Fermions in Brans-Dicke cosmology
L.L. Samojeden, F.P. Devecchi, G.M. Kremer
TL;DR
This paper explores how fermionic fields within Brans-Dicke cosmology can drive the universe's transition from matter domination to accelerated expansion, highlighting a potential role for fermions in cosmic evolution.
Contribution
It introduces a model combining fermionic fields and Brans-Dicke scalar fields to explain late-time cosmic acceleration, which is a novel approach in this context.
Findings
Fermionic fields can induce accelerated expansion in Brans-Dicke cosmology.
The model shows a transition from matter dominance to acceleration.
Fermions and scalar fields together can explain late-time acceleration.
Abstract
Using the Brans-Dicke theory of gravitation we put under investigation a hypothetical universe filled with a fermionic field (with a self interaction potential) and a matter constituent ruled by a barotropic equation of state. It is shown that the fermionic field (in combination with the Brans-Dicke scalar field) could be responsible for a final accelerated era, after an initial matter dominated period.
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