Einstein-Cartan gravity with scalar-fermion interactions
Abstract
In this paper, we have considered the g-essence and its particular cases, k-essence and f-essence, within the framework of the Einstein-Cartan theory. We have shown that a single fermionic field can give rise to the accelerated expansion within the Einstein-Cartan theory. The exact analytical solution of the Einstein-Cartan-Dirac equations is found. This solution describes the accelerated expansion of the Universe with the equation of state parameter w = -1 as in the case of ΛCDM model.
- Publication:
-
Central European Journal of Physics
- Pub Date:
- February 2012
- DOI:
- arXiv:
- arXiv:1012.5690
- Bibcode:
- 2012CEJPh..10...47R
- Keywords:
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- Einstein-Cartan gravity;
- G-essence;
- K-essence;
- F-essence;
- Astrophysics - Cosmology and Extragalactic Astrophysics;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology;
- High Energy Physics - Theory
- E-Print:
- 6 pages, title is changed