Zobrazeno 1 - 10
of 15 233
pro vyhledávání: '"OLIVEIRA, R."'
Autor:
Oliveira, R. R. S.
In this comment, we obtain the complete energy levels for Dvornikov's paper, that is, the energy levels dependent on two quantum numbers, namely, the radial quantum number (given by $N$) and the angular quantum number (given by $J_z$). In particular,
Externí odkaz:
http://arxiv.org/abs/2411.04338
Autor:
Oliveira, R. R. S.
In this paper, we determine the relativistic bound-state solutions for the charged (DO) Dirac oscillator in a rotating frame in the Bonnor-Melvin-Lambda spacetime in $(2+1)$-dimensions, where such solutions are given by the two-component Dirac spinor
Externí odkaz:
http://arxiv.org/abs/2410.17535
Publikováno v:
J Sign Process Syst 95, 495-516 (2023)
The discrete cosine transform (DCT) is a central tool for image and video coding because it can be related to the Karhunen-Lo\`eve transform (KLT), which is the optimal transform in terms of retained transform coefficients and data decorrelation. In
Externí odkaz:
http://arxiv.org/abs/2410.15244
Autor:
Oliveira, R. R. S.
Publikováno v:
Phys. Lett. B 856 (2024) 138888
In this comment, we point out a series of errors made by Senjaya in your paper (2024) \cite{Senjaya}. In particular, these errors involved the Dirac equation in the 3+1 dimensional Schwarzschild spacetime, tetrad field, curved gamma matrices, and the
Externí odkaz:
http://arxiv.org/abs/2407.18790
Autor:
Souza, S. O., Libralato, M., Nardiello, D., Kerber, L. O., Ortolani, S., Pérez-Villegas, A., Oliveira, R. A. P., Barbuy, B., Bica, E., Griggio, M., Dias, B.
NGC~6558 is a low-galactic latitude globular cluster projected in the direction of the Galactic bulge. Due to high reddening, this region presents challenges in deriving accurate parameters, which require meticulous photometric analysis. We present a
Externí odkaz:
http://arxiv.org/abs/2407.15918
Autor:
Lisowska, M., Aleksan, R., Angelis, Y., Aune, S., Bortfeldt, J., Brunbauer, F., Brunoldi, M., Chatzianagnostou, E., Datta, J., Dehmelt, K., Fanourakis, G., Ferry, S., Fiorina, D., Floethner, K. J., Gallinaro, M., Garcia, F., Giomataris, I., Gnanvo, K., Iguaz, F. J., Janssens, D., Kallitsopoulou, A., Kovacic, M., Kross, B., Lai, C. C., Legou, P., Liu, J., Lupberger, M., Maniatis, I., McKisson, J., Meng, Y., Muller, H., De Oliveira, R., Oliveri, E., Orlandini, G., Pandey, A., Papaevangelou, T., Pomorski, M., Robert, M., Ropelewski, L., Sampsonidis, D., Scharenberg, L., Schneider, T., Scorsone, E., Sohl, L., van Stenis, M., Tsipolitis, Y., Tzamarias, S., Utrobicic, A., Vai, I., Veenhof, R., Viezzi, L., Vitulo, P., Volpato, C., Wang, X., White, S., Xi, W., Zhang, Z., Zhou, Y.
The PICOSEC Micromegas detector is a~precise-timing gaseous detector based on a~Cherenkov radiator coupled with a~semi-transparent photocathode and a~Micromegas amplifying structure, targeting a~time resolution of tens of picoseconds for minimum ioni
Externí odkaz:
http://arxiv.org/abs/2407.09953
Autor:
Oliveira, R. R. S.
In this comment, we showed that the line element ("metric'') worked by Jusufi (Eur. Phys. J. C 76: 332, 2016) is incorrect since he worked with a spinning cosmic string with torsion in $(2+1)$-dimensions (and in polar coordinates), which cannot happe
Externí odkaz:
http://arxiv.org/abs/2406.19658
Autor:
Oliveira, R. R. S.
In this paper, we determine the bound-state solutions for Dirac fermions with electric dipole moment (EDM) and position-dependent mass (PDM) in the presence of a radial magnetic field generated by magnetic monopoles. To achieve this, we work with the
Externí odkaz:
http://arxiv.org/abs/2405.16300
Autor:
Oliveira, R. R. S.
In this paper, we study the relativistic energy spectrum for Dirac fermions under rainbow gravity effects in the $(3+1)$-dimensional Bonnor-Melvin-Lambda spacetime, where we work with the curved Dirac equation in cylindrical coordinates. Using the te
Externí odkaz:
http://arxiv.org/abs/2405.12449
Autor:
Oliveira, R. R. S.
Publikováno v:
Class. Quantum Grav. 41, 175017 (2024)
In this paper, we determine the relativistic and nonrelativistic energy levels for Dirac fermions in a spinning conical G\"odel-type spacetime in $(2+1)$-dimensions, where we work with the curved Dirac equation in polar coordinates and we use the tet
Externí odkaz:
http://arxiv.org/abs/2405.11334