Abstract
The difficulties associated with the probability density of photons were recognised by Landau and Peierls as early as 1930 [36]. However, the density obtained by them was not positive-definite, and thus had no physical meaning. Later Zeldovich [37] obtained the following bilinear representation for a number of photons:
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© 1999 Springer Science+Business Media Dordrecht
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Afanasiev, G.N. (1999). Topological Effects for a Free Electromagnetic Field. In: Afanasiev, G.N. (eds) Topological Effects in Quantum Mechanics. Fundamental Theories of Physics, vol 107. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4639-5_8
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DOI: https://doi.org/10.1007/978-94-011-4639-5_8
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-5959-6
Online ISBN: 978-94-011-4639-5
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