131 citations · 457 across the 17 of their papers we have counts for
6 papers · 1 filter
Elie Cartan's torsion in geometry and in field theory, an essay
Friedrich W. Hehl, Yuri N. Obukhov
We review the application of torsion in field theory. First we show how the notion of torsion emerges in differential geometry. In the context of a Cartan circuit, torsion is relat…
Electrodynamics of moving magnetoelectric media: variational approach
Yuri N. Obukhov, Friedrich W. Hehl
Recently, Feigel has predicted a new effect in magnetoelectric media. The theoretical evaluation of this effect requires a careful analysis of a dynamics of the moving magnetoelect…
On the boundary-value problems and the validity of the Post constraint in modern electromagnetism
Yuri N. Obukhov, Friedrich W. Hehl
We recall that the theory of electromagnetism consists of three building blocks: (a) the inhomogeneous Maxwell equations for the electric and magnetic excitations (which re…
Equivalence principle and electromagnetic field: no birefringence, no dilaton, and no axion
Friedrich W. Hehl, Yu. N. Obukhov
The coupling of the electromagnetic field to gravity is discussed. In the premetric axiomatic approach based on the experimentally well established conservation laws of electric ch…
An assessment of Evans' unified field theory II
Friedrich W. Hehl, Yuri N. Obukhov
Evans developed a classical unified field theory of gravitation and electromagnetism on the background of a spacetime obeying a Riemann-Cartan geometry. In an accompanying paper I,…
An assessment of Evans' unified field theory I
Friedrich W. Hehl
Evans developed a classical unified field theory of gravitation and electromagnetism on the background of a spacetime obeying a Riemann-Cartan geometry. This geometry can be charac…