Unified Description of Dark Energy and Dark Matter within the Generalized Hybrid Metric-Palatini Theory of Gravity

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 expansi...

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Bibliographic Details
Published in:Universe (Basel) 2020-06, Vol.6 (6), p.78
Main Author: Sá, Paulo M.
Format: Article
Language:English
Subjects:
Cosmology
Dark energy
Dark matter
Gravitational waves
modified gravity
Quantum field theory
Theory of relativity
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Summary: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.
ISSN:2218-1997
2218-1997
DOI:10.3390/universe6060078