Results 41 to 50 of about 272,456 (331)

Tutorial: Topology, Waves, and the Refractive Index

open access: yesInternational Journal of Theoretical Physics, 2023
AbstractThis tutorial is divided into two parts: the first examines the application of topology to problems in wave physics. The origins of the Chern number are reviewed, where it is shown that this counts the number of critical points of a complex tangent vector field on the surface.
openaire   +2 more sources

Hosoya, Schultz, and Gutman Polynomials of Generalized Petersen Graphs Pn,1 and Pn,2

open access: yesJournal of Mathematics, 2023
The graph theory has wide important applications in various other types of sciences. In chemical graph theory, we have many topological polynomials for a graph G through which we can compute many topological indices.
Ramy Shaheen   +2 more
doaj   +1 more source

An Introduction to Topological Insulators [PDF]

open access: yes, 2013
Electronic bands in crystals are described by an ensemble of Bloch wave functions indexed by momenta defined in the first Brillouin Zone, and their associated energies.
Carpentier, David, Fruchart, Michel
core   +4 more sources

Degree-Based Topological Indices of Boron B12

open access: yesJournal of Chemistry, 2021
Topological index sometimes called molecular descriptor is a numerical value which associates a chemical composition for correlating chemical structure with numerous physical properties, chemical reactivity, or biological activity.
Nouman Saeed   +4 more
doaj   +1 more source

Factorising the 3D topologically twisted index [PDF]

open access: yesJournal of High Energy Physics, 2017
Exploramos la integración de rutas, sobre el contorno de configuraciones de campos hermíticas (no auxiliares), de $$ \mathcal{N}=2 $$ Teoría de la materia de Chern-Simons (TTCSM) topológicamente retorcida en $$ {\mathbb{S}}_2 $$ veces por segmento.
openaire   +4 more sources

Relating the ABC and harmonic indices [PDF]

open access: yesJournal of the Serbian Chemical Society, 2014
The atom-bond connectivity (ABC) index is a much-studied molecular structure descriptor, based on the degrees of the vertices of the molecular graph.
Gutman Ivan, Zhong Lingping, Xu Kexiang
doaj   +1 more source

Comparative study of topological charge [PDF]

open access: yes, 2015
Comparative study of topological charge is performed. Topological charges are measured by a cloverleaf operator on smoothed gauge configurations. Various types of smoothing techniques are employed.
Namekawa, Yusuke
core   +1 more source

Fractional quantum Hall states as an Abelian group [PDF]

open access: yes, 2015
We show that the set of double-layer Fractional Quantum Hall (FQH) states with a given topological order form a finite Abelian group under a new product. This group structure makes it possible to construct new FQH states from known ones.
Nassar, Ali
core   +1 more source

Topological Indices of H-Naphtalenic Nanosheet

open access: yesOpen Chemistry, 2018
In chemical graph theory, a single numeric number related to a chemical structure is called a topological descriptor or topological index of a graph.
Idrees Nazeran   +4 more
doaj   +1 more source

Majorana zero modes bound to a vortex line in a topological superconductor

open access: yes, 2010
We explore Majorana zero modes bound to a vortex line in a three dimensional topological superconductor model, focusing our attention on the validity of the index theorem previously derived.
Fukui, T.
core   +1 more source

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