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111 papers
Violating Lorentz invariance minimally by the emergence of nonmetricity? A Perspective
Yuri N. Obukhov, Friedrich W. Hehl
Lorentz invariance belongs to the fundamental symmetries of nature. It is basic for the successful Standard Model of Particle Physics. Nevertheless, within the last decades, Lorent…
Nonmetricity and hypermomentum: on the possible violation of Lorentz invariance
Yuri N. Obukhov, Friedrich W. Hehl
We outline how the symmetry groups of spacetime are interpreted in a gauge-theoretic approach. Specifically, we focus on the hypermomentum concept and discuss the hyperfluid, that…
Motion of Test Particles in Spacetimes with Torsion and Nonmetricity
Danianos Iosifidis, Friedrich W. Hehl
We derive the equations of motion of a test particle with intrinsic hypermomentum in spacetimes with both torsion and nonmetricity (along with curvature ). Accordingly,…
Hyperfluid model revisited
Yuri N. Obukhov, Friedrich W. Hehl
A new variational theory of a hyperfluid is constructed which is free of the supplementary condition issue and provides a consistent model of the classical matter source in the met…
Four Lectures on Poincaré Gauge Field Theory
Friedrich W. Hehl
The Poincaré (inhomogeneous Lorentz) group underlies special relativity. In these lectures a consistent formalism is developed allowing an appropriate gauging of the Poincaré group…
General relativity as a special case of Poincaré gauge gravity
Yuri N. Obukhov, Friedrich W. Hehl
We demonstrate that Einstein's general relativity theory arises as a special case in the framework of the Poincaré gauge theory of gravity under the assumption of a suitable nonmin…