Spukhafte Fernwirkung

For a pair of entangled particles in the Copenhagen interpretation of quantum mechanics (QM), the measurement of one particle seems to establish a chain of simultaneous causes. Such a chain renders standard QM inconsistent with the reductionism of Einstein, who sought explicitly to permit only temporally ordered causal chains.

Halloween is over (and All Hallows Day is here!), but, in a comment over on my post about the philosophy of science, my brother wrote to ask about an experiment regarding spooky action at a distance.

I just recently read an article claiming that Chinese physicists were able to place a lower bound on the 'speed' of action-at-a-distance. According to the article the 'speed' has a lower bound of 10,000 times the speed of light....

Could you comment on this article and suggest how one ought to approach a claim like this?

Yes!

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