Artículos de revistas
Some remarks on the attractor behaviour in ELKO cosmology
Fecha
2014-08-01Registro en:
Journal Of Cosmology And Astroparticle Physics. Bristol: Iop Publishing Ltd, n. 8, 15 p., 2014.
1475-7516
10.1088/1475-7516/2014/08/020
WOS:000341848800020
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Recent results on the dynamical stability of a system involving the interaction of the ELKO spinor field with standard matter in the universe have been reanalysed, and the conclusion is that such system does not exhibit isolated stable points that could alleviate the cosmic coincidence problem. When a constant parameter delta related to the potential of the ELKO field is introduced in the system however, stable fixed points are found for some specific types of interaction between the ELKO field and matter. Although the parameter delta is related to an unknown potential, in order to satisfy the stability conditions and also that the fixed points are real, the range of the constant parameter delta can be constrained for the present time and the coincidence problem can be alleviated for some specific interactions. Such restriction on the ELKO potential opens possibility to apply the ELKO field as a candidate to dark energy in the universe, and so explain the present phase of acceleration of the universe through the decay of the ELKO field into matter.