Bianchi cosmology with spinning matter and magnetic field in the einstein-cartain theory

摘要

We present various analytic cosmological solutions of Bianchi type-I model for Weyssen-hoff fluid in the presence of magnetic moment of spinning particles and an external magnetic field wikthin the framework of the Einstein-Cartan theory. In both radiation and atter dominated epochs, when the combined energy arising from matter spin as well as magnetic interaction among particles overcomes the anisotropic energy in the Universe, the initial singularity can be avoided in all stated models.