2 papers
gr-qc2021
LyST: a Scalar-Tensor Theory of Gravity on Lyra Manifold
R. R. Cuzinatto, E. M. de Morais, B. M. Pimentel
We present a scalar-tensor theory of gravity on a torsion-free and metric compatible Lyra manifold. This is obtained by generalizing the concept of physical reference frame by cons…
astro-ph.CO2018
Analytic Study of Cosmological Perturbations in a Unified Model of Dark Matter and Dark Energy with a Sharp Transition
Rodrigo R. Cuzinatto, Léo G. Medeiros, Eduardo M. de Morais +1
We study cosmological perturbations in a model of unified dark matter and dark energy with a sharp transition in the late-time universe. The dark sector is described by a dark flui…