Beautiful new experiment verifies (yet again) that quantum mechanics is weird

A new experiment carried out in the Netherlands has confirmed the “spooky action at a distance” that is a central feature of quantum mechanics.¬† There have been several such confirmations, going back to the early 1980s, but this is is the first one that simultaneously closes all the loopholes that might arise.¬† It may therefore be the final blow to the idea — championed by Einstein and Bell, among others — that quantum mechanics is incomplete and there might be local “hidden variables.”

The preprint version of the paper is available here.

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