{
  "annotation_id": "7fdf4b2f-3687-4b30-938a-da1b503092e8",
  "date_created": "2026-03-02T18:02:19.486000Z",
  "date_modified": "2026-03-02T18:02:19.486000Z",
  "file_hash": "1055f47328d74f860e6c96c7e2224cef83c88c8508f9816410ca33d610af8b1a",
  "private": false,
  "record": {
    "abstract": "Two schemes for sharing an arbitrary two-qubit state based on entanglement\nswapping are proposed with Bell-state measurements and local unitary\noperations. One is based on the quantum channel with four\nEinstein-Podolsky-Rosen (EPR) pairs shared in advance. The other is based on a\ncircular topological structure, i.e., each user shares an EPR pair with his\nneighboring one. The advantage of the former is that the construction of the\nquantum channel between the agents is controlled by the sender Alice, which\nwill improve the security of the scheme. The circular scheme reduces the\nquantum resource largely when the number of the agents is large. Both of those\nschemes have the property of high efficiency as almost all the instances can be\nused to split the quantum information. They are more convenient in application\nthan the other schemes existing as they require only two-qubit entanglements\nand two-qubit joint measurements for sharing an arbitrary two-qubit state.",
    "arxiv_id": "quant-ph/0509029",
    "authors": [
      "Fu-Guo Deng",
      "Xi-Han Li",
      "Chun-Yan Li",
      "Ping Zhou",
      "Hong-Yu Zhou"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1140/epjd/e2006-00124-1",
    "journal_ref": "The European Physical Journal D 39, 459-464 (2006)",
    "title": "Quantum state sharing of an arbitrary two-qubit state with two-photon   entanglements and Bell-state measurements",
    "url": "https://arxiv.org/abs/quant-ph/0509029"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9a6fe2aa-4c93-429c-9356-e4b4658a8faf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}