Angular momentum and the geometrical gauge of localized photon staes
Quantum Physics
2010-07-22 v1
Abstract
Localized photon states have non-zero angular momentum that varies with the non-unique choice of a transverse basis and is changed by gauge transformations of the geometric vector potential . The position operator must depend on the choice of gauge, but a complete gauge transformation of a physically distinct state has no observable effects. The potential has a Dirac string singularity that is related to an optical vortex of the electric field.
Keywords
Cite
@article{arxiv.quant-ph/0408017,
title = {Angular momentum and the geometrical gauge of localized photon staes},
author = {Margaret Hawton and William E. Baylis},
journal= {arXiv preprint arXiv:quant-ph/0408017},
year = {2010}
}