16 citations · 62 across the 13 of their papers we have counts for
14 papers
Alternative Hamiltonian and Lagrangian Approaches for Constrained Systems
M. A. de Andrade, C. Neves, E. V. Corrêa Silva
While standard Hamiltonian and Lagrangian methods are powerful for unconstrained classical systems, they are not directly suited to constrained ones, despite the existence of well-…
Massive Dirac neutrinos from an alternative extension of the Standard Model
M. A. De Andrade, C. Neves, E. V. Corrêa Silva
An alternative approach for deriving neutrino masses from the known masses of quarks, charged leptons, and the parameters of the Pontecorvo--Maki--Nakagawa--Sakata (PMNS) matrix is…
Barcelos-Wotzasek symplectic algorithm for constrained systems revisited
M. A. de Andrade, C. Neves, E. V. Corrêa Silva
A minor change in the Barcelos-Wotzasek (BW) symplectic algorithm for constrained systems is proposed. The change addresses some criticism that formalism has received, placing it o…
Noncommutative Derivation of the Planck's Radiation Law
M. A. De Andrade, L. G. Ferreira Filho, C. Neves
The Planck's radiation law for the blackbody radiation spectrum was capable to explain the experimentally-measured blackbody spectrum. In order to get this result, Planck proposed…
Noncommutative approach to disclose a Higgs group
M. A. De Andrade, C. Neves
A noncommutative(NC) version for a global scalar field theory is proposed and an alternative investigation about how noncommutative drives spontaneous symmetry breaking (SSB…
Noncommutative approach to diagnose degenerate Higgs bosons at 125 GeV
M. A. De Andrade, C. Neves
We propose a noncommutative (NC) version for a global O(2) scalar field theory, whose damping feature is introduced into the scalar field theory through the NC parameter. In this c…
An alternative way to explain how non-commutativity arises in the bosonic string theory
M. A. De Andrade, C. Neves
In this work we will investigate how the non-commutativity arises into the string theory, \textit{i.e.}, how the bosonic string theory attaches to a D3-brane in the presence of mag…
Noncommutative Mapping from the symplectic formalism
M. A. De Andrade, C. Neves
The Bopp's shifts will be generalized through symplectic formalism. A special procedure, like a "diagonalization", which drives the completely deformed symplectic matrix to the sta…
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…
A canonical transformation and the tunneling probability for the birth of an asymptotically DeSitter universe with dust
E. V. Corrêa Silva, G. A. Monerat, G. Oliveira-Neto +2
In the present work, we study the quantum cosmology description of closed Friedmann-Robertson-Walker models in the presence of a positive cosmological constant and a generic perfec…