IGNORED PARADIGM. “One should bear in mind, however, that the concept of a DP first proposed by one of the authors (M.O.) still seems to be either ignored or tacitly understood differently by the mainstream researchers in optical sciences because of the conceptual difficulty of dealing with off-shell quantities in the midst of field interactions.” (DP = dressed photon).
https://www.mdpi.com/2073-8994/12/8/1244/htm