New general nonstationary balance equations for energy and momentum densities of field–matter system based on rigorous nonstationary approach for their definitions with dependence from the field creation prehistory have been obtained. Also the transport velocities of these densities have been derived. The concrete examination and detailed consideration have been performed for simplest dispersion law which is defined by the conductivity connected with the dissipation.
The general nonstationary balance equations for energy and momentum densities of field-matter system based on rigorous nonstationary approach for their definitions with dependence from the field creation prehistory have been obtained. Also the transport velocities of these densities have been derived. The concrete examination and detailed consideration have been performed for simplest dispersion low which is defined by the conductivity connected with the dissipation.
