296 citations · 6.5k across the 170 of their papers we have counts for
9 papers · 1 filter
-exponential inflation
J. S. Alcaniz, F. C. Carvalho
An inflationary scenario driven by a slow rolling homogeneous scalar field whose potential is given by a generalized exponential function is discussed. Within the {\sl slow-…
Simplified Quartessence Cosmology
J. A. S. Lima, J. V. Cunha, J. S. Alcaniz
We propose a new class of accelerating world models unifying the cosmological dark sector (dark matter and dark energy). All the models are described by a simplified version of the…
Dark Energy and Some Alternatives: a Brief Overview
J. S. Alcaniz
The high-quality cosmological data, which became available in the last decade, have thrusted upon us a rather preposterous composition for the universe which poses one of the great…
Scalar-field-dominated cosmology with a transient accelerating phase
F. C. Carvalho, J. S. Alcaniz, J. A. S. Lima +1
A new cosmological scenario driven by a slow rolling homogeneous scalar field whose exponential potential has a quadratic dependence on the field in addition to the stan…
Age constraints on the cosmic equation of state
M. A. Dantas, J. S. Alcaniz, Deepak Jain +1
Dark energy is the invisible fuel that seems to drive the current acceleration of the Universe. Its presence, which is inferred from an impressive convergence of high-quality obser…
Supernova constraints on decaying vacuum cosmology
S. Carneiro, C. Pigozzo, H. A. Borges +1
There is mounting observational evidence that the expansion of our Universe is undergoing a late-time acceleration. Among many proposals to describe this phenomenon, the cosmologic…