Results 1 to 10 of about 199,307 (127)

Tailoring the Topological Charge of a Superposition of Identical Parallel Laguerre–Gaussian Beams [PDF]

Micromachines, 2022
In optical computing machines, data can be transmitted by optical vortices, and the information can be encoded by their topological charges. Thus, some optical mechanisms are needed for performing simple arithmetic operations with the topological charges.
Victor V. Kotlyar, Alexey A. Kovalev, Elena S. Kozlova, Alexandra A. Savelyeva   +3 more
doaj   +2 more sources

The Bloch point 3D topological charge induced by the magnetostatic interaction [PDF]

Scientific Reports, 2021
A hedgehog or Bloch point is a point-like 3D magnetization configuration in a ferromagnet. Regardless of widely spread treatment of a Bloch point as a topological defect, its 3D topological charge has never been calculated. Here, applying the concepts of
F. Tejo, R. Hernández Heredero, O. Chubykalo-Fesenko, K. Y. Guslienko   +3 more
doaj   +2 more sources

High topological charge lasing in quasicrystals [PDF]

Nature Communications
Photonic modes exhibiting a polarization winding akin to a vortex possess an integer topological charge. Lasing with topological charge 1 or 2 can be realized in periodic lattices of up to six-fold rotational symmetry—higher order charges require ...
Kristian Arjas, Jani Matti Taskinen, Rebecca Heilmann, Grazia Salerno, Päivi Törmä   +4 more
doaj   +2 more sources

Soft-Matter Physics Provides New Insights on Myocardial Architecture: Automatic and Quantitative Identification of Topological Defects in the Trabecular Myocardium

Journal of Cardiovascular Development and Disease, 2023
This article is the third in our series dedicated to the analysis of cardiac myoarchitecture as a nematic chiral liquid crystal (NCLC). Previously, we introduced the concept of topological defects (disclinations) and focused on their visual ...
Johanne Auriau, Yves Usson, Pierre-Simon Jouk   +2 more
doaj   +1 more source

Topological charge of a superposition of identical parallel single-ringed Laguerre-Gaussian beams

Компьютерная оптика, 2022
We study a superposition of several identical parallel single-ringed Laguerre-Gaussian beams. Both for the initial plane and for the far field, we show analytically and confirm numerically that if the weighting coefficients of the superposition are real ...
V.V. Kotlyar, A.A. Kovalev, A.A. Savelyeva   +2 more
doaj   +1 more source

Higher topological charge and the QCD vacuum

Physical Review Research, 2020
It is shown that gauge field configurations with higher topological charge modify the structure of the QCD vacuum, which is reflected in its dependence on the CP-violating topological phase θ.
Fabian Rennecke
doaj   +1 more source

Interaction-induced topological charge pump

Physical Review Research, 2020
Based on a topological transition of the symmetry-protected topological phase (SPT), an interaction-induced topological charge pump (iTCP) is proposed with the symmetry-breaking parameter as a synthetic dimension.
Yoshihito Kuno, Yasuhiro Hatsugai
doaj   +1 more source

P6322-type SrNiIO6: An ideal half-metallic candidate with a fully spin-polarized Weyl complex

Results in Physics, 2023
Researchers are interested in magnetic topological materials because they can integrate magnetic and topological properties. Using the first-principles calculations, we identify the P6322-type SrNiIO6 as a dynamically stable half-metallic candidate with ...
Yang Li, Lunsheng Wu, Shikai Zhou, Haibo Wu   +3 more
doaj   +1 more source

Vortex beam generation with variable topological charge based on a spiral slit

Nanophotonics, 2019
We propose a vortex beam generator based on a nanometer spiral slit and explore the propagation rule of the topological charge. Compared to the common methods of generation of a vortex beam with a fixed topological charge, the optical vortex generated by
Wang Han, Liu Lixia, Zhou Changda, Xu Jilian, Zhang Meina, Teng Shuyun, Cai Yangjian   +6 more
doaj   +1 more source

Perfect Lattice Topology: The Quantum Rotor as a Test Case [PDF]

, 1997
Lattice actions and topological charges that are classically and quantum mechanically perfect (i.e. free of lattice artifacts) are constructed analytically for the quantum rotor.
Bell, Berg, Bietenholz, Bietenholz, Bietenholz, Blatter, Burkhalter, D'Elia, DeGrand, DeGrand, DeGrand, DeGrand, DeGrand, Farchioni, Hasenfratz, Lüscher, Manton, R. Brower, S. Chandrasekharan, U.-J. Wiese, W. Bietenholz   +20 more
core   +2 more sources