Results 101 to 110 of about 1,685,988 (224)

Designer Curved-Space Geometry for Relativistic Fermions in Weyl Metamaterials

open access: yesPhysical Review X, 2017
Weyl semimetals are recently discovered materials supporting emergent relativistic fermions in the vicinity of band-crossing points known as Weyl nodes.
Alex Westström, Teemu Ojanen
doaj   +1 more source

W SYMMETRIES: GAUGING AND GEOMETRY [PDF]

open access: green, 1991
Eric Bergshoeff, Adel Bilal, K.S. Stelle
openalex   +1 more source

Nonlocal Lagrangian fields and the second Noether theorem. Non-commutative U(1) gauge theory

open access: yesJournal of High Energy Physics
This article focuses on three main contributions. Firstly, we provide an in-depth overview of the nonlocal Lagrangian formalism. Secondly, we introduce an extended version of the second Noether’s theorem tailored for nonlocal Lagrangians.
Carlos Heredia, Josep Llosa
doaj   +1 more source

Symmetries in Riemann-Cartan Geometries

open access: yesSymmetry, Integrability and Geometry: Methods and Applications
Riemann-Cartan geometries are geometries that admit non-zero curvature and torsion tensors. These geometries have been investigated as geometric frameworks for potential theories in physics including quantum gravity theories and have many important differences when compared to Riemannian geometries.
McNutt, David D.   +2 more
openaire   +2 more sources

Optimal geometry for a quartz multipurpose SPM sensor

open access: yesBeilstein Journal of Nanotechnology, 2013
We propose a geometry for a piezoelectric SPM sensor that can be used for combined AFM/LFM/STM. The sensor utilises symmetry to provide a lateral mode without the need to excite torsional modes.
Julian Stirling
doaj   +1 more source

Symplectic groupoids and Poisson electrodynamics

open access: yesJournal of High Energy Physics
We develop a geometric approach to Poisson electrodynamics, that is, the semi-classical limit of noncommutative U(1) gauge theory. Our framework is based on an integrating symplectic groupoid for the underlying Poisson brackets, which we interpret as the
Vladislav G. Kupriyanov   +2 more
doaj   +1 more source

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