5 papers
Inflationary dynamics of non-minimally coupled matter-curvature theories
Miguel Barroso Varela, Orfeu Bertolami, Andreas Mantziris
This study examines how inflationary dynamics are affected by theories with a non-minimal coupling between matter and curvature. Both positive and negative corrections to th…
Density perturbations in nonminimally coupled gravity: symptoms of Lagrangian density ambiguity
Miguel Barroso Varela, Orfeu Bertolami
The evolution of density perturbations is analysed in a modified theory of gravity with a nonminimal coupling between curvature and matter. We consider the broken degeneracy betwee…
Is cosmological data suggesting a nonminimal coupling between matter and gravity?
Miguel Barroso Varela, Orfeu Bertolami
Theoretical predictions from a modified theory of gravity with a nonminimal coupling between matter and curvature are compared to data from recent cosmological surveys. We use type…
Gravitational wave polarizations in nonminimally coupled gravity
Miguel Barroso Varela, Orfeu Bertolami
The properties of metric perturbations are determined in the context of an expanding Universe governed by a modified theory of gravity with a non-minimal coupling between curvature…
Hubble tension in a nonminimally coupled curvature-matter gravity model
Miguel Barroso Varela, Orfeu Bertolami
The presently open problem of the Hubble tension is shown to be removed in the context of a modified theory of gravity with a non-minimal coupling between curvature and matter. By…