Sv. Vladimirov et Db. Melrose, COVARIANT ELECTROMAGNETIC FORCES IN A TIME-DEPENDENT AND INHOMOGENEOUS-MEDIUM, Physica scripta. T, 57(2), 1998, pp. 298-300
The force density acting on a non-stationary and inhomogeneous dispers
ive medium in the presence of a high-frequency electromagnetic held is
calculated in a covariant formalism. It is demonstrated that the aver
age Lorentz force density due to a wave in the medium can be written u
sing only the Maxwell electromagnetic tensor.