Results 1 to 10 of about 52,715 (203)

Symmetric Space Cartan Connections and Gravity in Three and Four Dimensions

open access: yesSymmetry, 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

SL(2,C) Chern–Simons theory, a non-planar graph operator, and 4D quantum gravity with a cosmological constant: Semiclassical geometry

open access: yesNuclear Physics B, 2015
We study the expectation value of a nonplanar Wilson graph operator in SL(2,C) Chern–Simons theory on S3. In particular we analyze its asymptotic behavior in the double-scaling limit in which both the representation labels and the Chern–Simons coupling ...
Hal M. Haggard   +3 more
doaj   +1 more source

A comment on metric vs metric-affine gravity

open access: yesPhysics 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

The well adapted connection of a $(J^{2}=\pm 1)$-metric manifold

open access: yes, 2015
In this paper, we study the well adapted connection attached to a $(J^{2}=\pm 1)$-metric manifold, proving it exists for any of the four geometries and obtaining a explicit formula as a derivation law.
Etayo, Fernando, Santamaría, Rafael
core   +1 more source

Gerbes, simplicial forms and invariants for families of foliated bundles

open access: yes, 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

Higher dimensional quantum Hall effect as A-class topological insulator

open access: yesNuclear 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

Strong connections and the relative Chern-Galois character for corings

open access: yes, 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

open access: yesJournal 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

open access: yesJournal 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

Non-Abelian fractional quantum Hall states and chiral coset conformal field theories

open access: yes, 2000
We propose an effective Lagrangian for the low energy theory of the Pfaffian states of the fractional quantum Hall effect in the bulk in terms of non-Abelian Chern-Simons (CS) actions.
D. C. CABRA   +4 more
core   +1 more source

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