26 citations · 76 across the 18 of their papers we have counts for
10 papers · 1 filter
Quantum Tunneling and the Emergence of Classical Spacetime in Einstein-Æther Quantum Cosmology
Germano A. Monerat, Alessandro O. Castro Junior, Eduardo V. Corrêa Silva +1
We investigate a quantum cosmological model within the framework of Einstein-Æther gravity. The model consists of a positively curved FLRW Universe whose matter content is describe…
Primordial Universe with radiation and Bose-Einstein condensate
F. G. Alvarenga, L. G. Ferreira Filho, R. Fracalossi +5
In this work we derive a scenario {in which} the early universe consists of {radiation fluid} and Bose-Einstein condensate. The possibility of gravitational self-interaction due to…
Noncommutativity in the early Universe
G. Oliveira-Neto, M. Silva de Oliveira, G. A. Monerat +1
In the present work, we study the noncommutative version of a quantum cosmology model. The model has a Friedmann-Robertson-Walker geometry, the matter content is a radiative perfec…
Quantum noncomutativity in quantum cosmology
G. Oliveira-Neto, G. A. Monerat, E. V. Corrêa Silva +2
In the present work, we study the noncommutative version of a quantum cosmology model. The model has a Friedmann-Robertson-Walker geometry, the matter content is a radiative perfec…
Can noncommutativity affect the whole history of the Universe?
G. A. Monerat, E. V. Corrêa Silva, C. Neves +3
We study a classical, noncommutative (NC), Friedmann-Robertson-Walker cosmological model. The spatial sections may have positive, negative or zero constant curvatures. The matter c…
An Early Universe Model with Stiff Matter and a Cosmological Constant
G. Oliveira-Neto, G. A. Monerat, E. V. Corrêa Silva +2
In the present work, we study the quantum cosmology description of a Friedmann-Robertson-Walker model in the presence of a stiff matter perfect fluid and a negative cosmological co…
Canonical transformation for stiff matter models in quantum cosmology
C. Neves, G. A. Monerat, G. Oliveira-Neto +2
In the present work we consider Friedmann-Robertson-Walker models in the presence of a stiff matter perfect fluid and a cosmological constant. We write the superhamiltonian of thes…
The Planck era with a negative cosmological constant and cosmic strings
G. A. Monerat, L. G. Ferreira Filho, G. Oliveira-Neto +2
In the present letter, we consider the DeBroglie-Bohm interpretation of quantum Friedmann-Robertson-Walker models in the presence of a negative cosmological constant and cosmic str…
Probing singularities in quantum cosmology with curvature scalars
G. Oliveira Neto, E. V. Correa Silva, N. A. Lemos +1
We provide further evidence that the canonical quantization of cosmological models eliminates the classical Big Bang singularity, using the {\it DeBroglie-Bohm} interpretation of q…
Tunneling probability for the birth of an asymptotically DeSitter universe
J. Acacio de Barros, E. V. Corrêa Silva, G. A. Monerat +3
In the present work, we quantize a closed Friedmann-Robertson-Walker model in the presence of a positive cosmological constant and radiation. It gives rise to a Wheeler-DeWitt equa…