Scheme for preparation of the W-state by using linear optical elements
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We present an experimental scheme of preparing the three-photon W-state in this paper. This scheme is based on a linear optical element, four polarization-entangled photons produced in spontaneous parametric down-conversion and single-photon detection. Effects of the imperfection of optical elements on nonlocality are also discussed.
Journal of Optics B: Quantum and semiclassical optics : journal of the European Optical Society