KaluzaKlein cosmology: phenomenology and exact solutions with threecomponent matter.
Abstract
We explain the general fact that Friedmann models in KaluzaKlein cosmologies, in which ordinary spacetime is supplemented by internal factor spaces, are equivalent to the motion of tensorialmass particle in a scalar field. We find exact solutions for an important class of threecomponent matter in the case of one internal space of dimensiond. The three components in question are the curvature of the internal space, the Zeldovich matter, and dust of the protoradiation type. The method includes onecomponent solutions for all the different models of compactification discussed so far.
 Publication:

General Relativity and Gravitation
 Pub Date:
 October 1985
 DOI:
 10.1007/BF00773835
 Bibcode:
 1985GReGr..17..989L
 Keywords:

 Cosmology;
 Matter (Physics);
 Einstein Equations;
 Equations Of State;
 Gravitational Fields;
 Scalars;
 Astrophysics;
 Cosmology:Friedmann Universe