Friedmannlike cosmological models without singularity
Abstract
The EinsteinCartan theory of gravitation (“general relativity with spin”) provides a specific spinspin contact interaction of matter, in addition to the usual longrange 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 EinsteinCartan equations are valid at a microphysical level, and some spinspin 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 EinsteinCartan theory. These models can be made free from singularity, thanks to the selfinteraction of spinning fluid.
 Publication:

General Relativity and Gravitation
 Pub Date:
 June 1978
 DOI:
 10.1007/BF00759545
 Bibcode:
 1978GReGr...9..511K
 Keywords:

 Big Bang Cosmology;
 Gravitation Theory;
 Relativity;
 Singularity (Mathematics);
 Einstein Equations;
 Random Processes;
 Spin;
 Statistical Distributions;
 Astrophysics