posted on May, 3 2011 @ 08:00 PM
(Sorry if this was posted already).
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Physicists at the University of Geneva in Switzerland have devised a new kind of quantum experiment using humans as photon detectors, and in doing so
have made the quantum phenomenon of entanglement visible to the naked eye for the first time.
Using a similar set-up to that of Sciarrino, Gisin and his team entangled two photons. One was sent to a standard photon detector, while the other was
amplified using a machine that generated a shower of photons with the same polarization, thereby, in theory, generating a micro–macro entangled
But there was a hitch. What Gisin's team saw was not micro-macro entanglement. Gisin had a nagging suspicion that the Bell test may not be valid for
macroscopic objects, so he deliberately set up the experiment so that the state of the second photon was measured before it was amplified. According
to the rules of quantum mechanics, this act of measurement would break the entanglement, meaning that the first photon and the light field could not
be in an entangled state. The system should not have passed the Bell test.
Even though Gisin's team did not see micro-macro entanglement, he notes that the positive Bell test does show that the original pair of single photons
was entangled before amplification, confirming micro-micro entanglement existed at the start of the experiment.
"The experiment is lovely because in this sense you can 'see' entanglement," says Sciarrino. "It brings quantumness closer to human experience."
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edit on 5/3/2011 by EternalThought because: (no reason given)