Results 71 to 80 of about 1,756 (221)

Symmetric Space Cartan Connections and Gravity in Three and Four Dimensions

Symmetry, Integrability and Geometry: Methods and Applications, 2009
Einstein gravity in both 3 and 4 dimensions, as well as some interesting generalizations, can be written as gauge theories in which the connection is a Cartan connection for geometry modeled on a symmetric space.
Derek K. Wise
doaj   +1 more source

Fivebranes and 3-manifold homology

Journal of High Energy Physics, 2017
Motivated by physical constructions of homological knot invariants, we study their analogs for closed 3-manifolds. We show that fivebrane compactifications provide a universal description of various old and new homological invariants of 3-manifolds.
Sergei Gukov, Pavel Putrov, Cumrun Vafa
doaj   +1 more source

Controlling Collective Quasiparticle Dynamics Beyond Decoherence in Topological Interfaces

Laser &Photonics Reviews, EarlyView.
Gold nanoparticles placed above a deformed honeycomb plasmonic crystal couple to a chiral topological interface mode. The pseudospin‐split bands ψ+/ ψ− encode spin‐momentum locking, so emitters radiate directionally along the domain wall and share a common phase.
Fatemeh Davoodi
wiley   +1 more source

Chern—Simons Action and Disclinations [PDF]

, 2018
© 2018, Pleiades Publishing, Ltd. We review the main properties of the Chern—Simons and Hilbert—Einstein actions on a three-dimensional manifold with Riemannian metric and torsion.

core  

Chern-Simons Origin of Superstring Integrability [PDF]

, 2020
We derive the AdS5×S5 Green-Schwarz superstring from four-dimensional Beltrami-Chern-Simons theory reduced on a manifold with singular boundary conditions.
Stefanski, B., Costello, K.
core   +1 more source

A comment on metric vs metric-affine gravity

Physics Letters B, 2023
We consider the sum of the Einstein-Hilbert action and a Pontryagin density (PD) in arbitrary even dimension D≥4. All curvatures are functions of independent affine (torsionless) connections only.
Ulf Lindström, Özgür Sarıoğlu
doaj   +1 more source

Kuga–Satake Construction on Families of K3 Surfaces of Picard Rank 14

Mathematische Nachrichten, EarlyView.
ABSTRACT The isometry between the type IV6 and the type II4 hermitian symmetric domains suggests a possible relation between suitable moduli spaces of K3 surfaces of Picard rank 14 and of polarized abelian 8‐folds with totally definite quaternion multiplication. We show how this isometry induces a geometrically meaningful map between such moduli spaces
Flora Poon
wiley   +1 more source

A Note on Chern-Weil Classes of Cartan Connections

Differential Geometry and its Applications
Minor corrections made in this ...
Luca Accornero, Mateus M. de Melo, Ivan Struchiner   +2 more
openaire   +2 more sources

Chern number of thin films of the topological insulator Bi2Se3

, 2010
In thin films of Bi2Se3, the isospin sectors have nontrivial topological properties, which are conventionally characterized by the Z2 index. The generalized isospin Chern number [ E. Prodan Phys. Rev. B 80 125327 (2009)] is calculated in the general case
Li, Huichao, Sheng, D. N., Xing, D.Y.
core   +2 more sources

Investigation of English Language Learners’ Attitudes Toward Global Englishes and Global Englishes Language Teaching in Relation to Their Academic Interests and Experiences With English as a Global Lingua Franca

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