Results 71 to 80 of about 52,691 (210)
Topological Photonic Devices and Circuits at Terahertz Frequencies
Laser &Photonics Reviews, EarlyView.This review examines how 3D topological insulators and emerging topological photonic phases enable robust, low‐loss and defect‐immune terahertz devices. Fundamental properties, device implementations and topological transport mechanisms are surveyed, revealing new opportunities for reconfigurable, high‐performance THz components and scalable ...
Samane Kalhor +3 more
wiley +1 more source
Gerbes, simplicial forms and invariants for families of foliated bundles
, 2004 The notion of a gerbe with connection is conveniently reformulated in terms of the simplicial deRham complex. In particular the usual Chern-Weil and Chern-Simons theory is well adapted to this framework and rather easily gives rise to `characteristic ...
Bismut +18 more
core +1 more source
Uncovering Exotic Topological Quantum States in Pure and Magnetically‐Doped Pyrite OsS2
Advanced Quantum Technologies, EarlyView.Pyrite‐structured OsS2 is identified as a fragile topological insulator with an unprecedented 602 meV bandgap, featuring helical surface states and van Hove singularities amenable to ARPES verification. Magnetic doping with Pd, Fe, Ni, or Co induces phase transitions to strong topological insulators, semimetals, 3D quantum anomalous Hall insulators ...
Ali Sufyan +9 more
wiley +1 more source
U(N) Framed Links, Three-Manifold Invariants, and Topological Strings
, 2003 Three-manifolds can be obtained through surgery of framed links in $S^3$. We study the meaning of surgery procedures in the context of topological strings.
Borhade, Pravina +2 more
core +2 more sources
Higher dimensional quantum Hall effect as A-class topological insulator
Nuclear Physics B, 2014 We perform a detail study of higher dimensional quantum Hall effects and A-class topological insulators with emphasis on their relations to non-commutative geometry.
Kazuki Hasebe
doaj +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT This study investigates Japanese university students’ attitudes toward Global Englishes (GE) and Global Englishes Language Teaching (GELT), focusing on how these attitudes are shaped by students’ academic interests and experiences using English as a lingua franca (ELF), both abroad and in domestic EFL contexts.
Natsuno Funada, Heath Rose
wiley +1 more source
Adiabatic continuity between Hofstadter and Chern insulator states
, 2012 We show that the topologically nontrivial bands of Chern insulators are adiabatic cousins of the Landau bands of Hofstadter lattices. We demonstrate adiabatic connection also between several familiar fractional quantum Hall states on Hofstadter lattices ...
J. K. Jain +6 more
core +1 more source
Strong connections and the relative Chern-Galois character for corings
, 2005 The Chern-Galois theory is developed for corings or coalgebras over non-commutative rings. As the first step the notion of an entwined extension as an extension of algebras within a bijective entwining structure over a non-commutative ring is introduced.
Böhm, Gabriella, Brzeziński, Tomasz
openaire +5 more sources
Wilson loop algebras and quantum K-theory for Grassmannians
Journal of High Energy Physics, 2020 We study the algebra of Wilson line operators in three-dimensional N $$ \mathcal{N} $$ = 2 supersymmetric U(M ) gauge theories with a Higgs phase related to a complex Grassmannian Gr(M, N ), and its connection to K-theoretic Gromov-Witten invariants for ...
Hans Jockers +3 more
doaj +1 more source
The holographic c-theorem and infinite-dimensional Lie algebras
Journal of High Energy Physics, 2022 We discuss a non-dynamical theory of gravity in three dimensions which is based on an infinite-dimensional Lie algebra that is closely related to an infinite-dimensional extended AdS algebra.
Eric A. Bergshoeff +2 more
doaj +1 more source