{
  "annotation_id": "6b8e4c30-2c8e-4b9d-adb9-da42eeffff25",
  "date_created": "2026-03-02T18:01:42.660000Z",
  "date_modified": "2026-03-02T18:01:42.660000Z",
  "file_hash": "8d122ac4e4f92bf5eb03baa0c4861d0d09febb19515bc42a38c70770627fb14d",
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  "record": {
    "abstract": "An experimental scheme for concentrating entanglement in partially entangled\nphoton pairs is proposed. In this scheme, two separated parties obtain one\nmaximally entangled photon pair from previously shared two partially entangled\nphoton pairs by local operations and classical communication. A practical\nrealization of the proposed scheme is discussed, which uses imperfect photon\ndetectors and spontaneous parametric down-conversion as a photon source. This\nscheme also works for purifying a class of mixed states.",
    "arxiv_id": "quant-ph/0101042",
    "authors": [
      "Takashi Yamamoto",
      "Masato Koashi",
      "Nobuyuki Imoto"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.64.012304",
    "journal_ref": "Phys. Rev. A64, 012304 (2001)",
    "title": "A Concentration/Purification Scheme for Two Partially Entangled Photon   Pairs",
    "url": "https://arxiv.org/abs/quant-ph/0101042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fb1f5430-bede-445c-a1fc-ab098f21b3e7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}