Results 71 to 80 of about 806,308 (335)

Domain Wall Rebounds Driven by Competing Entropic and Spin‐Transfer Torques in Cylindrical Nanowires

Advanced Functional Materials, EarlyView.
Domain‐wall motion in cylindrical magnetic nanowires driven by nanosecond current pulses. Low current densities efficiently displace domain walls, whereas higher currents cause rebound at the wire ends. The effect results from the interplay between spin‐transfer torque and thermally induced processes, highlighting the role of thermal gradients in ...
Elias Saugar, Jorge Marqués‐Marchán, Sara Catalano, Agustina Asenjo, Michael Foerster, Miguel Angel Niño, Manuel Vazquez, Fèlix Casanova, Arantxa Fraile Rodríguez, Rafael P. Del Real, Oksana Chubykalo‐Fesenko, Cristina Bran   +11 more
wiley   +1 more source

Healthy older adults generate transverse-plane momenta required for 90° turns while walking during the same phases of gait as used in straight-line gait

Journal of NeuroEngineering and Rehabilitation
Background Generation and regulation (control) of linear and angular momentum is a challenge during turning while walking which may be exacerbated by age-related changes.
Mitchell Tillman, Jun Ming Liu, Zahava M. Hirsch, Janine Molino, Antonia M. Zaferiou   +4 more
doaj   +1 more source

Controllable Rotations of Spiraling Elliptic Beams in Anisotropic Linear Media

IEEE Photonics Journal, 2017
We study the rotation properties of spiraling elliptic beams in the anisotropy media. Based on the Collins formula, we obtain the exact analytical solution of the spiraling elliptic beams carrying the orbital angular momentum (OAM) to the paraxial wave ...
Guo Liang, Tingjian Jia, Zhanmei Ren
doaj   +1 more source

Trajectory generation for multi-contact momentum-control

, 2015
Simplified models of the dynamics such as the linear inverted pendulum model (LIPM) have proven to perform well for biped walking on flat ground. However, for more complex tasks the assumptions of these models can become limiting.
Herzog, Alexander, Righetti, Ludovic, Rotella, Nicholas, Schaal, Stefan   +3 more
core   +1 more source

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Holography-based quantum projector in a state space of linear photon momentum

New Journal of Physics, 2015
A transmission volume hologram is evaluated as a quantum projector operating on linear momentum states of individual photons in a four-dimensional state space.
Mark T Gruneisen, James P Black, Raymond C Dymale, Kurt E Stoltenberg   +3 more
doaj   +1 more source

Force, torque, linear momentum, and angular momentum in classical electrodynamics [PDF]

Applied Physics A, 2017
The classical theory of electrodynamics is built upon Maxwell's equations and the concepts of electromagnetic (EM) field, force, energy, and momentum, which are intimately tied together by Poynting's theorem and by the Lorentz force law. Whereas Maxwell's equations relate the fields to their material sources, Poynting's theorem governs the flow of EM ...
openaire   +2 more sources

2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics

Advanced Functional Materials, EarlyView.
2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit, Yifei Yang, Shawn Li, Yu‐Chia Chen, Qi Jia, Jian‐Ping Wang   +5 more
wiley   +1 more source

On the relations between kinetic energy and linear momentum, angular momentum of the particle and of the rigid body

Vietnam Journal of Mechanics, 2001
Using the definition for the partial derivative of a scalar in respect to the vector, this paper presents the relations between kinetic energy and linear momentum, angular momentum of the particle and of the rigid body.
Nguyen Van Khang
doaj   +1 more source

Angular and linear momentum of excited ferromagnets

Physical Review B, 2013
The angular momentum vector of a Heisenberg ferromagnet with isotropic exchange interaction is conserved, while under uniaxial crystalline anisotropy the projection of the total spin along the easy axis is a constant of motion. Using Noether's theorem, we prove that these conservation laws persist in the presence of dipole-dipole interactions. However,
Yan, P. (author), Kamra, A. (author), Cao, Y. (author), Bauer, G.E.W. (author)   +3 more
openaire   +5 more sources