O
Oliver F. Piattella
Researcher at Universidade Federal do Espírito Santo
Publications - 137
Citations - 2502
Oliver F. Piattella is an academic researcher from Universidade Federal do Espírito Santo. The author has contributed to research in topics: Scalar field & Dark matter. The author has an hindex of 27, co-authored 130 publications receiving 2199 citations. Previous affiliations of Oliver F. Piattella include Heidelberg University & National Council for Scientific and Technological Development.
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RECONSTRUCTING f(R, T) GRAVITY FROM HOLOGRAPHIC DARK ENERGY
TL;DR: In this article, the authors consider cosmological scenarios based on f(R, T) theories of gravity (R is the Ricci scalar and T is the trace of the energy-momentum tensor).
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Rastall Cosmology and the ΛCDM Model
Carlos E. M. Batista,Mahamadou H. Daouda,Júlio C. Fabris,Oliver F. Piattella,Davi C. Rodrigues +4 more
TL;DR: In this article, a two-fluid model is introduced, one component representing vacuum energy whereas the other pressureless matter (e.g. baryons plus cold dark matter), and the cosmological scenario is the same as for the Lambda CDM model, both at background and linear perturbative levels.
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Gauge-invariant analysis of perturbations in Chaplygin gas unified models of dark matter and dark energy
Vittorio Gorini,Alexander Yu. Kamenshchik,Ugo Moschella,Oliver F. Piattella,Alexei A. Starobinsky,Alexei A. Starobinsky +5 more
TL;DR: In this paper, the generalized Chaplygin gas model was used to analyze the perturbative behavior of two cosmological models based on the generalized Chuggin gas describing both dark matter and dark energy in the present universe.
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Note on the evolution of the gravitational potential in Rastall scalar field theories
TL;DR: In this paper, the evolution of the gravitational potential in Rastall scalar field theories is investigated, and it is shown that in a single component model a consistent perturbation theory, formulated in the Newtonian gauge, is possible only for γ = 1, which is the General Relativity limit.
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Bulk viscous cosmology with causal transport theory
TL;DR: In this paper, the authors consider cosmological scenarios originating from a single imperfect fluid with bulk viscosity and apply Eckart's and both the full and the truncated M?ller-Israel-Stewart's theories as descriptions of the non-equilibrium processes.