186 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade Federal do ParanáBR20 papers
- Universidade Tecnológica Federal do ParanáBR15 papers
- Universidade Federal do Espírito SantoBR13 papers
- Universidade Estadual de LondrinaBR12 papers
- Instituto Nacional de Pesquisas EspaciaisBR7 papers
- Universidade de São PauloBR7 papers
- Shahid Beheshti UniversityIR6 papers
- Universidade de BrasíliaBR6 papers
- Universidade Federal do Rio Grande do SulBR5 papers
- Universitat de BarcelonaES5 papers
- Fundação Parque Tecnológico ItaipuBR4 papers
- Universidade Federal de Campina GrandeBR4 papers
22 papers · 1 filter
Probing dynamical embeddings in a five-dimensional spacetime in light of DESI BAO
Abraão J. S. Capistrano, Emanuelly Silva, Rafael C. Nunes +1
We here investigate the observational viability of Nash gravity as an alternative to the standard CDM cosmology. Based on Nash's embedding theorem, the model introduces orthogon…
Lower tensor-to-scalar ratio as possible signature of modified gravity
Abraão J. S. Capistrano, Rafael C. Nunes, Luís A. Cabral
This paper simplifies the induced four-dimensional gravitational equations originating from a five-dimensional bulk within the framework of Nash's embeddings, incorporating them in…
Orbital decay of double white dwarfs: beyond gravitational wave radiation effects
G. A. Carvalho, R. C. dos Anjos, J. G. Coelho +6
The traditional description of the orbital evolution of compact-object binaries, like double white dwarfs (DWDs), assumes that the system is driven only by gravitational wave (GW)…
Acceleration of charged particles from near-extremal rotating black holes embedded in magnetic fields
C. H. Coimbra-Araújo, R. C. Anjos
The aim of the present article is to evaluate the motion of charged test particles in the vicinity of a near-extremal rotating black hole in the presence of magnetic fields. Euler-…
Bohmian mechanics of Klein-Gordon equation via quantum metric and mass
S. Jalalzadeh, A. J. S. Capistrano
The causal stochastic interpretation of relativistic quantum mechanics has the problems of superluminal velocities, motion backward in time and the incorrect non-relativistic limit…
Interacting Dark Side of Universe Through Generalized Uncertainty Principle
Mahdi Rashki, Majid Fathi, Behrang Mostaghel +1
We investigate the impact of the generalized uncertainty principle proposed by some approaches to quantum gravity such as string theory and doubly special relativity on the cosmolo…
Quantum deformation of quantum cosmology: A framework to discuss the cosmological constant problem
S. Jalalzadeh, A. J. S. Capistrano, P. V. Moniz
We endorse the context that the cosmological constant problem is a quantum cosmology issue. Therefore, in this paper we investigate the -deformed Wheeler-DeWitt equation of a sp…
Quantum Hamilton-Jacobi cosmology and classical-quantum correlation
M. Fathi, S. Jalalzadeh
How the time evolution which is typical for classical cosmology emerges from quantum cosmology? The answer is not trivial because the Wheeler-DeWitt equation is time independent. A…
The Quantum State Of The Universe From Deformation Quantization and Classical-Quantum Correlation
M. Rashki, S. Jalalzadeh
In this paper we study the quantum cosmology of homogeneous and isotropic cosmology, via the Weyl-Wigner-Groenewold-Moyal formalism of phase space quantization, with perfect fluid…
On Quasinormal Modes for Scalar Perturbations of Static Spherically Symmetric Black Holes in Nash Embedding Framework
S. C. Ulhoa, R. G. G. Amorim, Abraão J. S. Capistrano
In this paper we investigate scalar perturbations of black holes embedded in a five dimensional bulk space. It is calculated the quasinormal frequencies of a such black holes using…
Effective perihelion advance and potentials in a conformastatic background with magnetic field
Abraão J. S. Capistrano, Antonio C. Gutiérrez-Piñeres
An Exact solution of the Einstein-Maxwell field equations for a conformastatic metric with magnetized sources is study. In this context, effective potential are studied in order to…
Non-singular Brans-Dicke collapse in deformed phase space
S. M. M. Rasouli, A. H. Ziaie, S. Jalalzadeh +1
We study the collapse process of a homogeneous perfect fluid (in FLRW background) with a barotropic equation of state in Brans-Dicke (BD) theory in the presence of phase space defo…
Anomalous precession of planets on a Weyl conformastatic solution
Abraão J. S. Capistrano, Joice A. M. Penagos, Manuel S. Alárcon
In this paper, we investigate the anomalous planets precession in the nearly-newtonian gravitational regime. This limit is obtained from the application of the slow motion conditio…
Test particles in a magnetized conformastatic spacetime
Antonio C. Gutiérrez-Piñeres, Abraão J. S. Capistrano, Hernando Quevedo
A class of exact conformastatic solutions of the Einstein-Maxwell field equations is presented in which the gravitational and electromagnetic potentials are completely determined b…
Implications on the cosmic coincidence by a dynamical extrinsic curvature
A. J. S Capistrano, L. A. Cabral
In this work, we apply the smooth deformation concept in order to obtain a modification of Friedmann equations. It is shown that the cosmic coincidence can be at least alleviated u…
Why the measured cosmological constant is small
T. Rostami, S. Jalalzadeh
In a quest to explain the small value of the today's cosmological constant, following the approach introduced in [1], we show that the theoretical value of cosmological constant is…
Quantum cosmological intertwining: Factor ordering and boundary conditions from hidden symmetries
T. Rostami, S. Jalalzadeh, P. V. Moniz
We explore the implications of hidden symmetries present in a particular quantum cosmological setting, extending the results reported in \cite{10,11}. In more detail, our case stud…
On the thermal stability of a static spherically symmetric black holes in Nash embedding framework
Abraão J. S Capistrano, Antonio C. Gutiérrez-Piñeres, Sergio C. Ulhoa +1
We study the deformation caused by the influence of extrinsic curvature on a vacuum spherically symmetric metric embedded in a five-dimensional bulk. In this sense, we investigate…
Evolving extrinsic curvature and the cosmological constant problem
Abraao J. S. Capistrano, Luiz A. Cabral
The concept of smooth deformation of Riemannian manifolds associated with the extrinsic curvature is explained and applied to the FLRW cosmology. We show that such deformation can…
Smooth deformations and cosmic statefinders
A. J. S Capistrano
We study the possibility that the universe is subjected to a deformation, besides its expansion described by Friedmann's equations. The concept of smooth deformation of a riemannia…
Weyl conformastatic perihelion advance of small body objects
Abraao J. S. Capistrano, Waldir L. Roque, Rafael S. Valada
In this paper, we examine a static gravitational field with axial symmetry over probe particles in the solar system. Using the Weyl conformastatic solution as a model, we find a no…
Geometrical aspects on the dark matter problem
A. J. S Capistrano, L. A. Cabral
In the present paper we apply the Nash's theory of perturbative geometry to the study of dark matter gravity in a higher-dimensional space-time. It is shown that the dark matter gr…