Zobrazeno 1 - 10
of 2 486
pro vyhledávání: '"Santos, G. A."'
Autor:
de Oliveira, M. Gil, Junior, A. L. S. Santos, Barbosa, A. C., da Silva, B. Pinheiro, Santos, G. H. dos, Cañas, G., Ribeiro, P. H. Souto, Walborn, S. P., Khoury, A. Z.
We investigate theoretically and experimentally the optical second harmonic generation (SHG) with a twisted Gaussian Schell model (TGSM) beam as the fundamental field. We use Type-II phase matching and analyze the cross spectral density (CSD) of the
Externí odkaz:
http://arxiv.org/abs/2403.04040
Autor:
Rodrigues, L. M., Fagundes, L. Marques, Salles, D. C., Santos, G. H. dos, Kondo, J. M., Khoury, A. Z., Ribeiro, P. H. Souto, de Araújo, R. Medeiros
We experimentally demonstrate resonance of first-order vector vortex beams (VVB) with a triangular optical cavity. We also show that, due to their symmetry properties, the so-called radial and azimuthal VVBs do not resonate at the same cavity length,
Externí odkaz:
http://arxiv.org/abs/2310.15391
Autor:
Santos, G. R., Neves, M. J.
Publikováno v:
International Journal of Modern Physics A, 2450045 (2024) 1-9
The effects of the Ohmic and magnetic density currents are investigated in the linearized Euler-Heisenberg electrodynamics. The linearization is introduced through an external magnetic field, in which the vector potential of the Euler-Heisenberg elec
Externí odkaz:
http://arxiv.org/abs/2311.02080
A study of double charmed meson production in proton-proton and proton-nucleus collisions at the LHC energies is performed. Based on the color dipole formalism developed in the transverse momentum representation and the double parton scattering mecha
Externí odkaz:
http://arxiv.org/abs/2309.07686
Publikováno v:
Quantum 8, 1317 (2024)
Accelerated light has been demonstrated with laser light and diffraction. Within the diffracting field it is possible to identify a portion that carries most of the beam energy, which propagates in a curved trajectory as it would have been accelerate
Externí odkaz:
http://arxiv.org/abs/2308.01764
Autor:
Stauber, T., Wackerl, M., Wenk, P., Margetis, D., González, J., Gómez-Santos, G., Schliemann, J.
Publikováno v:
Small Science 3, 2200080 (2023)
We discuss the full optical response of twisted bilayer graphene at the neutrality point close to the magic angle within the continuum model (CM). Firstly, we identify three different channels consistent with the underlying $D_3$ symmetry, yielding t
Externí odkaz:
http://arxiv.org/abs/2209.00958
Autor:
da Silva, B. Pinheiro, Santos, G. H. dos, de Oliveira, A. G., da Silva, N. Rubiano, Buono, W. T., Gomes, R. M., Soares, W. C., Jesus-Silva, A. J., Fonseca, E. J. S., Ribeiro, P. H. Souto, Khoury, A. Z.
A triangular-lattice pattern is observed in light beams resulting from the spatial cross modulation between an optical vortex and a triangular shaped beam undergoing parametric interaction. Both up- and down-conversion processes are investigated, and
Externí odkaz:
http://arxiv.org/abs/2206.06153
We use spin-lattice dynamics simulations to study the possibility of modeling the magnetic hysteresis behavior of a ferromagnetic material. The temporal evolution of the magnetic and mechanical degrees of freedom is obtained through a set of two coup
Externí odkaz:
http://arxiv.org/abs/2205.10418
Publikováno v:
Eur.Phys.J. C 82 (2022) 795
The $D$-meson production is investigated by considering the unintegrated gluon distribution within the dipole approach in the momentum representation. We analyze the $D$-meson spectrum accounting for the effects of nonlinear behavior of the QCD dynam
Externí odkaz:
http://arxiv.org/abs/2205.00925
Publikováno v:
JCAP08(2022)062
The possible time variation of the fundamental constants of nature has been an active subject of research since the large-number hypothesis was proposed by Dirac. In this paper, we propose a new method to investigate a possible time variation of the
Externí odkaz:
http://arxiv.org/abs/2204.06459