Actually, there are some interpretations of quantum mechanics under which the wavefunction is an "actual thing", for example De Broglie's pilot-wave theory and

Actually, there are some interpretations of quantum mechanics under which the wavefunction is an "actual thing", for example De Broglie's pilot-wave theory and Bohm's developments of it. http://en.wikipedia.org/wiki/Bohm_interpretation http://en.wikipedia.org/wiki/Bohm_interpretation