26 citations · 144 across the 10 of their papers we have counts for
3 papers · 1 filter
Conformal inflation with chameleon coupling
Heliudson Bernardo, Renato Costa, Horatiu Nastase +1
We investigate the possibility that the inflaton, in particular in conformal inflation models, is also a chameleon, i.e. that it couples to the energy density of some heavy non-rel…
Point Particle Motion in DFT and a Singularity-Free Cosmological Solution
Robert Brandenberger, Renato Costa, Guilherme Franzmann +1
We generalize the action for point particle motion to a double field theory background. After deriving the general equations of motion for these particle geodesics, we specialize t…
Covariant c-flation: a variational approach
Renato Costa, Rodrigo R. Cuzinatto, Elisa. M. G. Ferreira +1
We develop an action principle to construct the dynamics that give rise to a minimal generalization of Einstein's equations, where the speed of light (), the gravitational const…