Thermal fluctuations in Einstein-Cartan-Sciama-Kibble-Dirac bouncing cosmology
Cosmology and Nongalactic Astrophysics
2012-01-05 v1 General Relativity and Quantum Cosmology
Abstract
We study cosmological perturbations arising from thermal fluctuations in the big-bounce cosmology in the Einstein-Cartan-Sciama-Kibble theory of gravity. We show that such perturbations cannot have a scale-invariant spectrum if fermionic matter minimally coupled to the torsion tensor is macroscopically averaged as a spin fluid, but have a scale-invariant spectrum if the Dirac form of the spin tensor of the fermionic matter is used.
Cite
@article{arxiv.1201.0316,
title = {Thermal fluctuations in Einstein-Cartan-Sciama-Kibble-Dirac bouncing cosmology},
author = {Nikodem J. Poplawski},
journal= {arXiv preprint arXiv:1201.0316},
year = {2012}
}
Comments
4 pages