[reaperman]

Yes, general photonic computing is mostly “theoretical” at the moment. Still, discussion of theory is important. I wish I could add more to your comment but I’m so far out of my depth that it would be simply misleading (blind leading the blind). I believe there’s theory saying it’s theoretically possible to create efficient photon<->matter interfaces which could achieve transistor-like behavior … but there’s too much I don’t understand to be able to evaluate whether there are inherent limitations which kill the practical application of the proposed theoretical mechanisms.

I think companies have come up with some practical applications of limited photonic “computing” at interface edges but I’ve heard that until we no longer need to convert photonics to electronics it won’t surpass electronics for general computing.