT) is a convenient tool for studying finite generalized symmetries of a given quantum field theory (QFT). In particular, SymTFTs encode all the symmetry structures and properties, including anomalies. Recently, this tool has been applied for non-finite symmetries as well. In this paper, we take a different route, which consists of considering a free theory rather than a topological field theory in the bulk. We call it Symmetry Theory (SymTh). We study its topological operators together with the free boundary conditions. We also propose a procedure that is analogous to the sandwich construction of SymTFTs and allows us to obtain the physical QFT. We apply this…

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