This is an old revision of this page, as edited by JForget (talk | contribs) at 20:34, 31 December 2009 (def). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 20:34, 31 December 2009 by JForget (talk | contribs) (def)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff) | This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Infraparticle" – news · newspapers · books · scholar · JSTOR (December 2009) (Learn how and when to remove this message) |
An infraparticle is an electron. In electrodynamics and quantum electrodynamics, in addition to the global U(1) symmetry related to the electric charge, there are also position dependent gauge transformations. Noether's theorem states that for every infinitesimal symmetry transformation that is local (local in the sense that the transformed value of a field at a given point only depends on the field configuration in an arbitrarily small neighborhood of that point), there is a corresponding conserved charge called the Noether charge, which is the space integral of a Noether density (assuming the integral converges and there is a Noether current satisfying the continuity equation).
Categories: