{
  "annotation_id": "f7e69e49-4854-460d-b183-161757c9da57",
  "date_created": "2026-03-02T18:01:46.130000Z",
  "date_modified": "2026-03-02T18:01:46.130000Z",
  "file_hash": "fd1549b2bec7616452cccb669def437aab63c6554aab02a9b07ab7a40be332e0",
  "private": false,
  "record": {
    "abstract": "Parametric down-conversion can produce photons that are entangled both in\npolarization and in space. Here we show how the spatial entanglement can be\nused to purify the polarization entanglement using only linear optical\nelements. Spatial entanglement as an additional resource leads to a substantial\nimprovement in entanglement output compared to a previous scheme.\nInterestingly, in the present context the thermal character of down-conversion\nsources can be turned into an advantage. Our scheme is realizable with current\ntechnology.",
    "arxiv_id": "quant-ph/0108063",
    "authors": [
      "Christoph Simon",
      "Jian-Wei Pan"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.89.257901",
    "journal_ref": "Phys. Rev. Lett. 89, 257901 (2002)",
    "title": "Polarization Entanglement Purification using Spatial Entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0108063"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3f198991-fccb-4983-a3e5-6f223de0e320",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}