What does "Local-hidden-state Model" mean?

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The local-hidden-state model is a way to explain the behavior of particles in quantum mechanics. It suggests that when two particles are connected, the properties of one particle can seem to affect the other, even when they are far apart. According to this model, each particle has a "hidden state" that determines how it behaves.

In simpler terms, you can think of it like two friends who always know what the other is thinking. No matter how far apart they are, they can still predict each other's actions based on their secret understanding. The local-hidden-state model tries to show that this kind of connection can happen without breaking the rules of classical physics.

However, experiments in quantum mechanics have shown that this model doesn't always hold true. Sometimes, the particles act in ways that can't be explained just by their hidden properties. This leads to a contradiction between the local-hidden-state model and what we observe in the quantum world.

In quantum mechanics, the interactions between particles can be much stranger than what this model suggests, leading to discussions about what really happens at the quantum level.