I thank R. J. Sciamanda for the nice comments, but must disagree with his views about realism. It is an important topic, because too many physicists, disheartened by the apparent conundrums of standard quantum physics, are giving up on science's endeavor to describe the real world.
There is no reason to regard quantum fields as less real than rocks. Indeed, rocks are made of them. Are electrons and photons not real? If they are, then quantum fields are real because electrons and photons are field quanta.
To discuss this issue, it is sufficient to look only at the non-relativistic limit of the quantized Dirac equation, namely the Schrodinger equation. Here, the issue comes down to the reality of the Schrodinger field (the “wavefunction”). Is it only a calculational tool having nothing to do with reality? I think not. In the double-slit experiment, for example, a real electron comes through one...