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Within the Wigner-PDC picture of photon entanglement, detection "errors" arenot independent (though they may look, on average), nor can they be controlledby means of a technological improvement on the detectors. Those two elementsmake possible the interpretation of experimental evidence without the need toexclude local realism: for that reason, we propose the abandonment of the usual(photon, particle-based) description of (PDC-generated) light states, in favourof an also quantum, but field-theoretical description (QED), a description thatfinds a one-to-one equivalent in the Wigner-PDC approach we have advocated inrecent posts.

Bell tests with photon-entanglement: LHV models and critical efficiencies at the light of Wigner-PDC optics