Yeah, that's a good point, I've just been looking at - https://en.wikipedia.org/wiki/Single-photon_source#Characteristics https://en.wikipedia.org/wiki/Single-p

Yeah, that's a good point, I've just been looking at - https://en.wikipedia.org/wiki/Single-photon_source#Characteristics https://en.wikipedia.org/wiki/Single-photon_source#Character... which talks a little about what deterministic means with respect to a single photon source. It sounds like if it's probabilistic it could also generate multiple photons.