J
Júlio C. Fabris
Researcher at Universidade Federal do Espírito Santo
Publications - 357
Citations - 7363
Júlio C. Fabris is an academic researcher from Universidade Federal do Espírito Santo. The author has contributed to research in topics: Scalar field & Dark energy. The author has an hindex of 45, co-authored 343 publications receiving 6744 citations. Previous affiliations of Júlio C. Fabris include Institut d'Astrophysique de Paris & Pedagogical University.
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Regular Phantom Black Holes
TL;DR: It looks possible that the Universe has originated in a phantom-dominated collapse in another universe, with KS expansion and isotropization after crossing the horizon, and possible generalizations include k-essence type scalar fields (with a potential) and scalar-tensor gravity.
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Density perturbations in an Universe dominated by the Chaplygin gas
TL;DR: In this paper, the fate of density perturbations in an Universe dominated by the Chaplygin gas was studied and it was shown that it is possible to obtain the value for the density contrast observed in large scale structure of the Universe by fixing a free parameter in the equation of state of this gas.
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Letter: Density Perturbations in a Universe Dominated by the Chaplygin Gas
TL;DR: In this paper, the authors studied the fate of density perturbations in a universe dominated by the Chaplygin gas, which exhibits negative pressure and showed that there is no instability in the small wavelength limit, due to the fact that the sound velocity for the Chapleygin gas is positive.
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Bulk viscous cosmology.
TL;DR: A scenario in which the dark components of the Universe are manifestations of a single bulk viscous fluid, which is competitive in comparison with the currently most popular proposals for the description of the cosmological dark sector.
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Quantum cosmological perfect fluid models
TL;DR: In this paper, perfect fluid Friedmann-Robertson-Walker quantum cosmological models for an arbitrary barotropic equation of state p = αρ were constructed using Schutz's variational formalism.