Weinberg on the measurement problem

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The forum discussion centers on Steven Weinberg's perspectives on the measurement problem in quantum mechanics, specifically his critique of the realist and instrumentalist approaches. Participants explore the implications of consciousness in quantum mechanics, referencing Eugene Wigner's assertion that consciousness is integral to formulating quantum laws. The conversation also touches on Bohmian mechanics and the necessity of manually updating the wavefunction post-measurement, emphasizing the philosophical implications of these interpretations.

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  • #61
vanhees71 said:
In the standard interpretation you trace out all details which are not resolved. You can do quantum statistics and quantum-many-body theory in the standard formulation very well and straight-forwardly.
My question was about the total system. What does the fact that the environment considered in total still has interference terms mean in the minimal statistical interpretation?
 
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  • #62
It means that, if you could resolve enough microscopic details you should be able to observe the corresponding interference terms, but it's tough to get such details measured. There are, however, some examples, where macroscopic systems show quantum behavior, like two diamonds with entangled phonon modes.
 

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