7 ms·

Pretty sure it's been proven that no deterministic theory can reproduce all the predictions of quantum mechanics. That's the essence of Bell's theorem isn't it?

• drunkpotato 4y ago
  The two explanations or interpretations I’ve come across that recover determinism are many worlds interpretation and superdeterminism. I don’t think either are testable with current technology so it’s not a very satisfying or experimentally useful explanation. At least not yet.
• kloch 4y ago
  From wikipedia: > Consequently, the only way that hidden variables could explain the predictions of quantum physics is if they are "nonlocal", which is to say that somehow the two particles were able to interact instantaneously no matter how widely the two particles are separated. It's true that with our current theories, instantaneous action at a distance does not seem possible. Yet quantum experiments (wave function collapse over large distances) consistently suggest this might be possible at macro (non-quantum) scales. I think our knowledge is incomplete on this topic. Gravity is another area where I don't think non-local effects have been fully ruled out. Gravitational waves (energy emitted/thrown off by certain mass/momentum configurations) have been proven to travel at or near the speed of light, but the propagation speed of the first order gravitational effects an open question. This is an area I would love to see more experimentation done. To simultaneously measure the gravitational and optical positions of the Moon or Sun for example. https://en.wikipedia.org/wiki/Speed_of_gravity https://en.wikipedia.org/wiki/Speed_of_gravity
  • hprotagonist 4y ago
    if you have instantaneous action, you no longer have causality. squaring that circle seems, uh, fraught.
    • feet 4y ago
      Unless they're acting on each other through another euclidian dimension that we can't currently perceive in our three dimensional perspective
      • thfuran 4y ago
        How could there be a higher dimensional, shorter path between the points?
        • akomtu 4y ago
          Wolfram speculated on this idea: if spacetime is a graph, it may approximate the 3+1 topology on average, but in some places two distant nodes can be connected by a direct link. I'd speculate further that such isolated links may be enough to entangle low-level quantum properties of two particles, but not enough to be a tunnel even for a single photon.
          • thfuran 4y ago
            That would not be a euclidean space.
            • akomtu 4y ago
              Who said our universe is euclidean? We just make this assumption for convenience.
              • thfuran 4y ago
                The comment I replied to initially.
        • feet 4y ago
          Why does the path have to be shorter?
          • 4y ago
• immmmmm 4y ago
  Gerard 't Hooft would disagree https://arxiv.org/abs/quant-ph/0212095 https://arxiv.org/abs/quant-ph/0212095
• effie 4y ago
  No. Bell's theorem states that local hidden variable theory obeys Bell's inequalities. Quantum theory models and some experiments with light violate those inequalities. At best, we can conclude that any deterministic theory supplanting quantum theory can't be Bell-local, or that it violates some other assumption of Bell's theorem (e.g. independence of actions at two separated experimental sites).