2014/02/28 by S. H. Pereira, S.H. Pereira, A. Pinho S. S. +3 · 2 citations
Physics and Astronomy · #Attractor #COSMIC cancer database #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Field (mathematics) #Inflation (cosmology) #Relativity and Gravitational Theory #Spinor #Standard Model (mathematical formulation) #Universe #gr-qc
paper · pdf · doi:10.1088/1475-7516/2014/08/020
published as JCAP08(2014)020 · 17 pages, section III with minor changes and section IV rewritten with a new analysis
arxiv created 2014/08/08 · openalex publication_date 2014/08/08 · arxiv updated 2015/02/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
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 δ 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 δ 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 δ 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.