A spin-coefficient approach to Weyssenhoff fluids in Einstein-Cartan theory

Details A spin-coefficient approach to Weyssenhoff fluids in Einstein-Cartan theory A spin-coefficient approach to Weyssenhoff fluids in Einstein-Cartan theory

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gregr..14..137g&link_type=abstract

General Relativity and Gravitation, Volume 14, Issue 2, pp.137-149

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The generalized Newman-Penrose formalism is used to analyze semiclassical aligned spin fluids satisfying the Weyssenhoff restriction in the framework of Einstein-Cartan theory. Some general properties are derived and the formalism is then used to obtain two classes of exact solution. One has a flat metric, but the fluid has in general nonzero acceleration, expansion, and shear. It is characterized by two arbitrary constants and two functions of two variables satisfying one partial differential equation. In the other class the fluid has nonzero acceleration and vorticity, and the free gravitational field is of typeD. It is characterized by three arbitrary constants and an arbitrary function of two spacelike coordinates.

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