Irreducible representations of the CPT groups in QED
We construct the inequivalent irreducible representations (IIR's) of the CPT groups of the Dirac field operator \hatψ and the electromagnetic quantum potential \hat{A}_μ. The results are valid both for free and interacting (QED) fields. Also, and for the sake of completeness, we construct the IIR's of the CPT group of the Dirac equation.
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