{
  "annotation_id": "78c9ca3c-6177-4150-a2b5-17d8f07bc4b2",
  "date_created": "2026-03-02T18:02:34.034000Z",
  "date_modified": "2026-03-02T18:02:34.034000Z",
  "file_hash": "9566977fa610297527ab50f7989962a0765c06c9587831d42dc39f496bb0b8d6",
  "private": false,
  "record": {
    "abstract": "We propose schemes for entanglement concentration and purification for qubit\nsystems encoded in flying atomic pairs. We use a cavity-quantum electrodynamics\nsetting as the paradigmatic scenario within which our proposals can be\nimplemented. Maximally entangled pure states of qubits can be produced as a\nresult of our protocols. In particular, the concentration protocol yields Bell\nstates with the largest achievable theoretical probability while the\npurification scheme produces arbitrarily pure Bell states. The requirements for\nthe implementation of these protocols are modest, within the state of the art,\nand we address all necessary steps in two specific set-ups based on\nexperimentally mature microwave technology.",
    "arxiv_id": "quant-ph/0701220",
    "authors": [
      "C. D. Ogden",
      "M. Paternostro",
      "M. S. Kim"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.042325",
    "journal_ref": "Phys. Rev. A 75, 042325 (2007)",
    "title": "Concentration and purification of entanglement for qubit systems with   ancillary cavity fields",
    "url": "https://arxiv.org/abs/quant-ph/0701220"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "06c76843-4423-42b2-9d35-18e18cc2497f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}