{
  "annotation_id": "54eef08d-22c4-4868-ad3f-6b11091b3d1a",
  "date_created": "2026-03-02T18:02:13.791000Z",
  "date_modified": "2026-03-02T18:02:13.791000Z",
  "file_hash": "846b88f108f42ce4cf900dfd780caaff2b3d98c645faf5d6052aed42fb7ba89a",
  "private": false,
  "record": {
    "abstract": "A simple scheme to prepare an entanglement between two separated qubits from\na given mixed state is proposed. A single qubit (entanglement mediator) is\nrepeatedly made to interact locally and consecutively with the two qubits\nthrough rotating-wave couplings and is then measured. It is shown that we need\nto repeat this kind of process only three times to establish a maximally\nentangled state directly from an arbitrary initial mixed state, with no need to\nprepare the state of the qubits in advance or to rearrange the setup step by\nstep. Furthermore, the maximum yield realizable with this scheme is compatible\nwith the maximum entanglement, provided that the coupling constants are\nproperly tuned.",
    "arxiv_id": "quant-ph/0411193",
    "authors": [
      "Kazuya Yuasa",
      "Hiromichi Nakazato"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1143/PTP.114.523",
    "journal_ref": "Prog. Theor. Phys. 114 (2005) 523-531",
    "title": "A Simple Scheme to Entangle Distant Qubits from a Mixed State via an   Entanglement Mediator",
    "url": "https://arxiv.org/abs/quant-ph/0411193"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d4cedbeb-b3aa-404c-8f6a-6d6336af41d0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}