{
  "annotation_id": "54be20bc-8d51-46a3-b180-3628dbeb1e75",
  "date_created": "2026-03-02T18:01:49.395000Z",
  "date_modified": "2026-03-02T18:01:49.395000Z",
  "file_hash": "08bd60766d3978a9a51ec8c8417ef2a61dc57367268f6515cddadc0008fdc8f6",
  "private": false,
  "record": {
    "abstract": "We present a scheme to produce an entangled four-photon W-state by using\nlinear optical elements. The symmetrical setup of linear optical elements\nconsists of four beam splitters, four polarization beam splitters and four\nmirrors. A photon EPR-pair and two single photons are required as the input\nmodes. The projection on the W-state can be made by a four-photon coincidence\nmeasurement. Further, we show that by means of a horizontally oriented\npolarizer in front of one detector the W-state of three photons can be\ngenerated.",
    "arxiv_id": "quant-ph/0202090",
    "authors": [
      "XuBo Zou",
      "K. Pahlke",
      "W. Mathis"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.66.044302",
    "title": "Scheme for the generation of an entangled four-photon W-state",
    "url": "https://arxiv.org/abs/quant-ph/0202090"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f96ce816-ae57-4b8b-a14a-fcd01eb3f461",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}