Minimalist ensemble interpretation

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The discussion revolves around the confusion between the wave function collapse interpretation and the minimalist ensemble interpretation, particularly as articulated by L.E. Ballentine. Participants note that different interpretations of quantum mechanics are observationally indistinguishable, making it difficult to determine an experimentally favored approach. The ensemble interpretation is viewed as taking a realist stance, which some find aligns with Einstein's views on realism. Ballentine's work is appreciated for its depth, yet it raises questions about the acceptance of wave function collapse without scrutiny. Ultimately, the conversation highlights the complexities and philosophical implications of interpreting quantum mechanics.
xboy
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im a bit confused about which interpretation is experimentally favored,wave function collapse or the 'minimalist ensemble interpretation (ala L.E Ballentine' (as Doc Al wrote somewhere)?All the older literature talks about 'reduction of wave packet' but reading Ballentine has left me confused.
 
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All possible experiments and their outcomes should find proper explanation within each framework. I like Ballentine's view though. It's highly devious why everyone should accept the "collapse" without posing legitimacy questions to himself and to the "collapse" adepts.
 
xboy said:
im a bit confused about which interpretation is experimentally favored,wave function collapse or the 'minimalist ensemble interpretation (ala L.E Ballentine' (as Doc Al wrote somewhere)?


BY DEFINITION, different interpretations are observationally indistinguishable, so there cannot be any "experimentally favored" interpretation. One has to judge interpretations differently, and in fact, according to one's way of judging interpretations, one favors one or another more.
 
thanks people.
i'm having some problem understanding what the ensemble interpretation says about an individual system before it is measured.It seems to take a realist stand - is that correct?
 
xboy said:
thanks people.
i'm having some problem understanding what the ensemble interpretation says about an individual system before it is measured.It seems to take a realist stand - is that correct?

Yes, Einstein was an adept of the realist viewpoint. Abd Ballentine took his ideas further and even wrote a treatise on QM based on this view.
 
These papers by Pegg et al. (doi: 10.1016/j.shpsb.2008.02.003 [section 4]; https://www.researchgate.net/publication/230928426_Retrodiction_in_quantum_optics [section 3.2]) seem to show that photon Bell correlations can be inferred using quantum theory in a manner that is compatible with locality by performing quantum retrodiction (i.e. inferring information about the past: e.g. https://doi.org/10.3390/sym13040586; more papers at end) where they evolve backward from Alice's measured outcome...

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