Each solution to the Schrodinger equation describes a different kind of particle. We assume that QFT is deterministic and complete so each particle will have ex

Each solution to the Schrodinger equation describes a different kind of particle. We assume that QFT is deterministic and complete so each particle will have exactly the same properties as the others of its kind aside from position and momentum (as far as we can tell). As a fun consequence, the theory treats all particles the same -- even so-called quasi-particles! The difference between fundamental and other kinds of particles is that the fundamental particles can exist (at least for a short time before decaying) in vacuo.