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Abstract |
Gauge theories defined on manifolds with boundaries, be they asymptotic or at finite
distance, exhibit emergent boundary degrees of freedom, sometimes referred to as edge
modes. Recently, two important developments have been the realization that edge modes
do even appear and play a role on fictitious entangling interfaces, and are related to the
intricate asymptotic and infrared properties of theories with massless excitations, where
they appear via so-called large gauge transformations and soft modes. In this talk I will
review some of these results, and explain how they can be understood by a suitable
generalization of the covariant phase space formalism. |
