Friedmann-like cosmological models without singularity |
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Authors: | Bronisław Kuchowicz |
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Institution: | (1) Department of Radiochemistry and Radiation Chemistry, University of Warsaw, ul. Zwirki i Wigury 101, 02-089 Warszawa, Poland;(2) Present address: Copernicus Astronomy Center, Polish Academy of Sciences, Warsaw, Poland |
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Abstract: | The Einstein-Cartan theory of gravitation (general relativity with spin) provides a specific spin-spin contact interaction of matter, in addition to the usual long-range gravity. This new interaction enables us to prevent singularities in Cosmological models. It is shown how this mechanism works in the case when the standard Einstein-Cartan equations are valid at a microphysical level, and some spin-spin terms remain from the averaging procedure for randomly distributed spins. In contrast with the case of aligned spin distributions, it is possible to take over the isotropic and spatially homogeneous (i.e., Friedmannian) models into the Einstein-Cartan theory. These models can be made free from singularity, thanks to the self-interaction of spinning fluid. |
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