On the theory of the skewon field: From electrodynamics to gravity

F. W. Hehl, Yu. N. Obukhov, G. F. Rubilar +1

The Maxwell equations expressed in terms of the excitation $\stackrel{˝}{=}(\mathcal{H},\mathcal{D})$ and the field strength $F=(E,B)$ are metric-free and require an additional constitutive law in…