Experimental Multiparticle Entanglement Swapping for Quantum Networking

Date: 2009-07-07
Authors C. -Y. Lu, T. Yang, and J. -W. Pan
Journal No. Physical Review Letters 103, 020501 (2009)
Abstract This Letter reports the first experimental demonstration of Greenberger-Horne-Zeilinger (GHZ) entanglement swapping. We start with three pairs of entangled photons. Upon projection of three single photons, each from an entangled pair, into a GHZ state, the other three originally independent photons are entangled in a GHZ state—creation of multiparticle entanglement without any direct interaction. This scheme may facilitate networks for quantum telephone exchange, multiparty quantum communication and distributed quantum computation.