69 citations · 157 across the 5 of their papers we have counts for
5 papers
Evolution of density perturbations in decaying vacuum cosmology
H. A. Borges, S. Carneiro, J. C. Fabris +1
We study cosmological perturbations in the context of an interacting dark energy model, in which the cosmological term decays linearly with the Hubble parameter, with concomitant m…
Observational constraints on late-time Lambda(t) cosmology
S. Carneiro, M. A. Dantas, C. Pigozzo +1
The cosmological constant, i.e., the energy density stored in the true vacuum state of all existing fields in the Universe, is the simplest and the most natural possibility to desc…
Non-singular inflation with vacuum decay
Saulo Carneiro
On the basis of a semi-classical analysis of vacuum energy in an expanding spacetime, we describe a non-singular cosmological model in which the vacuum density decays with time, wi…
On the vacuum entropy and the cosmological constant
Saulo Carneiro
It is generally accepted that the entropy of an asymptotically de Sitter universe is bounded by the area, in Planck units, of the de Sitter horizon. Based on an analysis of the ent…
Holography and the Cosmic Coincidence
Saulo Carneiro
Based on an analysis of the entropy associated to the vacuum quantum fluctuations, we show that the holographic principle, applied to the cosmic scale, constitutes a possible expla…