Does local MWT require hidden variables?

In summary, the conversation discusses the possibility of using the many-worlds theory (MWT) as a local explanation for entanglement experiments in quantum physics. The discussion raises the question of whether MWT requires hidden variables to escape common arguments against them, or if it can explain results solely through superposition, interference, and multiple worlds. It is mentioned that proponents support both approaches, with the many-worlds interpretation (MWI) aligning more closely with the latter option.
  • #1
colorSpace
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A while ago I was having an interesting thread here about the possibility of local MWT, MWT as a local explanation of the entanglement experiments. In re-reading this discussion I was wondering whether the proposal of MWT as a local theory means:

a) Hidden variables are necessary but MWT claims to escape the common arguments against hidden variables by assuming multiple worlds.

b) Or MWT claims to explain the results locally even without hidden variables, using only superposition, interference, and multiple worlds as explaining concepts.

c) there are proponents of both ways of thinking.
 
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  • #2
MWI corresponds most closely to your option (b). The wavefunction being reality is meant to explain all the mysteries of quantum physics.
 

1. What are hidden variables in local MWT?

Hidden variables in local MWT refer to any underlying factors or properties that are not directly observable or measurable, but are believed to influence the outcomes of experiments or observations in quantum mechanics.

2. Why is the existence of hidden variables important in local MWT?

The existence of hidden variables is important in local MWT because it can potentially provide a deterministic explanation for the probabilistic nature of quantum mechanics, which is currently not fully understood.

3. How is the presence of hidden variables tested in local MWT?

The presence of hidden variables in local MWT is tested through various experiments and observations, such as Bell's theorem and the violation of Bell's inequalities. These tests aim to show that the results of quantum mechanics cannot be explained solely by the presence of hidden variables.

4. Is there evidence for the existence of hidden variables in local MWT?

At this time, there is no conclusive evidence for the existence of hidden variables in local MWT. Many experiments and observations have been conducted, but none have been able to fully explain the probabilistic nature of quantum mechanics with hidden variables alone.

5. How does the presence or absence of hidden variables impact our understanding of quantum mechanics?

The presence or absence of hidden variables has a significant impact on our understanding of quantum mechanics. If hidden variables are proven to exist and can fully explain the probabilistic nature of quantum mechanics, it would challenge the current understanding of the field and potentially lead to new theories and discoveries. On the other hand, if hidden variables are not found, it would support the current understanding of quantum mechanics as a fundamentally probabilistic theory.

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