On redefinitions of the energy momentum tensor
Abstract
We analyse some redefinitions of the energymomentum tensor of Classical Electrodynamics. Usually it has been considered as a necessary and sufficient criterion for redefining the energymomentum tensor that the new tensor yields the "true" equation of motion of the electron, that is, the LorentzDirac equation. We show that such a property is not sufficient. In fact, we study two specific examples in which the redefined energy momentum tensor yields a LorentzDirac equation. However, in both cases the corresponding rate of emission associated to them is different to the wellknown Larmor rate.
 Publication:

Annals of Physics
 Pub Date:
 January 1975
 DOI:
 10.1016/00034916(75)903036
 Bibcode:
 1975AnPhy..89..241V
 Keywords:

 Dirac Equation;
 Electrodynamics;
 Energy Conservation;
 Momentum Theory;
 Tensors;
 Lorentz Transformations;
 Maxwell Equation;
 Perturbation Theory;
 Physics (General)