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Scheme for the generation of an entangled four-photon W-state

XuBo Zou·K. Pahlke·W. Mathis
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Abstract

We present a scheme to produce an entangled four-photon W-state by using linear optical elements. The symmetrical setup of linear optical elements consists of four beam splitters, four polarization beam splitters and four mirrors. A photon EPR-pair and two single photons are required as the input modes. The projection on the W-state can be made by a four-photon coincidence measurement. Further, we show that by means of a horizontally oriented polarizer in front of one detector the W-state of three photons can be generated.

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XuBo Zou, K. Pahlke, W. Mathis. 2002-08-29. Scheme for the generation of an entangled four-photon W-state. https://doi.org/10.1103/physreva.66.044302

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