Is Copen­ha­gen or Many Worlds true? An ex­per­i­ment. What? Yes.

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If this pa­per is right, an ex­per­i­ment should be pos­sible.

Build­ing it also doesn’t seem that hard to do tech­nic­ally, so I think it could be in­ter­est­ing to watch in the com­ing months/​years.

If Many Worlds dies, we would seem to have a per­petual mo­tion ma­chine of the second kind. But if the second law of ther­mo­dy­nam­ics pre­vails, Copen­ha­gen should prov­ably be wrong.

All, if this pa­per is right. Does some­body find a mis­take?