[Kroniker]

I am a physicist.

I only glossed the article, but from what I gathered, this didn't prove anything about QM, rather it was a technical achievement. One of the biggest problems with entangled pair distribution is actually separating the particles over some distance, because when the entangled particles interact with something ("observed") their state collapses and the entanglement may end.

This is what the achievement was, they managed to not destroy entanglement of a pair over a very long distance.