Plasmons carrying orbital angular momentum in quantum plasmas

2013 ◽  
Vol 79 (5) ◽  
pp. 973-979 ◽  
Author(s):  
SHABBIR A. KHAN ◽  
S. ALI ◽  
J. T. MENDONCA
Keyword(s):  
Angular Momentum ◽  
Electric Field ◽  
Orbital Angular Momentum ◽  
Momentum Density ◽  
Quantum Plasma ◽  
Axial Component ◽  
Hydrodynamic Equations ◽  
Electron Dynamics ◽  
Helical Structures ◽  
Field Lines

AbstractThe existence of plasmons with orbital angular momentum due to the Laguerre–Gaussian-type density and potential perturbations is studied in an unmagnetized quantum plasma. Starting from appropriate hydrodynamic equations for the electrostatic electron dynamics, a dispersion equation is derived in paraxial approximation. The Laguerre–Gaussian beam solutions are obtained and the properties of electric field components, energy flux, and corresponding angular momentum density of plasmons are investigated. The electric field lines are found to form helical structures with a dominant axial component. The results are analyzed numerically and the influence of radial and angular mode numbers on potential and electric field components is illustrated.

scholarly journals Proca tubes with the flux of the longitudinal chromoelectric field and the energy flux/momentum density

2020 ◽  
Vol 80 (11) ◽  
Author(s):  
Vladimir Dzhunushaliev ◽  
Vladimir Folomeev
Keyword(s):  
Angular Momentum ◽  
Scalar Field ◽  
Electric Field ◽  
Energy Flux ◽  
Momentum Density ◽  
Proton Spin ◽  
Longitudinal Electric Field ◽  
Cylindrically Symmetric ◽  
Electric And Magnetic Fields ◽  
Higgs Scalar

AbstractWe consider non-Abelian SU(3) Proca theory with a Higgs scalar field included. Cylindrically symmetric solutions describing classical tubes either with the flux of a longitudinal electric field or with the energy flux (and hence with nonzero momentum density) are obtained. It is shown that, in quantum Proca theory, there can exist tubes both with the flux of the longitudinal electric field and with the energy flux/momentum density simultaneously. An imaginary particle – Proca proton – in which ‘quarks’ are connected by tubes with nonzero momentum density is considered. It is shown that this results in the appearance of the angular momentum related to the presence of the non-Abelian electric and magnetic fields in the tube, and this angular momentum is a part of the Proca proton spin.

scholarly journals Measurement of the orbital angular momentum density of light by modal decomposition

2013 ◽  
Vol 15 (7) ◽  
pp. 073025 ◽  
Author(s):  
Christian Schulze ◽  
Angela Dudley ◽  
Daniel Flamm ◽  
Michael Duparré ◽  
Andrew Forbes
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Momentum Density ◽  
Modal Decomposition ◽  
Orbital Angular Momentum Density
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