Multi-Photon Entanglement and Quantum Non-Locality
نویسندگان
چکیده
We review recent experiments concerning multi-photon Greenberger–Horne– Zeilinger (GHZ) entanglement. We have experimentally demonstrated GHZ entanglement of up to four photons by making use of pulsed parametric downconversion. On the basis of measurements on three-photon entanglement, we have realized the first experimental test of quantum non-locality following from the GHZ argument. Not only does multi-particle entanglement enable various fundamental tests of quantum mechanics versus local realism, but it also plays a crucial role in many quantum-communication and quantumcomputation schemes.
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