99 citations · 617 across the 23 of their papers we have counts for
24 papers
Gravitational decoupling and regular hairy black holes: Geodesic stability, quasinormal modes, and thermodynamic properties
R. C. de Paiva, K. S. Alves, R. T. Cavalcanti +1
The stability of geodesic orbits around a regular hairy black hole, in the gravitational decoupling setup, is investigated by employing Lyapunov exponents, which quantify the diver…
A unified approach to spinor duals via Clifford algebras and groups
R. T. Cavalcanti, J. M. Hoff da Silva
Recent developments in the construction of generalized Dirac duals have revealed, within the structure of the Clifford algebra the existen…
A note on hidden classes in spinor classification
R. J. Bueno Rogerio, R. T. Cavalcanti, C. H. Coronado Villalobos +1
The Lounesto classification is a well-established scheme for categorizing spinors based on their physical content, which are determined by their associated bilinear forms. It consi…
Revisiting Takahashi's inversion theorem in discrete symmetry-based dual frameworks
R. J. Bueno Rogerio, R. T. Cavalcanti, J. M. Hoff da Silva +1
The so-called Takahashi's \emph{Inversion Theorem}, the reconstruction of a given spinor based on its bilinear covariants, are re-examined, considering alternative dual structures.…
Quantum Hairy Black Hole Formation and Horizon Quantum Mechanics
R. T. Cavalcanti, J. M. Hoff da Silva
After introducing the gravitational decoupling method and the hairy black hole recently derived from it, we investigate the formation of quantum hairy black holes by applying the h…
A geometrical approach to nontrivial topology via exotic spinors
J. M. Hoff da Silva, R. T. Cavalcanti, D. Beghetto +1
Exotic spinors arise in non-simply connected base manifolds due to the nonequivalent spinor structure. The dynamics of exotic spinors are endowed with an additional differential fa…
Near horizon thermodynamics of hairy black holes from gravitational decoupling
Rogerio T. Cavalcanti, Kelvin dos S. Alves, Julio M. Hoff da Silva
The horizon structure and thermodynamics of hairy spherically symmetric black holes generated by the gravitational decoupling method are carefully investigated. The temperature and…
Echoes of the gravitational decoupling: scalar perturbations and quasinormal modes of hairy black holes
R. T. Cavalcanti, R. C. de Paiva, R. da Rocha
The behavior of hairy black hole solutions, obtained by the gravitational decoupling (GD) method, is investigated under scalar perturbations. The quasinormal mode frequencies of su…
Exotic fermionic fields and minimal length
J. M. Hoff da Silva, D. Beghetto, R. T. Cavalcanti +1
We investigate the effective Dirac equation, corrected by merging two scenarios that are expected to emerge towards the quantum gravity scale. Namely, the existence of a minimal le…
Unveiling Mapping Structures of Spinor Duals
R. T. Cavalcanti, J. M. Hoff da Silva
Following the program of investigation of alternative spinor duals potentially applicable to fermions beyond the standard model, we demonstrate explicitly the existence of several…
Spinor symmetries and underlying properties
J. M. Hoff da Silva, R. T. Cavalcanti, D. Beghetto +1
By exploring a spinor space whose elements carry a spin 1/2 representation of the Lorentz group and satisfy the the Fierz-Pauli-Kofink identities we show that certain symmetries op…
Further investigation of mass dimension one fermionic duals
J. M. Hoff da Silvaa, R. T. Cavalcanti
In this paper we proceed into the next step of formalization of a consistent dual theory for mass dimension one spinors. This task is developed approaching the two different and co…
Aspects of Black Hole Physics Beyond General Relativity: extra dimensions, horizon wave function and applications
Rogerio Teixeira Cavalcanti
This work is devoted to investigate some consequences of black holes physics beyond the domain of general relativity, mainly in effective extra dimensional models. The investigatio…
Exotic Spinorial Structure and Black Holes in General Relativity
Dino Beghetto, Rogerio T. Cavalcanti, Julio M. Hoff da Silva
We explore different (and complementary) views of spinors and their exotic counterparts, linking the very existence of the later to the presence of black holes. Moreover, we invest…
Revealing how different spinors can be: the Lounesto spinor classification
J. M. Hoff da Silva, R. T. Cavalcanti
This paper aims to give a coordinate based introduction to the so-called Lounesto spinorial classification scheme. We introduce the main ideas and aspects of this spinorial categor…
Strong Deflection Limit Lensing Effects in the Minimal Geometric Deformation and Casadio-Fabbri-Mazzacurati Solutions
R. T. Cavalcanti, A. Goncalves da Silva, Roldao da Rocha
In this paper we apply the strong deflection limit approach to investigate the gravitational lensing phenomena beyond general relativity. This is accomplished by considering the le…
Flag-dipole and flagpole spinors fluid flows in Kerr spacetimes
Roldao da Rocha, R. T. Cavalcanti
Flagpole and flag-dipole spinors are particular classes of spinor fields that has been recently used in different branches of theoretical physics. In this paper, we study the possi…
Fluid/gravity correspondence and the CFM black brane solutions
Roberto Casadio, Rogerio T. Cavalcanti, Roldao da Rocha
We consider the lower bound for the shear viscosity-to-entropy density ratio, obtained from the fluid/gravity correspondence, in order to constrain the post-Newtonian parameter of…
Horizon of quantum black holes in various dimensions
Roberto Casadio, Rogerio T. Cavalcanti, Andrea Giugno +1
We adapt the horizon wave-function formalism to describe massive static spherically symmetric sources in a general -dimensional space-time, for and including the …
Dark Spinors Hawking Radiation in String Theory Black Holes
R. T. Cavalcanti, Roldao da Rocha
The Hawking radiation spectrum of Kerr-Sen axion-dilaton black holes is derived, in the context of dark spinors tunnelling across the horizon. Since a black hole has a well defined…
Spherically Symmetric Thick Branes Cosmological Evolution
Alex E. Bernardini, R. T. Cavalcanti, Roldao da Rocha
Spherically symmetric time-dependent solutions for the 5D system of a scalar field canonically coupled to gravity are obtained and identified as an extension of recent results obta…
Classification of Singular Spinor Fields and Other Mass Dimension One Fermions
R. T. Cavalcanti
We investigate the constraint equations of the Lounesto spinor fields classification and show that it can be used to completely characterize all the singular classes, which are pot…
VSR symmetries in the DKP algebra: the interplay between Dirac and Elko spinor fields
R. T. Cavalcanti, J. M. Hoff da Silva, Roldao da Rocha
VSR symmetries are here naturally incorporated in the DKP algebra on the spin-0 and the spin-1 DKP sectors. We show that the Elko (dark) spinor fields structure plays an essential…
Flag-Dipole Spinor Fields in ESK Gravities
Roldao da Rocha, Luca Fabbri, J. M. Hoff da Silva +2
We consider the Riemann-Cartan geometry as a basis for the Einstein-Sciama-Kibble theory coupled to spinor fields: we focus on and conformal gravities, regarding the flag-di…