The helicity of the free electromagnetic field and its physical meaning
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Physically meaningful properties of the field should respect the Heaviside-Larmor symmetry.
“It follows that physically meaningful properties of the fi eld should also respect this symmetry [37] and this idea has been useful in deriving forms for the spin and orbital angular momenta of the fi eld [38, 39] and for its helicity [40 -45].”
From Optical Dirac equation (2014) · cites this paper as [43]
The required form of the helicity density within the optical Dirac equation is obtained by defining the helicity operator to be Σ·p/p^2, yielding the familiar expression.
“which is the familiar expression [40 -45, 78].”
From Optical Dirac equation (2014) · cites this paper as [43]
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References 20 · Cited by 113
- Authors
- Afanasiev, G. N., & Stepanovsky, Y. P.
- Affiliations
- Joint Institute for Nuclear Research (RU)
- Kharkiv Institute of Physics and Technology (UA)
- Corresponding author
- Afanasiev, G. N.
- Venue
- Il Nuovo Cimento A
- Published
- 1996-03
- Volume
- 109
- Issue
- 3
- Pages
- 271-279
- ISSN
- 0369-3546 (ISSN-L)
- 1826-9869
- OpenAlex
- W1968171932
- Cited by
- 113
- References
- 20
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 3 · 2023: 9 · 2022: 19 · 2021: 8 · 2020: 7 · 2019: 13 · 2018: 13 · 2017: 7 · 2016: 5 · 2015: 4 · 2014: 2 · 2013: 4 · 2012: 6
- FWCI
- 0.96
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nuovo cimento della Società italiana di fisica. A, Nuclei, particles and fields (publishedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum and Classical Electrodynamics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Relativity and Gravitational Theory
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Orbital Angular Momentum in Optics
- Keywords
- helicity, free electromagnetic field, circularly polarized photons, gravitational field energy, photon number
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
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