1.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- D. Bazeia3 profiles287 · h 40
- A. Petrov4 profiles183 · h 30
- J. Nascimento2 profiles163 · h 29
- V. B. Bezerra2 profiles136 · h 35
- R. Menezes2 profiles112 · h 23
- F. A. Brito2 profiles87 · h 23
- L. Losano82 · h 24
- E. R. B. de Mello76 · h 0
- G. Olmo73 · h 47
- A. Saharian65 · h 34
- M. Marques2 profiles61 · h 54
- I. Lobo58 · h 22
- Universidade Federal de Campina GrandeBR277 papers
- Universidade de São PauloBR121 papers
- Universitat de ValènciaES97 papers
- Universidade Federal de PernambucoBR67 papers
- Universidade Federal do Rio Grande do NorteBR64 papers
- Universidade Federal de AlagoasBR52 papers
- Yerevan State UniversityAM51 papers
- Universidade Federal de LavrasBR46 papers
- Universidade Estadual da ParaíbaBR45 papers
- Universidade Federal do Rio de JaneiroBR43 papers
- Universidade Federal do MaranhãoBR41 papers
- Universidade Federal Rural de PernambucoBR41 papers
36 papers · 1 filter
Remarks on some vacuum solutions of scalar-tensor cosmological models
V. B. Bezerra, C. Romero, G. Grebot +2
We present a class of exact vacuum solutions corresponding to de Sitter and warm inflation models in the framework of scalar-tensor cosmologies. We show that in both cases the fiel…
Harmonic maps and isometric embeddings of the spacetime
S. Chervon, F. Dahia, C. Romero
We investigate harmonic maps in the context of isometric embeddings when the target space is Ricci-flat and has codimension one. With the help of the Campbell-Magaard theorem we sh…
Solitons in systems of coupled scalar fields
D. Bazeia, M. J. dos Santos, R. F. Ribeiro
We present a method to obtain soliton solutions to relativistic system of coupled scalar fields. This is done by examining the energy associated to static field configurations. In…
Constraints on Non-Newtonian Gravity from Recent Casimir Force Measurements
V. M. Mostepanenko
Corrections to Newton's gravitational law inspired by extra dimensional physics and by the exchange of light and massless elementary particles between the atoms of two macrobodies…
Massive scalar fields in the early Universe
Uwe Guenther, Alexander Zhuk
We discuss the role of gravitational excitons/radions in different cosmological scenarios. Gravitational excitons are massive moduli fields which describe conformal excitations of…
Confinement from new global defect structures
D. Bazeia, F. A. Brito, W. Freire +1
We investigate confinement from new global defect structures in three spatial dimensions. The global defects arise in models described by a single real scalar field, governed by sp…
Improved tests of extra-dimensional physics and thermal quantum field theory from new Casimir force measurements
R. S. Decca, E. Fischbach, G. L. Klimchitskaya +3
We report new constraints on extra-dimensional models and other physics beyond the Standard Model based on measurements of the Casimir force between two dissimilar metals for separ…
Discrete symmetries, invisible axion and lepton number symmetry in an economic 3-3-1 model
Alex G. Dias, C. A. de S. Pires, P. S. Rodrigues da Silva
We show that Peccei-Quinn and lepton number symmetries can be a natural outcome in a 3-3-1 model with right-handed neutrinos after imposing a Z_11 x Z_2 symmetry. This symmetry is…
Structure of the Isovector Dipole Resonance in Neutron-Rich Nucleus and Direct Decay from Pygmy Resonance
T. N. Leite, N. Teruya
The structure of the isovector dipole resonance in neutron-rich calcium isotope, , has been investigated by implementing a careful treatment of the differences of neutron…
Brane Structure from a Scalar Field in Warped Spacetime
D. Bazeia, C. Furtado, A. R. Gomes
We deal with scalar field coupled to gravity in five dimensions in warped geometry. We investigate models described by potentials that drive the system to support thick brane solut…
On the embedding of branes in five-dimensional spaces
F. Dahia, C. Romero
We investigate the embedding of four-dimensional branes in five-dimensional spaces. We firstly consider the case when the embedding space is a vacuum bulk whose energy-momentum ten…
Spinor Casimir densities for a spherical shell in the global monopole spacetime
A. A. Saharian, E. R. Bezerra de Mello
We investigate the vacuum expectation values of the energy-momentum tensor and the fermionic condensate associated with a massive spinor field obeying the MIT bag boundary conditio…
Global aspects of gravitomagnetism
A. Barros, V. B. Bezerra, C. Romero
We consider global properties of gravitomagnetism by investigating the gravitomagnetic field of a rotating cosmic string. We show that although the gravitomagnetic field produced b…
Five-Dimensional QED, Muon Pair Production and Correction to the Coulomb Potential
J. R. Nascimento, C. A de S. Pires, R. F. Ribeiro
We consider QED in five dimensions in a configuration where matter is localized on a 3-brane while foton propagates in the bulk. The idea is to investigate the effects of the Kaluz…
Loop variables in the geometry of a rotating black string
A. M. de M. Carvalho, Fernando Moraes, Claudio Furtado
In this paper we analyze in the Wilson loop context the parallel transport of vectors and spinors around a closed loop in the background space-time of a rotating black string in or…
Quantum Dynamics of Magnetic and Electric Dipoles and Berry's Phase
Claudio Furtado, C. A. de Lima Ribeiro
We study the quantum dynamics of neutral particle that posseses a permanent magnetic and electric dipole moments in the presence of an electromagnetic field. The analysis of this d…
Solid State Analog for He-McKellar-Wilkens Quantum Phase
C. A. de Lima Ribeiro, Claudio Furtado, Fernando Moraes
In this letter we investigate the quantum dynamics of a quasiparticle in the presence of a charged screw dislocation submitted to a uniform magnetic field. Analysing the quantum sc…
Gravitational field around a time-like current-carrying screwed cosmic string in scalar-tensor theories
V. B. Bezerra, C. N. Ferreira, J. B. Fonseca-Neto +1
In this paper we obtain the space-time generated by a time-like current-carrying superconducting screwed cosmic string(TCSCS). This gravitational field is obtained in a modified sc…
Supergravity brane worlds and tachyon potentials
D. Bazeia, F. A. Brito, J. R. Nascimento
We study massless and massive graviton modes that bind on thick branes which are supergravity domain walls solutions in -dimensional supergravity theories where only the supergr…
Issues of duality on non-commutative manifolds: the {\it non-equivalence} between self-dual and topologically massive models
T. Mariz, R. Menezes, J. R. S. Nascimento +2
We study issues of duality and dual equivalence in non-commutative manifolds. In particular the question of dual equivalence for the actions of the non-commutative extensions of th…
Vacuum Polarization of a Charged Massless Fermionic Field by a Magnetic Flux in the Cosmic String Spacetime
J. Spinelly, E. R. Bezerra de Mello
We calculate the vacuum averages of the energy-momentum tensor associated with a massless left-handed spinor fields due to magnetic fluxes on idealized cosmic string spacetime. In…
On the dual equivalence of the self-dual and topologically massive p-form models
R. Menezes, J. R. S. Nascimento, R. F. Ribeiro +1
We study the duality symmetry in p-form models containing a generalized term in spacetime manifolds of arbitrary dimensions. The equivalence between the $B_q\we…
Vacuum Polarization by a Magnetic Flux in a Cosmic String Background
J. Spinelly, E. R. Bezerra de Mello
In this paper we analyse the vacuum polarization effects due to a magnetic flux on massless fermionic fields in a cosmic string background. Three distinct configurations of magneti…
New Global Defect Structures
D. Bazeia, J. Menezes, R. Menezes
We investigate the presence of defects in systems described by real scalar field in (D,1) spacetime dimensions. We show that when the potential assumes specific form, there are mod…