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"OH WATERS, TEEM WITH MEDICINE TO KEEP MY BODY SAFE FROM HARM, SO THAT I MAY LONG SEE THE SUN." - Rig Veda
Anton Zeilinger at the University of Vienna in Austria and a few pals, have produced the first quantum images of an object that are entirely the result of entanglement. “The photons passing through the object are never detected, and the signal photons that are detected never interact with the object,” they say.
The trick is in the experimental setup. This consists of a single beam of green photons that is divided into two. The first of these passes through a crystal that converts each photon into an entangled pair, one of which is red and the other yellow.