4 papers · 1 filter
Energy Detectors and Asymptotic Symmetries
Hernán A. González, Jakob Salzer
We study detector operators measuring energy to a power at null infinity in four-dimensional gauge theories and gravity. These operators transform as conformal primaries on t…
Matching conditions at null infinity in the presence of logarithms: the role of advanced and retarded radiation
Matías Briceño, Hernán A. González, Marc Henneaux +1
We provide a new perspective on the general matching conditions between the future of past null infinity and the past of future null infinity, emphasizing the impact of dominant lo…
Asymptotic structure of scalar-Maxwell theory at the null boundary
Hernán A. González, Oriana Labrin, Olivera Miskovic
We apply the Hamiltonian formalism to investigate the massless sector of scalar field theory coupled with Maxwell electrodynamics through the Pontryagin term. Specifically, we anal…
Chiral shift symmetries as an infinite tower of subleading super-shift symmetries
Glenn Barnich, Luca Ciambelli, Hernán A. González
Chiral shift symmetries of the massless free bosons in two dimensions are global symmetries that are somewhat similar to asymptotic symmetries. They are most transparent in double-…