{
  "annotation_id": "169a9b6a-17d8-46ad-9679-a04495c8c847",
  "date_created": "2026-03-02T18:01:42.366000Z",
  "date_modified": "2026-03-02T18:01:42.366000Z",
  "file_hash": "68d5294522af2b6435bbfa39a85f04463313f211ea018331dc132aee6385f6b3",
  "private": false,
  "record": {
    "abstract": "We experimentally demonstrate observation of highly pure four-photon GHZ\nentanglement produced by parametric down-conversion and a projective\nmeasurement. At the same time this also demonstrates teleportation of\nentanglement with very high purity. Not only does the achieved high visibility\nenable various novel tests of quantum nonlocality, it also opens the\npossibility to experimentally investigate various quantum computation and\ncommunication schemes with linear optics. Our technique can in principle be\nused to produce entanglement of arbitrarily high order or, equivalently,\nteleportation and entanglement swapping over multiple stages.",
    "arxiv_id": "quant-ph/0104047",
    "authors": [
      "Jian-Wei Pan",
      "Matthew Daniell",
      "Sara Gasparoni",
      "Gregor Weihs",
      "Anton Zeilinger"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.86.4435",
    "journal_ref": "Phys. Rev. Lett. 86, 4435-4438 (2001)",
    "title": "Experimental Four-photon Entanglement and High-fidelity Teleportation",
    "url": "https://arxiv.org/abs/quant-ph/0104047"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7bcab533-c763-4971-8c75-11dd51e4d14c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}