Phys. Rev. A 66, 064301 (2002) [4 pages]Polarization-entangled W state using parametric down-conversionReceived 27 August 2002; published 6 December 2002 An experimental scheme for preparing a polarization entangled W states from four photons emitted by parametric down-conversion is proposed. We consider two different configurations and a method of improving the yield by using single-photon sources. In the proposed scheme, one uses only linear optical elements and photon detectors, so that this scheme is feasible by current technologies. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.064301
DOI:
10.1103/PhysRevA.66.064301
PACS:
03.67.-a, 42.50.-p
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