I believe most people are familiar with Bell's Theorem. If I understand correctly, the violations of Bell's inequalities are possible due to the existance of entangled quantum states. Although popular discussion often circles around nonlocality questions and doubts about what the experiments say with regards to local realism, we rarely see lengthy discussions about the implications of creating the apparatus itself.
I wonder if it is possible to reasonably view the apparatus as a sort of quantum state detector? In asking this, I am not thinking about a detector as a device that detects a particle, but as a device that has detected the existance of a possible state of particles.
If one thinks of the spin correlation diagram in the article, one might interpret the possible outcomes as two possible system response curves (or possibly zero or one). It seems that if the apparatus is properly tuned to a particular type of particle system, one should always see the quantum result.
Is there some clarity that can be brought to this issue?