RSS 1.0Departamento de Física e Química
Browse by
Recent Submissions
-
Parity singlets and doublets of massive spin-3 particles in D = 2 + 1 via Noether gauge embedding
Dalmazi, D.
; Mendonça, E. L. ; (European Physical Journal Plus, 2019) [Artigo]
Here we demonstrate that the sixth-order (in derivatives) spin-3 self-dual model can be obtained from the fifth-order self-dual model via a Noether Gauge Embedding (NGE) of longitudinal Weyl transformations η( μ ν∂α )Φ. ... -
Gamified experimental physics classes: A promising active learning methodology for higher education
; Zacharias, Carlos Renato (European Journal of Physics, 2019) [Artigo]
Gamification is defined as the use of game design elements in a non-game context. In higher education, gamification is a methodology intending to motivate students to acquire academical knowledge and soft skills, while ... -
De Sitter and bounce solutions from anisotropy in extended gravity cosmology
; Ribeiro, G.; (Modern Physics Letters A, 2019) [Artigo]
We investigate the consequences of incepting the Bianchi type I metric in the f(R,T) gravity theory field equations. We particularly derive solutions for a matter-dominated universe. From such a scenario, it is possible ... -
Cold Atmospheric Pressure Plasma Jet Reduces Trichophyton rubrum Adherence and Infection Capacity
Borges, Aline Chiodi; Nishime, Thalita Mayumi Castaldelli ; ; ; Kostov, Konstantin Georgiev ; ; ; ; (Mycopathologia, 2019) [Artigo]
This study aimed to evaluate the effects of cold atmospheric pressure plasma (CAPP) jet on Trichophyton rubrum growth, germination and adherence to nail. The effects of plasma jet on T. rubrum conidia germination and on ... -
Galaxy cluster Sunyaev-Zel'dovich effect scaling-relation and type Ia supernova observations as a test for the cosmic distance duality relation
; ; Pereira, S. H.; (Journal of Cosmology and Astroparticle Physics, 2019) [Artigo]
In this paper, we propose a new test to the cosmic distance duality relation (CDDR), DL=DA(1+z)2, where DL and DA are the luminosity and angular diameter distances, respectively. The data used correspond to 61 Type Ia ... -
An Alternative Approach Concerning Elko Spinors and the Hidden Unitarity
Duarte, L. C.; Lima, R. de C. ; ; (Advances in Applied Clifford Algebras, 2019) [Artigo]
In this theoretical communication we look towards understand the underlying phenomenology concerning the Elko spinors within VSR theory. The program to be accomplished here start when we define the eigenspinors of the ... -
Erratum to: Type-4 spinors: transmuting from Elko to single-helicity spinors (The European Physical Journal C, (2019), 79, 4, (308)
; Rogerio, R. J. Bueno; (European Physical Journal C, 2019) [Errata]
The last co-Author’s name in the original manuscript is not correct. -
An unified cosmological evolution driven by a mass dimension one fermionic field
Pereira, S. H.; Alves, M. E.S. ; (European Physical Journal C, 2019) [Artigo]
An unified cosmological model for an Universe filled with a mass dimension one (MDO) fermionic field plus the standard matter fields is considered. After a primordial quantum fluctuation the field slowly rolls down to the ... -
Exact solution for flat scale-invariant cosmology
Jesus, J. F. (Revista Mexicana de Astronomia y Astrofisica, 2019) [Artigo]
An exact solution for the spatially flat scale-invariant cosmology, recently proposed by Maeder (2017a) is deduced. No deviation from the numerical solution was detected. The exact solution yields transparency for the ... -
Proper treatment of scalar and vector exponential potentials in the Klein-Gordon equation: Scattering and bound states
; Castro, Luis B.; de Castro, Antonio S. (European Physical Journal Plus, 2019) [Artigo]
We point out a misleading treatment in the literature regarding bound-state solutions for the s-wave Klein-Gordon equation with exponential scalar and vector potentials. Following the appropriate procedure for an arbitrary ... -
Surface modifications by both anodic oxidation and ion beam implantation on electropolished titanium substrates
Acciari, Heloisa A.; Palma, Dener P.S. ; Codaro, Eduardo N. ; ; ; ; ; (Applied Surface Science, 2019) [Artigo]
The purpose of this work is to investigate the superficial induced characteristics on titanium surface by anodic oxidation and ion beam implantation, i.e. two surface modification technologies, by focusing on variations ... -
Higher order derivative operators as quantum corrections
Borges, L. H.C.; ; ; (Nuclear Physics B, 2019) [Artigo]
In this paper we propose a non-minimal, and ghost free, coupling between the gauge field and the fermionic one from which we obtain, perturbatively, terms with higher order derivatives as quantum corrections to the photon ... -
Comment on Effective of the q-deformed pseudoscalar magnetic field on the charge carriers in graphene [J. Math. Phys. 57, 082105 (2016)]
; ; Castro, Luis B. (Journal of Mathematical Physics, 2019) [Resenha]
We point out a misleading treatment in a recent paper published in this journal [M. Eshgi and H. Mehraban, J. Math. Phys. 57, 082105 (2016)] concerning solutions for the two-dimensional Dirac-Weyl equation with a q-deformed ... -
Field Sources in a CPT-Even Lorentz-Violation Maxwell Electrodynamics
Borges, L. H.C.; (Brazilian Journal of Physics, 2019) [Artigo]
This paper is dedicated to the study of interactions between external sources for the electromagnetic field in a model which exhibits Lorentz-symmetry breaking. We investigate such interactions in the CPT-even photon sector ... -
Partition function for a mass dimension one fermionic field and the dark matter halo of galaxies
Pereira, S. H.; Costa, Richard S. (Modern Physics Letters A, 2019) [Artigo]
This work studies the finite temperature effects of a mass dimension one fermionic field, sometimes called Elko field. The equilibrium partition function was calculated by means of the imaginary time formalism and the ... -
The restricted Inomata-McKinley spinor-plane, homotopic deformations and the Lounesto classification
Beghetto, D.; Rogerio, R. J. Bueno ; (Journal of Mathematical Physics, 2019) [Artigo]
We define a two-dimensional space called the spinor-plane, where all spinors that can be decomposed in terms of Restricted Inomata-McKinley (RIM) spinors reside, and describe some of its properties. Some interesting results ... -
Type-4 spinors: transmuting from Elko to single-helicity spinors
; Rogerio, R. J. Bueno; (European Physical Journal C, 2019) [Artigo]
In this communication we briefly report an unexpected theoretical discovery which emerge from the mapping of Elko mass-dimension-one spinors into single helicity spinors. Such procedure unveils a class of spinor which is ... -
A General Method for Transforming Nonphysical Configurations in BPS States
; De Souza Dutra, A.; ; (Advances in High Energy Physics, 2019) [Artigo]
In this work, we apply the so-called BPS method in order to obtain topological defects for a complex scalar field Lagrangian introduced by Trullinger and Subbaswamy. The BPS approach led us to compute new analytical solutions ... -
Topology of the Magnetic Field and Resistivity of a Compact Torus Generated in a Mirrorless Theta Pinch
Kayama, Milton E.; Michelin, Thiago J. ; (Brazilian Journal of Physics, 2019) [Artigo]
The mapping of the magnetic field and analysis of the plasma resistivity were used to study the change of magnetic field topology during the formation of a reversed field configuration. Using a theta pinch with straight ... -
Note on massless and partially massless spin-2 particles in a curved background via a nonsymmetric tensor
Fortes, H. G.M.; Dalmazi, D. (Physical Review D, 2019) [Artigo]
In the last few years, we have seen an increase interest on gravitational waves due to recent and striking experimental results confirming Einstein's general relativity once more. From the field theory point of view, gravity ...