Physicist chiming in. I just want to point out that "quantum light" has a specific meaning in the optics community, and much more restrictive than what you are

Physicist chiming in. I just want to point out that "quantum light" has a specific meaning in the optics community, and much more restrictive than what you are pointing at. All light is quantum in the sense that it is made of discrete photons, but the "quantumness of a light beam" is a quantification of whether you need quantum theory or classical theory to describe the behavior of that beam of that light. Beams for which you need quantum theory, such as single photons, are called "quantum light". Other beams, like the one coming from the sun, are called "classical light". As such I am fine with the usage of "quantum light" in the title. The usage in the text is a bit odd, but technically correct.