3 ms·
Bell's Theorem disproves local hidden variables. Reality can be interpreted as non-local. There has been no conclusive proof it isn't. c isn't a limit on the
by TheOtherHobbes 2y ago
Bell's Theorem disproves local hidden variables.
Reality can be interpreted as non-local. There has been no conclusive proof it isn't.
c isn't a limit on the kind of non-locality that is required, because you can have a mechanism that appears to operate instantaneously - like wavefunction collapse in a huge region of space - but still doesn't allow useful FTL comms.
Bell's Theorem has no problem with this. Some of the Bohmian takes on non-locality have been experimentally disproven, but not all of them.
The Copenhagen POV is that particles do not necessarily exist between observations. Only probabilities exist between observations.
So there has to be some accounting mechanism somewhere which manages the probabilities and makes sure that particle-events are encouraged to happen in certain places/times and discouraged in others, according to what we call the wavefunction.
This mechanism is effectively metaphysical at the moment. It has real consequences and was originally derived by analogy from classical field theory, with a few twists. But it is clearly not the same kind of "object" as either a classical field or particle.
- mnky9800n 2y agoWhy isn’t the accounting mechanism a quantum extension of the principle of least action?
- movpasd 2y agoThere may be no conclusive proof, but it's a philosophically tough pill to swallow. Non-locality means things synchronise instantly across the universe, can go back in time in some reference frames, and yet reality _just so happens_ to censure these secret unobservable wave function components, trading quantum for classical probability so that it is impossible for us to observe the difference between a collapsed and uncollapsed state. Is this really tenable? Strip back the metaphysical baggage and consider the basic purpose of science. We want a theoretical machine that is supplied a description about what is happening now and gives you a description of what will happen in the future. The "state" of a system is just that description. A good _scientific_ theory's description of state is minimal: it has no redundancy, and it has no extraneous unobservables.