137 citations · 443 across the 5 of their papers we have counts for
6 papers
Cosmological perturbations in theories with non-minimal coupling between curvature and matter
Orfeu Bertolami, Pedro Frazão, Jorge Páramos
In this work, one examines how the presence of a non-minimal coupling between the spacetime curvature and matter affects the evolution of cosmological perturbations around a homoge…
Mimicking dark matter in galaxy clusters through a non-minimal gravitational coupling with matter
Orfeu Bertolami, Pedro Frazão, Jorge Páramos
In this work, one shows that a specific non-minimal coupling between the scalar curvature and matter can mimic the dark matter component of galaxy clusters. For this purpose, one a…
Reheating via a generalized non-minimal coupling of curvature to matter
Orfeu Bertolami, Pedro Frazão, Jorge Páramos
In this work one shows that a generalized non-minimal coupling between geometry and matter is compatible with Starobinsky inflation and leads to a successful process of preheating,…
Accelerated expansion from a non-minimal gravitational coupling to matter
O. Bertolami, P. Frazao, J. Páramos
It is shown that a non-minimal coupling between the scalar curvature and the matter Lagrangian density may account for the accelerated expansion of the Universe and provide, throug…
Gravitons production in a new type of GCG
Mariam Bouhmadi-Lopez, Pedro Frazao, Alfredo B. Henriques
A new scenario for the early era of the Universe is proposed. It corresponds to a smooth transition between a de Sitter-like phase and a radiation dominated era. We calculate the p…
Stochastic gravitational waves from a new type of modified Chaplygin gas
Mariam Bouhmadi-Lopez, Pedro Frazao, Alfredo B. Henriques
We propose a new scenario for the early universe where there is a smooth transition between an early de Sitter-like phase and a radiation dominated era. In this model, the matter c…