131 citations · 457 across the 17 of their papers we have counts for
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A formal framework for a nonlocal generalization of Einstein's theory of gravitation
Friedrich W. Hehl, Bahram Mashhoon
The analogy between electrodynamics and the translational gauge theory of gravity is employed in this paper to develop an ansatz for a nonlocal generalization of Einstein's theory…
Nonlocal Gravity Simulates Dark Matter
Friedrich W. Hehl, Bahram Mashhoon
A nonlocal generalization of Einstein's theory of gravitation is constructed within the framework of the translational gauge theory of gravity. In the linear approximation, the non…
Maxwell's equations in Minkowski's world: their premetric generalization and the electromagnetic energy-momentum tensor
Friedrich W. Hehl
In December 1907, Minkowski expressed the Maxwell equations in the very beautiful and compact 4-dimensional form: lor f=-s, lor F^*=0. Here `lor', an abbreviation of Lorentz, repre…
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…
Relativistic analysis of magnetoelectric crystals: extracting a new 4-dimensional P odd and T odd pseudoscalar from Cr_2 O_3 data
Friedrich W. Hehl, Yuri N. Obukhov, Jean-Pierre Rivera +1
Earlier, the linear magnetoelectric effect of chromium sesquioxide Cr_2 O_3 has been determined experimentally as a function of temperature. One measures the electric field-induced…
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…