{
  "annotation_id": "dbe535fa-4d6c-4990-88e9-84e592b5d1ae",
  "date_created": "2026-03-02T18:01:45.856000Z",
  "date_modified": "2026-03-02T18:01:45.856000Z",
  "file_hash": "485d68741bf25cd3f20fcf8461fbf78c64b8f723b1c1d1fde8d9943c7b356d65",
  "private": false,
  "record": {
    "abstract": "We present a scheme to produce an entangled four-photon state from two pairs\nof entangled two-photon states. Such entangled four-photon states are\nequivalent to the quantum state of two maximally entangled spin-1 particles.\nThe scheme can also be generated to prepare an entangled 2N-photon state from N\npairs of entangled two-photon states. Such multi-photon states play a crucial\nrole in fundamental tests of quantum mechanics versus local realism and in many\nquantum information and quantum computation schemes.",
    "arxiv_id": "quant-ph/0111014",
    "authors": [
      "XuBo Zou",
      "K. Pahlke",
      "W. Mathis"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "The generation of an entangled four-photon state from two pairs of   entangled two-photon states by using linear optical elements",
    "url": "https://arxiv.org/abs/quant-ph/0111014"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f94861c1-8208-4ff4-a65a-bc8348b38727",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}