Zobrazeno 1 - 10
of 3 517
pro vyhledávání: '"Carlos, A R"'
Autor:
de Paula, Marco A. A., Junior, Haroldo C. D. Lima, Cunha, Pedro V. P., Herdeiro, Carlos A. R., Crispino, Luís C. B.
In relativistic mechanics, the 4-velocity and the 4-momentum need not be parallel. This allows their norm to have a different sign. This possibility occurs in nonlinear electrodynamics (NED) models minimally coupled to Einstein's theory. Surprisingly
Externí odkaz:
http://arxiv.org/abs/2412.18659
We study stationary clouds of a gauged, complex scalar field on a magnetically (and possibly electrically as well) charged Kerr-Newman black hole (BH). The existence of a magnetic charge $Q_m$ promotes a north-south $\textit{asymmetry}$ of the scalar
Externí odkaz:
http://arxiv.org/abs/2410.21421
Hyperparameter Optimisation in Deep Learning from Ensemble Methods: Applications to Proton Structure
Autor:
Cruz-Martinez, Juan, Jansen, Aaron, van Oord, Gijs, Rabemananjara, Tanjona R., Rocha, Carlos M. R., Rojo, Juan, Stegeman, Roy
Deep learning models are defined in terms of a large number of hyperparameters, such as network architectures and optimiser settings. These hyperparameters must be determined separately from the model parameters such as network weights, and are often
Externí odkaz:
http://arxiv.org/abs/2410.16248
Autor:
Afshordi, Niayesh, Ashtekar, Abhay, Barausse, Enrico, Berti, Emanuele, Brito, Richard, Buoninfante, Luca, Carballo-Rubio, Raúl, Cardoso, Vitor, Carullo, Gregorio, Dafermos, Mihalis, De Laurentis, Mariafelicia, del Rio, Adrian, Di Filippo, Francesco, Eichhorn, Astrid, Emparan, Roberto, Gregory, Ruth, Herdeiro, Carlos A. R., Kunz, Jutta, Lehner, Luis, Liberati, Stefano, Mathur, Samir D., Nissanke, Samaya, Pani, Paolo, Platania, Alessia, Pretorius, Frans, Sasaki, Misao, Tiede, Paul, Unruh, William, Visser, Matt, Wald, Robert M.
The gravitational physics landscape is evolving rapidly, driven by our ability to study strong-field regions, in particular black holes. Black Holes Inside and Out gathered world experts to discuss the status of the field and prospects ahead. We hope
Externí odkaz:
http://arxiv.org/abs/2410.14414
Autor:
Herdeiro, Carlos A. R.
Recently, a scalar counterpart of the Schwarzschild-Melvin Universe was reported [arXiv:2410.02851]. We show this solution is a special case of a Schwarzschild black hole/mass in a scalar multipolar Universe, that can be constructed algebraically com
Externí odkaz:
http://arxiv.org/abs/2410.12950
What does a black hole look like? In 1+3 spacetime dimensions, the optical appearance of a black hole is a bidimensional region in the observer's sky often called the black hole shadow, as supported by the EHT observations. In higher dimensions this
Externí odkaz:
http://arxiv.org/abs/2410.05390
Some of the extensions to general relativity and to the Standard Model of particle physics predict families of hypothetical compact objects, collectively known as exotic compact objects (ECOs). This category can be defined to encompass non-Kerr black
Externí odkaz:
http://arxiv.org/abs/2408.09893
Autor:
Adam, Christoph, Mourelle, Jorge Castelo, Filho, Etevaldo dos Santos Costa, Herdeiro, Carlos A. R., Wereszczynski, Andrzej
Bosonic stars represent a hypothetical exotic type of compact stellar objects that could be observed from the gravitational signal of coalescing binaries in current and future gravitational wave detectors. There are two main families of bosonic stars
Externí odkaz:
http://arxiv.org/abs/2406.07613
We investigate the static boson star solutions in the so-called Einstein-Friedberg-Lee-Sirlin (E-FLS) theory, performing a complete analysis of the solution space in this model. We study the phenomenological aspects of E-FLS stars, for instance, by i
Externí odkaz:
http://arxiv.org/abs/2406.02695
Autor:
Bernardo, Rodrigo M. C., Torres, Delfim F. M., Herdeiro, Carlos A. R., Santos, Marco P. Soares dos
Publikováno v:
Heliyon 10 (2024), no. 11, e31771, 1--24
Control algorithms have been proposed based on knowledge related to nature-inspired mechanisms, including those based on the behavior of living beings. This paper presents a review focused on major breakthroughs carried out in the scope of applied co
Externí odkaz:
http://arxiv.org/abs/2406.00084