6 citations · 25 across the 11 of their papers we have counts for
12 papers
Charged Letelier--Alencar Black Strings with a Quintessence and the Cosmolgical Constant
B. Eslam Panah, F. M. da Silva, L. G. Barbosa
This study derives charged black string solutions in the presence of a Letelier--Alencar cloud of strings and quintessence within Einstein--Maxwell-- theory. We study the curvat…
Regular fluid of strings black hole with non trivial core and asymptotic structure by gravitational decoupling
Milko Estrada, Luis C. N. Santos, Leonardo G. Barbosa
Cloud-of-strings (CS) geometries provide an effective description of one-dimensional string distributions. However, their central singularity cannot be removed through the standard…
Chiral symmetry and curvature bounds in de Sitter spacetime
L. G. Barbosa
We study chiral symmetry breaking in the Nambu-Jona-Lasinio model on a de Sitter background, treating it as a non-renormalizable effective field theory with a physical ultraviolet…
Charged black string immersed in a quintessence fluid and string cloud
Leonardo G. Barbosa, Franciele M. da Silva
We present a new static solution describing a charged black string immersed in a Kiselev-type quintessence fluid and a string cloud. The metric and field equations are solved for a…
Vacuum polarization in the Schwarzschild black hole with a global monopole
Leonardo G. Barbosa, Victor H. M. Ramos, João Paulo M. Pitelli
We investigate vacuum polarization on the event horizon of a Schwarzschild black hole carrying a global monopole. For a massless scalar field in the Hartle-Hawking state and wi…
Charged scalar boson in Melvin universe
L. G. Barbosa, L. C. N. Santos, J. V. Zamperlini +2
This work investigates the dynamics of a charged scalar boson in the Melvin universe by solving the Klein-Gordon equation with minimal coupling in both inertial and non-inertial fr…
Kiselev black strings: the charged rotating solutions
Leonardo G. Barbosa, Victor Hugo M. Ramos, Luis Cesar N. dos Santos +1
We investigate the properties of a charged rotating black string immersed in a Kiselev anisotropic fluid in anti-de Sitter (AdS) spacetime. The Einstein-Maxwell equations with an a…
Cornell and Coulomb potentials in the double defect spacetime
L. G. Barbosa, L. C. N. Santos, J. V. Zamperlini +1
We analyze the quantum dynamics of a scalar field in a spacetime incorporating dual topological defects, specifically a cosmic string and a global monopole. Utilizing a generalized…
Bound and Scattering States in a Spacetime with Dual Topological Defects: Cosmic String and Global Monopole
L. G. Barbosa, L. C. N. Santos, J. V. Zamperlini +1
This paper explores the relativistic quantum motion of scalar bosons in the presence of mixed topological defects: cosmic strings and global monopoles. The Klein-Gordon equation wi…
Black Strings and String Clouds Embedded in Anisotropic Quintessence: Solutions for Scalar Particles and Implications
Maria de Lourdes Deglmann, Leonardo G. Barbosa, Celso de Camargo Barros
We analyze the spacetime metric associated with a black string surrounded by a cloud of strings and an anisotropic fluid of quintessence in cylindrically symmetric AdS spacetime. W…
Klein-Gordon oscillator subject to a Coulomb-type potential in Bonnor-Melvin universe with a cosmological constant
L. G. Barbosa, C. C. Barros
In this work we study spin-0 particles described by the Klein-Gordon oscillator formalism in a spacetime which structure is determined by a homogeneous magnetic field and a cosmolo…
Scalar bosons in Bonnor-Melvin- universe: Exact solution, Landau levels and Coulomb-like potential
L. G. Barbosa, C. C. Barros
In this work, we study spin-0 particles in a spacetime whose structure is determined by a homogeneous magnetic field and a cosmological constant. For this purpose, we take into acc…