Posted: Sep 14, 2011 8:10 pm
I don't see the problem of "localizability". I have no idea from what this comes. It certainly not a topic in QFT. I have nine textbooks on my desk, and none even mention that concept. All particles are subject to the Heisenberg Uncertainty Principle. It's just that fermions obey different statistics than bosons. The only time you will need to consider waves is when you are dealing with a large number of photons. In that case, the wave picture gives you adequate results. But when you deal with one on one: one photon with one electron, or two electrons exchanging a photon, then the particle picture is the only one that makes sense. Either that or you might as well throw Feynman's diagrams under the bus.