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pro vyhledávání: '"Rodrigues, Denis"'
Autor:
Pereira, Carlos F. S., Rodrigues, Denis C., Silva, Marcos V. de S., Fabris, Júlio C., Rodrigues, Manuel E., Belich, H.
In the present work, we obtain and analyze a new class of analytical solutions of magnetically charged black bounces in k-essence theory, spherically symmetric in (3+1)-dimensions, coupled to nonlinear electrodynamics (NED). We consider two metric mo
Externí odkaz:
http://arxiv.org/abs/2409.09182
Autor:
Pereira, Carlos F. S., Martins, Ébano L., Rodrigues, Denis C., Fabris, Júlio C., Rodrigues, Manuel E.
In the present study, we generalize the possible ghost field configurations within the framework of $k$-essence theory to the Simpson-Visser metric area function $\Sigma^2=x^2+a^2$. Our analysis encompasses field configurations for the region-defined
Externí odkaz:
http://arxiv.org/abs/2405.07455
Autor:
Rodrigues, Denis Robson
A finalidade dessa pesquisa foi pensar no contexto complexo de conflitos em torno da conservação dos sócios-ecossistemas da Terra a função estratégica que vem ocupando por milênios o modo de ser indígena na reprodução e conservação das fl
In the present work, we construct black-bounce configurations in the context of $k$-essence theory. The solutions have a regular metric function at the origin. The area metric function is linked to the black-bounce area initially considered by Simpso
Externí odkaz:
http://arxiv.org/abs/2309.10963
Autor:
Rodrigues, Denis Alves
A administração pública brasileira tem uma imagem muito negativa perante a sociedade, o que se deve, em grande medida, a um histórico de ineficiência e práticas patrimonialistas e clientelistas. Para enfrentar o desafio de mudar esse tipo de ad
We classified and studied the charged black hole and wormhole solutions in the Einstein--Maxwell system in the presence of a massless, real scalar field. The possible existence of charged black holes in general scalar--tensor theories was studied in
Externí odkaz:
http://arxiv.org/abs/2203.01278
Quantum gravity is effective in domains where both quantum effects and gravity are essential, such as in the vicinity of space-time singularities. This paper will investigate the quantization of a black-hole gravity, particularly the region surroundi
Externí odkaz:
http://arxiv.org/abs/2111.13575
Autor:
Bronnikov, K. A., Fabris, Júlio C., Piattella, Oliver F., Rodrigues, Denis C., Santos, Edison C. O.
We study the stability of static, spherically symmetric solutions of Rastall's theory in the presence of a scalar field with respect to spherically symmetric perturbations. It is shown that the stability analysis is inconsistent in the sense that lin
Externí odkaz:
http://arxiv.org/abs/2007.01945
Publikováno v:
Int. J. Mod. Phys. D 2050016 (2020)
We study the stability properties of static, spherically symmetric configurations in k-essence theories with the Lagrangians of the form $F(X)$, $X \equiv \phi_{,\alpha} \phi^{,\alpha}$. The instability under spherically symmetric perturbations is pr
Externí odkaz:
http://arxiv.org/abs/1908.09126
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