%0 Journal Article
%T Relativistic-Covariant Energy-Momentum Tensor for Homogeneous Anisotropic Dispersive Media
%A Alfred W¨šnsche
%J Journal of Modern Physics
%P 1866-1921
%@ 2153-120X
%D 2021
%I Scientific Research Publishing
%R 10.4236/jmp.2021.1213108
%X A new relativistically covariant approach is discussed for the derivation of local conservation theorems for homogeneous anisotropic and, in particular, dispersive media. We start from a three-dimensional operator equation for the electric field and obtain mainly by coordinate-invariant methods the results basically expressed by the slowly varying amplitudes of the electric field. Apart from local energy and momentum conservation formulated by the energy-momentum conservation, we find a local conservation theorem for the action which is more general and which is the only one which remains also true for inhomogeneous media.
%K Spatial and Frequency Dispersion
%K Permittivity Tensor
%K Group Velocity
%K Cold Plasma
%K Coordinate-Invariant Methods
%K Lorentz Group
%K Lorentz Invariants
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=113571