Suchergebnisse
Suchergebnisse:
Vor einem Tag · We introduce and produce experimental optical beams exhibiting periodic skyrmionic polarization lattices at each transverse plane of propagation. These textures are meron lattices formed by tiles mapping hemispheres of the Poincaré sphere. All of the presented fields are combinations of a small number of plane waves. First, we propose square lattices with a Skyrme density (the Jacobian of the ...
Vor einem Tag · In past years, the generalized vector vortex beams (VVBs), also known as higher-order Poincaré sphere (HOPS) beams, 1–3 have received widespread attention due to the complex polarization and phase singularities in the transverse plane. 4,5 The HOPS beams are mainly divided into circularly polarized vortex beams, cylindrical vector beams (CVBs), and elliptically polarized CVBs (EPCVBs ...
Vor 4 Tagen · The output voltage, phase diagram, voltage spectrum and Poincaré map of the TWEH are presented in Fig. 15 when \(U^{2} = 0.1\) (which is lower than the threshold value calculated by using the Melnikov function) and \(\omega = 1\), and it can be found from Fig. 15b that the TWEH realizes intrawell oscillations under the condition, and there are two isolated points in the Poincaré map which ...
Vor 2 Tagen · We propose a fourth-order extension of the geodesic problem arising in the continuity of the study of Riemannian cubics. We consider the variational problem in a Riemannian manifold and derive the Euler-Lagrange equation. For the special situation of Lie groups, we use Euler-Poincaré reduction to obtain the reduced equation on the Lie algebra.
Vor einem Tag · Updated by: With around 20,000 students, the University of Bremen is a medium-sized German university. Bremen offers a wide range of subjects for committed and talented students: a good 100 master's and bachelor's programs as well as the state law examination.
Vor 5 Tagen · In 2015, he was elected as a member of the Chinese Academy of Sciences, and was awarded the seventh “Future Science Award” in 2022. Topic: Mathematical Journey in Pursuit of Truth, Goodness, and Beauty Speaker: Prof. Ngaiming Mok Date: Friday, May 24, 2024 Time: 11:00 a.m. - 12:15 p.m.
Vor 3 Tagen · EN IMAGES - Le 31 mai, la maison de vente Millon met aux enchères plus de 4 000 menus impériaux, présidentiels et royaux. Une collection inédite de plus d'un siècle de réceptions des chefs ...
