On 8/13/2018 6:41 AM, Bruno Marchal wrote:
The wave function is not a "physical" object -- it can easily change
instantaneously, just as probabilities change on the advent of new
information.
Then we are no more in Everett non-collapse QM, and I am not sure how
you can explain the double slit or spin polarisation without a
physical wave.
But you are the one who notes that "physical" is not very sharply
defined. If you take Dr. Johnson's view, you can't kick it and have it
kick back. It acts very strangely compared to water and sound waves.
If you provide a photosensitive screen or a detector in front of it, it
will only act at one point, like a particle.
Brent
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