A Conformally Invariant Derivation of Average Electromagnetic Helicity
The average helicity of a given electromagnetic field measures the difference between the number of left- and right-handed photons contained in the field. Here, the average helicity is derived using the conformally invariant inner product for Maxwell fields. Several equivalent integral expressions i...
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Format: | Article |
Language: | English |
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MDPI AG
2019-11-01
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Series: | Symmetry |
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Online Access: | https://www.mdpi.com/2073-8994/11/11/1427 |