Dark spinors with torsion in cosmology
Abstract
We solve one of the open problems in Einstein-Cartan theory, namely, we find a natural matter source whose spin angular momentum tensor is compatible with the cosmological principle. We analyze the resulting evolution equations and find that an epoch of accelerated expansion is an attractor. The torsion field quickly decays in that period. Our results are interpreted in the context of the standard model of cosmology.
- Publication:
-
Physical Review D
- Pub Date:
- November 2008
- DOI:
- 10.1103/PhysRevD.78.104001
- arXiv:
- arXiv:0809.0469
- Bibcode:
- 2008PhRvD..78j4001B
- Keywords:
-
- 04.50.-h;
- 04.40.-b;
- Higher-dimensional gravity and other theories of gravity;
- Self-gravitating systems;
- continuous media and classical fields in curved spacetime;
- General Relativity and Quantum Cosmology;
- Astrophysics
- E-Print:
- 7 pages, 3 figures