期刊
NEW JOURNAL OF PHYSICS
卷 14, 期 -, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1367-2630/14/5/053050
关键词
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资金
- Carnegie Trust for the Universities of Scotland
- UK Engineering and Physical Sciences Research Council (EPSRC)
- Royal Society
- Wolfson Foundation
- Engineering and Physical Sciences Research Council [EP/I012451/1] Funding Source: researchfish
- EPSRC [EP/I012451/1] Funding Source: UKRI
We examine the optical helicity, the optical spin and the ij-infra-zilches in electromagnetic theory and show that these conserved quantities can be combined to form a new description of the angular momentum associated with optical polarization: one that is analogous to the familiar description of optical energy and linear momentum. The symmetries of Maxwell's equations that underlie the conservation of our quantities are presented and discussed. We explain that a similar but distinct set of quantities, Lipkin's zilches, describe the 'angular momentum' of the curl of the electromagnetic field, rather than the angular momentum of the electromagnetic field itself.
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