The motion of test bodies with microstructure in gauge gravity models

Details The motion of test bodies with microstructure in gauge gravity models The motion of test bodies with microstructure in gauge gravity models

2009-04-02

arxiv.org/abs/0904.0362v1

Acta Phys.Polon.Supp.1:167-172,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, uses Acta Phys. Pol. LaTeX style

Scientific paper

We report on the explicit form of the equations of motion of pole-dipole particles for a very large class of gravitational theories. The non-Riemannian framework in which the equations are derived allows for a unified description of nearly all known gravitational theories. The propagation equations are obtained with the help of a multipole expansion method from the conservation laws that follow from Noether's theorem. The well-known propagation equations of general relativity, e.g., as given by Mathisson and Papapetrou, represent a special case in our general framework. Our formalism allows for a direct identification of the couplings between the matter currents and the gravitational field strengths in gauge gravity models. In particular, it illustrates the need for matter with microstructure for the detection of non-Riemannian spacetime geometries.

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