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For questions related to methods, analysis, accuracy, presentation, or interpretation of measurements. It is not intended for abstract quantum measurement questions such as how a wave function collapses during measurement or how the Heisenberg uncertainty principle constrains quantum measurements.

1 vote

Why can interaction with a macroscopic apparatus, such as a Stern-Gerlach machine, sometimes...

I think the issue is resolved in the transactional picture (TI). In TI, you don't rely on a unitary-only 'decoherence' narrative. Rather, you have genuine collapse and that's what constitutes an actua …
Ruth E Kastner's user avatar