Cosmological model with non-minimally coupled fermionic field
| dc.creator | Ribas, M. O. | |
| dc.creator | Devecchi, F. P. | |
| dc.creator | Kremer, G. M. | |
| dc.date | 2007-10-26 | |
| dc.date.accessioned | 2026-07-07T11:38:22Z | |
| dc.date.available | 2026-07-07T11:38:22Z | |
| dc.description | A model for the Universe is proposed whose constituents are: (a) a dark energy field modeled by a fermionic field non-minimally coupled with the gravitational field, (b) a matter field which consists of pressureless baryonic and dark matter fields and (c) a field which represents the radiation and the neutrinos. The coupled system of Dirac's equations and Einstein field equations is solved numerically by considering a spatially flat homogeneous and isotropic Universe. It is shown that the proposed model can reproduce the expected red-shift behaviors of the deceleration parameter, of the density parameters of each constituent and of the luminosity distance. Furthermore, for small values of the red-shift the constant which couples the fermionic and gravitational fields has a remarkable influence on the density and deceleration parameters. | |
| dc.description | Accepted for publication in Europhysics Letters | |
| dc.identifier | https://arxiv.org/abs/0710.5155 | |
| dc.identifier | http://arxiv.org/abs/0710.5155 | |
| dc.identifier | Europhys.Lett.81:19001,2008 | |
| dc.identifier | doi:10.1209/0295-5075/81/19001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/199536 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Cosmological model with non-minimally coupled fermionic field | |
| dc.type | text |