Objective Wave Function and Non-locality

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Discussion Overview

The discussion revolves around the concept of non-locality in quantum mechanics, particularly in relation to the Many Worlds interpretation and the Copenhagen interpretation with an objective wave function. Participants explore the implications of these interpretations on non-local correlations, especially in the context of Bell inequalities and experimental observations.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants question whether Many Worlds interpretation possesses true non-locality due to the randomness in observations made by Alice and Bob.
  • Others argue that non-locality, defined as the violation of Bell inequalities, is an experimental fact applicable to all interpretations of quantum mechanics.
  • There is a discussion about whether correlations in Many Worlds can be considered classical, with some suggesting that all outputs existing does not equate to classical correlations that violate Bell inequalities.
  • Participants inquire about the nature of correlations observed in experiments, specifically whether Alice and Bob always receive opposite results when measuring spin in the same direction.
  • Questions arise regarding the necessity of large sample sizes in experiments to demonstrate violations of Bell inequalities, with some participants seeking clarification on the statistical requirements.
  • One participant suggests that actual experiments often yield complex results rather than simple direct correlations, raising doubts about the interpretations of observed data.
  • There is a mention of the Bell inequality's implications for local realist hidden variable theories, with a distinction made that Many Worlds and Copenhagen interpretations do not fall under this category.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the nature of non-locality in the Many Worlds interpretation versus the Copenhagen interpretation. Multiple competing views remain regarding the implications of Bell inequalities and the interpretation of experimental results.

Contextual Notes

Participants express uncertainty about the relationship between statistical correlations and the interpretations of quantum mechanics. There are unresolved questions about the assumptions underlying the interpretations and the specific conditions required for experiments to demonstrate non-locality.

Who May Find This Useful

This discussion may be of interest to those exploring interpretations of quantum mechanics, the implications of non-locality, and the experimental validation of quantum theories.

  • #31
lucas_ said:
for very small scale. One automatically needs relativistic quantum theory?

Yes, because to probe small scales experimentally you need high energy particles, i.e., relativistic particles (particles whose total energy is much higher than their rest energy).
 
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  • #32
PeterDonis said:
Yes, because to probe small scales experimentally you need high energy particles, i.e., relativistic particles (particles whose total energy is much higher than their rest energy).

Yes. This is if the probes are electrons or ordinary particles. But in beyond the standard model such as Nikolic's (and Wen's?) fundamental particles in condense matter analogy. It doesn't necessarily mean high energy particles were required to probe them? At least just wanting to know in principle if in beyond standard model. It is possible to have very small particles at small scale that doesn't require high energy probes (non-ordinary particles). If it's more appropriate to response this in the BSM forum. Then better because I want to know the answer to this.
 
  • #33
lucas_ said:
This is if the probes are electrons or ordinary particles.

What else can we probe with?

lucas_ said:
in beyond the standard model

Discussions of such speculative hypotheses belong in the same forum as the other thread you linked to: the Beyond the Standard Model forum. Not this one.
 
  • #34
The OP question has been addressed. Thread closed.
 

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