Results 31 to 40 of about 15,117 (175)

Une histoire de la famille Poincaré (xviie-xxe siècles)

open access: yesPhilosophia Scientiæ, 2023
The Poincaré family has its roots in Lorraine, in the departments of Meurthe-et-Moselle, Meuse and Vosges. Arrancy-sur-Crusne, Bar-le-Duc, Landaville, Longuyon, Lunéville, Nancy, Neufchâteau, Remenoncourt, Xirocourt are among of the towns and villages ...
Laurent Rollet
doaj   +1 more source

Torsional solutions of convection in rotating fluid spheres [PDF]

open access: yes, 2019
A numerical study of the nonlinear torsional solutions of convection in rotating, internally heated, self-gravitating fluid spheres is presented. Their dependence on the Rayleigh number has been found for two pairs of Ekman (E) and small Prandtl (Pr ...
Net Marcé, Marta   +1 more
core   +2 more sources

Probing non-classicality of primordial gravitational waves and magnetic field through quantum Poincare sphere

open access: yesPhysics Letters B, 2022
The universe is believed to be originated from a quantum state. However, defining measurable quantities for the quantum properties in the present universe has gained interest recently.
Debaprasad Maity, Sourav Pal
doaj   +1 more source

Generation of Vector Vortex Beams Based on the Optical Integration of Dynamic Phase and Geometric Phase

open access: yesPhotonics, 2023
The phase and polarization of electromagnetic waves can be conveniently manipulated by the dynamic phase and geometric phase elements. Here, we propose a compact optical integration of dynamic phase and geometric phase to generate arbitrary vector vortex
Kuiming Zeng   +3 more
doaj   +1 more source

Random Motions at Finite Velocity on Non-Euclidean Spaces

open access: yesMathematics, 2022
In this paper, random motions at finite velocity on the Poincaré half-plane and on the unit-radius sphere are studied. The moving particle at each Poisson event chooses a uniformly distributed direction independent of the previous evolution. This implies
Francesco Cybo Ottone, Enzo Orsingher
doaj   +1 more source

Polarisation control of linear dipole radiation using spin-momentum locking of light [PDF]

open access: yes, 2017
We experimentally demonstrate that a linear dipole is not restricted to emit linearly polarised light, provided it is embedded in the appropriate nanophotonic environment.
Blanquer, Guillaume   +7 more
core   +2 more sources

Revisiting Poincaré Sphere and Pauli Algebra in Polarization Optics

open access: yesPhotonics
We present one of the main lines of development of Poincaré sphere representation in polarization optics, by using largely some of our contributions in the field.
Tiberiu Tudor, Gabriel Voitcu
doaj   +1 more source

Asymptotic symmetries of electromagnetism at spatial infinity

open access: yes, 2018
We analyse the asymptotic symmetries of Maxwell theory at spatial infinity through the Hamiltonian formalism. Precise, consistent boundary conditions are explicitly given and shown to be invariant under asymptotic angle-dependent $u(1)$-gauge ...
Henneaux, Marc, Troessaert, Cédric
core   +3 more sources

Polarization shaping of Poincaré beams by polariton oscillations [PDF]

open access: yes, 2015
We propose theoretically and demonstrate experimentally the generation of light pulses whose polarization varies temporally to cover selected areas of the Poincaré sphere with both tunable swirling speed and total duration (1 ps and 10 ps, respectively ...
Ballarini, Dario   +13 more
core   +3 more sources

Active SU(2) operation on Poincaré sphere

open access: yesResults in Physics
Polarisation is described by an SU(2) state due to the coherence of photons emitted from a ubiquitous laser source. We propose a polarisation modulator, called as a Poincaré rotator, which enables dynamic control over a polarisation state by executing an
Shinichi Saito
doaj   +1 more source

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