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Unified description of dark energy and dark matter within the generalized hybrid metric-palatini theory of gravity
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Resumo(s)
The generalized hybrid metric-Palatini theory of gravity admits a scalar-tensor
representation in terms of two interacting scalar fields. We show that, upon an appropriate choice
of the interaction potential, one of the scalar fields behaves like dark energy, inducing a late-time
accelerated expansion of the universe, while the other scalar field behaves like pressureless dark
matter that, together with ordinary baryonic matter, dominates the intermediate phases of cosmic
evolution. This unified description of dark energy and dark matter gives rise to viable cosmological
solutions, which reproduce the main features of the evolution of the universe.
Descrição
Palavras-chave
Modified gravity Dark matter Dark energy
Contexto Educativo
Citação
Editora
MDPI