While trying to provide an answer to this question, a question popped into my mind. When a charge accelerates, is there always a photon associated with that radiation, or multiple photons? For instance, suppose that a point charge is accelerated with little, and slow varying, acceleration such that the total energy radiated can be calculated by the Larmor formula $$E=\frac{\mu_0 q^2 a^2}{6\pi c}\Delta t$$ Would this always be associated with a photon of energy $E=h f$? Also, is the converse true, that is, does every photon have some radiation associated with it?
So, in short, I'm asking about the interplay of radiation and photon production.