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The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.

Optical angular-momentum flux*

Open access
Barnett, Stephen M·2002·Journal of Optics B: Quantum and Semiclassical Optics

Abstract

We introduce the angular-momentum flux as the natural description of the angular momentum carried by light. We present four main results: (i) angular-momentum flux is the flow of angular momentum across a surface and, in conjunction with the more familiar angular-momentum density, expresses the conservation of angular momentum. (ii) The angular-momentum flux for a light beam about its axis (or propagation direction) can be separated into spin and orbital parts. This separation is gauge invariant and does not rely on the paraxial approximation. (iii) Angular-momentum flux can describe the propagation of angular momentum in other geometries, but the identification of spin and orbital parts is then more problematic. We calculate the flux for a component of angular momentum that is perpendicular to the axis of a light beam and for the field associated with an electric dipole. (iv) The theory can be extended to quantum electrodynamics.

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Crossref · 10.1088/1464-4266/4/2/361

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Metadata

Authors
Barnett, S. M.
Venue
Journal of Optics B: Quantum and Semiclassical Optics
Published
2002-01-29
Volume
4
Issue
2
Pages
S7-S16
ISSN
  • 1464-4266 (ISSN-L)
  • 1741-3575
OpenAlex
W2045546119
Cited by
292
References
4
FWCI
6.49
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Optical angular-momentum flux*. https://app.cochat.ai/papers/10.1088/1464-4266/4/2/361
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Barnett, S. M. (2002). Optical angular-momentum flux*. Journal of Optics B: Quantum and Semiclassical Optics. https://doi.org/10.1088/1464-4266/4/2/361

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.