On 12/13/2017 3:15 AM, Bruno Marchal wrote:
The coin does not start in a state of the kind {|heads> + |tails>}, but it starts with a state of having mulitiple positions and multiple momenta, spreaded in the multiverse according to the Heisenberg Uncertainty. The tiny difference in the position can lead to different bouncing in the box, and so, by shaking it a long time enough, I don’t see why we could avoid a superposition of head and tails eventually.
Decoherence is waaay faster than the time for the coin to cross the box from one impact to another, so I don't see how a superposition could develop from shaking the box.
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