{
  "annotation_id": "b8d3de03-9075-4a15-8594-83f10f8ff632",
  "date_created": "2026-03-02T18:02:03.124000Z",
  "date_modified": "2026-03-02T18:02:03.124000Z",
  "file_hash": "b407ec464cb5c96f7a18f584faa67463547de4688b79a89a13744e7dd9d7a181",
  "private": false,
  "record": {
    "abstract": "We present the experimental detection of genuine multipartite entanglement\nusing entanglement witness operators. To this aim we introduce a canonical way\nof constructing and decomposing witness operators so that they can be directly\nimplemented with present technology. We apply this method to three- and\nfour-qubit entangled states of polarized photons, giving experimental evidence\nthat the considered states contain true multipartite entanglement.",
    "arxiv_id": "quant-ph/0309043",
    "authors": [
      "Mohamed Bourennane",
      "Manfred Eibl",
      "Christian Kurtsiefer",
      "Sascha Gaertner",
      "Harald Weinfurter",
      "Otfried Guehne",
      "Philipp Hyllus",
      "Dagmar Bruss",
      "Maciej Lewenstein",
      "Anna Sanpera"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.92.087902",
    "journal_ref": "Phys. Rev. Lett. 92, 087902 (2004)",
    "title": "Witnessing multipartite entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0309043"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c36c37e5-468b-4391-95f7-dd7858ff42a2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}