248 citations · 1k across the 45 of their papers we have counts for
45 papers
Quantum Cosmology with many fluids and the choice of cosmological time
G. A. Monerat, C. G. M. Santos, F. G. Alvarenga +4
In this work we propose the quantization of a cosmological model describing the primordial universe filled with five barotropic fluids, namely: radiation, dust, vacuum, cosmic stri…
Dynamics of a perfect fluid through velocity potentials with aplication in quantum cosmology
F. G. Alvarenga, R. Fracalossi, R. G. Furtado +1
We review the Eulerian description of hidrodynamics using Seliger-Whitham's formalism (in classical case) and Schutz's formalism (in relativistic case). In these formalisms, the ve…
Classical and quantum cosmology with two perfect fluids: stiff matter and radiation
F. G. Alvarenga, R. Fracalossi, R. C. Freitas +1
In this work the homogeneous and isotropic Universe of Friedmann-Robertson-Walker is studied in the presence of two fluids: stiff matter and radiation described by the Schutz's for…
The Kantowski-Sachs quantum model with stiff matter fluid
F. G. Alvarenga, R. Fracalossi, R. C. Freitas +1
In this paper we study the quantum cosmological Kantowski-Sachs model and solve the Wheeler-DeWitt equation in minisuperspace to obtain the wave function of the corresponding unive…
Newtonian Approach to the Matter Power Spectrum of the Generalized Chaplygin Gas
J. C. Fabris, S. V. B. Goncalves, H. E. S. Velten +1
We model the cosmic medium as the mixture of a generalized Chaplygin gas and a pressureless matter component. Within a neo-Newtonian approach we compute the matter power spectrum.…
Matter Power Spectrum for the Generalized Chaplygin Gas Model: The Newtonian Approach
J. C. Fabris, S. V. B. Goncalves, H. E. S. Velten +1
We model the cosmic medium as the mixture of a generalized Chaplygin gas and a pressureless matter component. Within a neo-Newtonian approach (in which, different from standard New…