Electrodynamics' spin tensor, apparently, exists. I can be wrong. That
happened to me before. However, see my paper "Mechanical stresses
produced by a light beam", Journal of Modern Optics vol. 55, no. 9,
pp. 1487-1500 (2008).
Also you can get it at www.sciprint.org, Preprint archives, Search
For: author, Text: Khrapko.
The fact of the matter is we are in big trouble. An inclusion of the
spin tensor in the Maxwell electrodynamics will entail rewriting of
all textbooks on the classical field theory. Please see my posts:
"Electrodynamics' spin tensor is a test of professionalism and
honesty," "Silence of the physicists. 2," "Silence of the physicists"
Radi Khrapko
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