Previous experiments have shown entanglement with one particles . But this is the first to show the entanglement of a photon with itself . The study reveals how when a light photon is observed it changes state . Einstein did n't believe this could happen as it violates theory of relativity .
Previous experiments have shown entanglement with two particles . But this is the first to show the entanglement of a photon with itself . The study reveals how when a light photon is observed it changes state . Einstein did n't believe this could happen as it violates theory of relativity .