Phys. Rev. A 57, 2208–2211 (1998)Greenberger-Horne-Zeilinger-state analyzerReceived 24 September 1997; published in the issue dated March 1998 Using just polarizing beam splitters and half-wave plates, we present a practical experimental scheme, by which one can conveniently identify two of the three-particle Greenberger-Horne-Zeilinger (GHZ) states. The scheme can easily be generalized to the N-particle case. The GHZ-state analyzer is essential for multiparticle generalizations of quantum dense coding, quantum teleportation, and entanglement swapping. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.57.2208
DOI:
10.1103/PhysRevA.57.2208
PACS:
03.67.-a, 42.50.Dv
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