Results 101 to 110 of about 1,147,037 (272)

What is the relativistic spin operator?

New Journal of Physics, 2014
Although the spin is regarded as a fundamental property of the electron, there is no universally accepted spin operator within the framework of relativistic quantum mechanics.
Heiko Bauke, Sven Ahrens, Christoph H Keitel, Rainer Grobe   +3 more
doaj   +1 more source

Stable optical lateral forces from inhomogeneities of the spin angular momentum. [PDF]

Sci Adv, 2022
Shi Y, Zhu T, Liu J, Tsai DP, Zhang H, Wang S, Chan CT, Wu PC, Zayats AV, Nori F, Liu AQ.   +10 more
europepmc   +1 more source

Orbital angular momentum of azimuthal spin waves

Physical Review B
5 pages, 2 ...
T. Valet, K. Yamamoto, B. Pigeau, G. de Loubens, O. Klein   +4 more
openaire   +3 more sources

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source

Orbital chirality of light in few-mode step-index optical fibers

APL Photonics
A physical system is considered chiral when it can be distinguished from its mirror image, regardless of the applied translation and rotation. An electromagnetic wave can be chiral through its two essential forms of angular momenta: spin and orbital ...
Karolina Stefańska, Edouard Hertz, Karol Tarnowski, Bertrand Kibler, Pierre Béjot   +4 more
doaj   +1 more source

Four no-go theorems on the existence of spin and orbital angular momentum of massless bosons

SciPost Physics
The past decades have seen substantial interest in the so-called orbital angular momentum (OAM) of light, driven largely by its diverse range of applications.
Eric Palmerduca, Hong Qin
doaj   +1 more source

Nonlinear Optical Response of a Plasmonic Nanoantenna to Circularly Polarized Light: Rotation of Multipolar Charge Density and Near-Field Spin Angular Momentum Inversion. [PDF]

ACS Photonics, 2023
Quijada M, Babaze A, Aizpurua J, Borisov AG.   +3 more
europepmc   +1 more source

Data‐Driven Bulldozer Blade Control for Autonomous Terrain Leveling

Advanced Robotics Research, EarlyView.
A simulation‐driven framework for autonomous bulldozer leveling is presented, combining high‐fidelity terramechanics simulation with a neural‐network‐based reduced‐order model. Gradient‐based optimization enables efficient, low‐level blade control that balances leveling quality and operation time.
Harry Zhang, Ganesh Arivoli, Huzaifa Unjhawala, Luning Bakke, Radu Serban, Dan Negrut   +5 more
wiley   +1 more source

Harnessing of inhomogeneously polarized Hermite-Gaussian vector beams to manage the 3D spin angular momentum density distribution. [PDF]

Nanophotonics, 2022
Khonina SN, Porfirev AP.
europepmc   +1 more source

Laser‐Induced Ultrafast Magnetic Phase Transition in 2D Van Der Waals Antiferromagnetic Heterostructures

Advanced Science, EarlyView.
In this work, ultrafast laser‐induced spin transfer and spin relaxation dynamics in 2D van der Waals antiferromagnetic CrI3/CrGeTe3 heterostructures are investigated. Laser excitation is demonstrated to induce pronounced interlayer nonequilibrium spin dynamics and ultrafast magnetic moment reconstruction, driving a transition from an antiferromagnetic (
Yang Wu, Fulu Zheng, San‐Dong Guo, Thomas Frauenheim, Zhaobo Zhou, Junjie He   +5 more
wiley   +1 more source