Results 121 to 130 of about 145,179 (287)

Gauge invariant Noether’s theorem and the proton spin crisis

Journal of High Energy Physics, 2018
Due to proton spin crisis it is necessary to understand the gauge invariant definition of the spin and orbital angular momentum of the quark and gluon from first principle.
Gouranga C. Nayak
doaj   +1 more source

Integrated multi vector vortex beam generator

, 2013
A novel method to generate and manipulate vector vortex beams in an integrated, ring resonator based geometry is proposed. We show numerically that a ring resonator, with an appropriate grating, addressed by a vertically displaced access waveguide emits ...
Boyd, Robert W., Karimi, Ebrahim, Machula, Taras, Schulz, Sebastian A.   +3 more
core   +2 more sources

Two‐Dimensional Triferroics: From Fundamental Couplings to Multifunctional Applications

Advanced Science, EarlyView.
This graphic summarizes the three main types of currently reported 2D triferroic couplings. From the structural perspective, existing systems can be broadly classified into two categories, which exhibit distinct symmetry features and coupling behaviors. Beyond the lattice difference, a third type involves the interplay among ferroelectricity, magnetism,
Yang Li, Jialin Gong, Zhiqing Li
wiley   +1 more source

Orbital Angular Momentum Parton Distributions in Light-Front Dynamics

, 2000
We study the quark angular momentum distribution in the nucleon within a light-front covariant quark model. Special emphasis is put into the orbital angular momentum: a quantity which is very sensitive to the relativistic treatment of the spin in a light-
A. Airapetian, A. Harindranath, A. Mair, A. Mair, B. D. Keister, B.-Q. Ma, B.-Q. Ma, B.-Q. Ma, D. Adams, D. Adams, D. Adams, F. Cano, F. Coester, G. Altarelli, G. Altarelli, I. I. Balitsky, J. Ashman, J. Ashman, J. Carbonell, L. M. Sehgal, M. Beyer, M. Ferraris, M. Ropele, M. Traini, M. Traini, M. Traini, M. Traini, M. Wakamatsu, N. Isgur, N. Isgur, N. Isgur, O. Martin, P. Faccioli, P. Faccioli, P. G. Ratcliffe, P. Hoodbhoy, P. Hoodbhoy, P. Hägler, R. D. Carlitz, R. L. Jaffe, S. J. Brodsky, S. J. Brodsky, S. Scopetta, S. Scopetta, S. Scopetta, S. Scopetta, S. Scopetta, S. V. Bashinsky, V. Barone, X. Ji, X. Ji   +50 more
core   +1 more source

QUARK ORBITAL ANGULAR MOMENTUM IN THE BARYON [PDF]

International Journal of Modern Physics A, 2001
Analytical and numerical results, for the orbital and spin content carried by different quark flavors in the baryons, are given in the chiral quark model with symmetry breaking. The reduction of the quark spin, due to the spin dilution in the chiral splitting processes, is transferred into the orbital motion of quarks and antiquarks.
openaire   +2 more sources

Diverse Landscape of Tunable Magnetic, Topological, and Ferroelectric States in 2D Ti3Se3Te2

Advanced Science, EarlyView.
Ti3Se3Te2 emerges as a multifunctional 2D van der Waals platform. The monolayer is a dynamically stable ferromagnetic quantum anomalous Hall insulator. In bilayers, two stacking configurations yield distinct phases: AA‐stacking hosts an altermagnetic quantum spin Hall insulator, while AA′‐stacking exhibits three‐state in‐plane ferroelectricity ...
Jiangtao Yu, Jingbo Bai, Yali Yang, Shifeng Qian, Xiaotian Wang, Zhuhong Liu   +5 more
wiley   +1 more source

Controlling the orbital angular momentum of high harmonic vortices

Nature Communications, 2017
Few methods can produce orbital angular momentum beams in the extreme ultraviolet or X-ray, and controlling orbital angular momentum on these beams remains challenging. Here the authors apply wave mixing to a tabletop high-harmonic source and control the
Fanqi Kong, Chunmei Zhang, Frédéric Bouchard, Zhengyan Li, Graham G. Brown, Dong Hyuk Ko, T. J. Hammond, Ladan Arissian, Robert W. Boyd, Ebrahim Karimi, P. B. Corkum   +10 more
doaj   +1 more source

Long-Range Fiber Transmission of Optical Vortices [PDF]

, 2011
We use specialty fiber (“vortex fiber”), to create and propagate orbital angular momentum states over ~kilometer lengths in telecom band (~1550nm). The spiral phase structure of the vortex beams was confirmed by interference with a Gaussian reference ...
Bozinovic, Nenad, Kristensen, Poul, Ramachandran, Siddharth   +2 more
core   +1 more source

Geometric Metasurface Fork Gratings for Vortex Beam Generation and Manipulation

, 2016
In recent years, optical vortex beams possessing orbital angular momentum have caught much attention due to their potential for high capacity optical communications.
Cai, Yuan, Cheah, Kok Wai, Chen, Shumei, Li, Guixin, Zhang, Shuang   +4 more
core   +2 more sources

Scanning Tunnelling Microscopy Study of Spin Interactions in Transition‐Metal Phthalocyanine Adsorbates: Mechanisms, Signatures, and Control Strategies

Advanced Science, EarlyView.
Transition‐metal phthalocyanine (TMPc) molecules serve as model systems for probing the spin interactions. This review summarizes recent scanning tunnelling microscopy advances on the spin‐related phenomena in TMPc adsorbates, including Kondo effect, spin excitations, and Yu–Shiba–Rusinov states, emphasizing the mechanisms and control strategies, and ...
Fudi Zhou, Can Zhang, Zhaoteng Dong, Mengya Ren, Lili Zhou, Yu Zhang, Yeliang Wang   +6 more
wiley   +1 more source