Results 21 to 30 of about 234,151 (279)

Topological Descriptors on Some Families of Graphs

open access: yesJournal of Chemistry, 2021
In view of the successful applications of graph theory, relationships between the biological activity and chemical structure have been developed. One of the popular topics in graph theory is problems relating to topological indices.
Iftikhar Ahmad   +3 more
doaj   +1 more source

Localized vortex beams in anisotropic Lieb lattices [PDF]

open access: yes, 2020
We address the issue of nonlinear modes in a two-dimensional waveguide array, spatially distributed in the Lieb lattice geometry, and modeled by a saturable nonlinear Schr\"odinger equation. In particular, we analyze the existence and stability of vortex-
Castillo-Barake, Jorge   +2 more
core   +2 more sources

Standard model as the topological material

open access: yesNew Journal of Physics, 2017
The study of the Weyl and Dirac topological materials (topological semimetals, insulators, superfluids and superconductors) opens the route for the investigation of the topological quantum vacua of relativistic fields. The symmetric phase of the standard
G E Volovik, M A Zubkov
doaj   +1 more source

TOPOLOGICAL STRUCTURAL STABILITY ON PROJECTED SPACES

open access: yesSelecciones Matemáticas, 2016
In this work we study the topological structural stability for a family of nonlinear semigroups Th(·) on Banach spaces Xh which dependent on a parameter h.
Rodiak Figueroa   +3 more
doaj   +1 more source

Geometric stability of topological lattice phases [PDF]

open access: yesNature Communications, 2015
AbstractThe fractional quantum Hall (FQH) effect illustrates the range of novel phenomena which can arise in a topologically ordered state in the presence of strong interactions. The possibility of realizing FQH-like phases in models with strong lattice effects has attracted intense interest as a more experimentally accessible venue for FQH phenomena ...
Jackson, TS, Möller, Gunnar, Roy, Rahul
openaire   +5 more sources

Algebraic renormalization of twisted N=2 supersymmetry with Z=2 central extension [PDF]

open access: yes, 2001
We study the renormalizability of (massive) topological QCD based on the algebraic BRST technique by adopting a non-covariant Landau type gauge and making use of the full topological superalgebra.
Alvarez   +74 more
core   +2 more sources

Direct Demonstration of Topological Stability of Magnetic Skyrmions via Topology Manipulation [PDF]

open access: yesACS Nano, 2020
Topological protection precludes a continuous deformation between topologically inequivalent configurations in a continuum. Motivated by this concept, magnetic skyrmions, topologically nontrivial spin textures, are expected to exhibit the topological stability, thereby offering a prospect as a nanometer-scale non-volatile information carrier.
Soong-Geun Je   +10 more
openaire   +6 more sources

Topologically protected vortex knots and links

open access: yesCommunications Physics, 2022
Ordered materials, such as liquid crystals and Bose-Einstein condensates, support topological vortices, which are analogous to vortices in water, but have qualitatively different properties.
Toni Annala   +2 more
doaj   +1 more source

Topological stability in higher dimensional theories [PDF]

open access: yesNuclear Physics B, 1988
Abstract In theories whose premise is that there are more than four dimensions to space-time it is often difficult to analyze the stability of the compact extra space against quantum fluctuations. We proffer some elementary criteria for a qualitative discussion of this problem, and illustrate their use with a simple model. The influence of background
Duncan, M, Segre, G, Wheater, J
openaire   +1 more source

IMPROVEMENT OF POWER SUPPLY OUTPUT VOLTAGE TEMPERATURE STABILITY BY MEANS OF ANISOTROPY OF ITS CONSTRUCTION THERMAL FIELD

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2018
The article considers the method of thermal stabilization for precision power supply output voltage by means of anisotropy of the construction thermal field.
Denis V. Ozerkin, Arseniy O. Chulkov
doaj   +1 more source

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