Asymptotic $U(1)$ charges at spatial infinity
High Energy Physics - Theory
2018-01-17 v1 General Relativity and Quantum Cosmology
Abstract
Large gauge symmetries in Minkowski spacetime are often studied in two distinct regimes: either at asymptotic (past or future) times or at spatial infinity. By working in harmonic gauge, we provide a unified description of large gauge symmetries (and their associated charges) that applies to both regimes. At spatial infinity the charges are conserved and interpolate between those defined at the asymptotic past and future. This explains the equality of asymptotic past and future charges, as recently proposed in connection with Weinberg's soft photon theorem.
Cite
@article{arxiv.1703.07884,
title = {Asymptotic $U(1)$ charges at spatial infinity},
author = {Miguel Campiglia and Rodrigo Eyheralde},
journal= {arXiv preprint arXiv:1703.07884},
year = {2018}
}
Comments
23 pages