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Ancient Quasars Provide Evidence for Quantum Entanglement

• yetihehe 8y ago
  Description in that article is very bad. How can you get correlated photons from some classical light source? Like, you get two random photons and they happen to be correlated?
  • maxander 8y ago
    It's not bad, it's wrong, since they make reference to the "entangled photons in the light coming from the quasars," which is entirely not how the experiment worked. The light from the quasars (which weren't measurably entangled with squat!) were essentially used as random number generators, in order to perform standard Bell test experiment [0] using a standard laboratory entangled-photon source. I recommend reading the paper instead, if you're interested [1]. [0] https://en.wikipedia.org/wiki/Bell_test_experiments https://en.wikipedia.org/wiki/Bell_test_experiments [1] https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.080403 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.12...
  • deleted 8y ago
    [deleted]
  • slowmovintarget 8y ago
    There's really no such thing as a "classical light source". Rather there could be an explanation of observed behavior derived from classical mechanics. What the experiment seeks to do, and claims to have done is to make an observation that can only be explained through non-local quantum entanglement. It's the explanations that are "classical" or "quantum mechanical" not the things in the experiment.