Abstract
In the context of the PT-symmetric version of quantum electrodynamics, it is argued that the C-operator introduced in order to define a unitary inner product has nothing to do with charge conjugation.
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Milton, K.A. PT-Symmetric Quantum Field Theory. Czechoslovak Journal of Physics 53, 1069–1072 (2003). https://doi.org/10.1023/B:CJOP.0000010535.56276.7e
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DOI: https://doi.org/10.1023/B:CJOP.0000010535.56276.7e