The idea of Ballentine’s interpretation is that the wavefunction is a tool to compute a probability distribution. Probability distributions are real. Ballentine would accuse many worlders of confusing the map (wavefunctions) for the territory.
You never predict “this is what happens when I send a photon through the slit”- instead you predict “this is what happens when i send lots of photons through a slit.” Its very much the minimal interpretation of quantum mechanics. I recommend skimming through Ballentine’s text (its a very good for many reasons- deriving the Schroedinger equation from galilean relativity, for instance).
The idea of Ballentine’s interpretation is that the wavefunction is a tool to compute a probability distribution. Probability distributions are real. Ballentine would accuse many worlders of confusing the map (wavefunctions) for the territory.
You never predict “this is what happens when I send a photon through the slit”- instead you predict “this is what happens when i send lots of photons through a slit.” Its very much the minimal interpretation of quantum mechanics. I recommend skimming through Ballentine’s text (its a very good for many reasons- deriving the Schroedinger equation from galilean relativity, for instance).