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On the introduction of a boundary in topological field theories

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arxiv 1410.2728 v2 pith:BGZ46MHU submitted 2014-10-10 hep-th

Andrea Amoretti , Alessandro Braggio , Giacomo Caruso , Nicola Maggiore , Nicodemo Magnoli This is my paper
classification hep-th
keywords boundaryfieldtheoriestopologicalactionsappearancescharacterizeconsequences
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We study the consequences of the presence of a boundary in topological field theories in various dimensions. We characterize, univocally and on very general grounds, the field content and the symmetries of the actions which live on the boundary. We then show that these actions are covariant, despite appearances. We show also that physically relevant theories like the 2D Luttinger liquid model, or the 4D Maxwell theory, can be seen as boundary reductions of higher dimensional topological field theories, which do not display local observables.

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  1. Notes from the bulk

    hep-th 2025-07 conditional novelty 4.0 of 10

    A boundary-QFT analysis shows that curved bulk metrics create local edge velocities in topological models and that fracton and linearized-gravity theories carry Kac-Moody boundary algebras.

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