Results 21 to 30 of about 39,531 (283)

Linear to circular polarization conversion in the sharp focus of an optical vortex [PDF]

open access: yesКомпьютерная оптика, 2021
We have shown that when sharply focusing a linearly polarized optical vortex with topological charge 2, in the near-axis region of the focal plane, not only does a reverse energy flow (the negative on-axis projection of the Poynting vector) occur, but ...
A.G. Nalimov, S.S. Stafeev
doaj   +1 more source

Lifshitz hydrodynamics at generic z from a moving black brane

open access: yesJournal of High Energy Physics, 2021
A Lifshitz black brane at generic dynamical critical exponent z > 1, with non-zero linear momentum along the boundary, provides a holographic dual description of a non-equilibrium steady state in a quantum critical fluid, with Lifshitz scale invariance ...
Aruna Rajagopal, Larus Thorlacius
doaj   +1 more source

On the Energy-Momentum Density of Gravitational Plane Waves [PDF]

open access: yes, 2004
By embedding Einstein's original formulation of GR into a broader context we show that a dynamic covariant description of gravitational stress-energy emerges naturally from a variational principle.
Bel L   +13 more
core   +2 more sources

Prediction of the electromagnetic torque in synchronous machines through Maxwell stress harmonic filter (HFT) method [PDF]

open access: yes, 2006
For the calculation of torque in synchronous motors a local method is analysed, based on the Maxwell stress theory and the filtered contributions due to the harmonics of the magnetic vector potential in the motor air-gap.
Popescu, M.
core   +1 more source

Divergent part of the stress-energy tensor for Maxwell’s theory in curved space-time: a systematic derivation [PDF]

open access: yesThe European Physical Journal Plus, 2021
AbstractIn this paper the Feynman Green function for Maxwell’s theory in curved space-time is studied by using the Fock–Schwinger–DeWitt asymptotic expansion; the point-splitting method is then applied, since it is a valuable tool for regularizing divergent observables.
Roberto Niardi   +2 more
openaire   +3 more sources

Four-dimensional topological Einstein-Maxwell gravity [PDF]

open access: yes, 2002
The complete on-shell action of topological Einstein-Maxwell gravity in four-dimensions is presented. It is shown explicitly how this theory for SU(2) holonomy manifolds arises from four-dimensional Euclidean N=2 supergravity.
Abe M   +14 more
core   +2 more sources

Lifshitz theory of van der Waals pressure in dissipative media [PDF]

open access: yes, 2010
We derive a first--principles method of determining the van der Waals or Casimir pressure in a dissipative and dispersive planar multilayered system by calculating the Maxwell stress tensor in a fictitious layer of vacuum, that is eventually made to ...
Narayanaswamy, Arvind, Zheng, Yi
core   +3 more sources

The signature of the magnetorotational instability in the Reynolds and Maxwell stress tensors in accretion discs [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2006
9 pages, 4 figures. Minor revisions.
Pessah, Martin Elias   +2 more
openaire   +3 more sources

Analysis Method Development of Hybrid Linear Motor Considering Cogging Force Effect

open access: yesActuators, 2023
This study examines the distributions of the cogging and current forces in a hybrid linear motor and their impact on its performance. Subsequently, using the Maxwell stress tensor to analyze the force acting on the motor, a method has been proposed for ...
Zhixiong Jiang   +3 more
doaj   +1 more source

Post-Newtonian Approximation in Maxwell-Like Form [PDF]

open access: yes, 2009
The equations of the linearized first post-Newtonian approximation to general relativity are often written in "gravitoelectromagnetic" Maxwell-like form, since that facilitates physical intuition.
A. Einstein   +14 more
core   +2 more sources

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