On 11/6/2014 11:56 AM, Bruno Marchal wrote:
From what I understand, I agree with you. But it is not so clear what the disastrous explanation is. I guess you mean the non local collapse of the wave. OK?
Collapse of the wave function was not a disaster. It was a good heuristic to move forward with. Bohr, correctly, said that the classical world was the necessary arena for science to take place. It's where we can agree on observations, keep records, repeat experiments. So it is epistemologically prior to the world of quantum mechanics. Without the Born rule and the projection postulate the theory would not have been able to predict anything. Everett's MWI still has to implicitly use the Born rule or equivalent to get probabilities. Bohr's influence was unfortunate in delaying appreciation of decoherence, but decoherence also effectively uses the projection postulate in the form of the partial trace.
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