Are the pole and the current models equivalent?—The hidden momentum of the Dirac electron

✍ Scribed by Toshio Hosono

• Book ID: 101292869
• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 198 KB
• Volume: 81
• Category: Article
• ISSN: 8756-663X
• DOI: 10.1002/(sici)1520-6432(199803)81:3<1::aid-ecjb1>3.0.co;2-r

✦ Synopsis

There are two models for the magnetic moment: the pole model and the current model. There have been controversies on the equivalence of the two models. They are equivalent with respect to the source of the static magnetic field; the question is whether or not the forces acting on them are equal. Haus and Penfield explained the equivalence of the two models by means of the hidden momentum which the current model is supposed to possess. This paper studies whether or not the Dirac electron has any hidden momentum and shows that it has a hidden momentum that is one half of that asserted in the Haus-Penfield classical model.