{
  "annotation_id": "ee2393b1-ad62-4b03-9418-b9f9bdd562b7",
  "date_created": "2026-03-02T18:02:13.751000Z",
  "date_modified": "2026-03-02T18:02:13.751000Z",
  "file_hash": "7f5c7fa90a7e0623d44a05ff3ea140c86c0c9df3c54a86510f85976b5c2c67bb",
  "private": false,
  "record": {
    "abstract": "We have applied an entanglement purification protocol to produce a single\nentangled pair of photons capable of violating a CHSH Bell inequality from two\npairs that individually could not. The initial poorly-entangled photons were\ncreated by a controllable decoherence that introduced complex errors. All of\nthe states were reconstructed using quantum state tomography which allowed for\na quantitative description of the improvement of the state after purification.",
    "arxiv_id": "quant-ph/0502026",
    "authors": [
      "P. Walther",
      "K. J. Resch",
      "C. Brukner",
      "A. M. Steinberg",
      "J. -W. Pan",
      "A. Zeilinger"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.94.040504",
    "journal_ref": "Phys. Rev. Lett. 94, 040504 (2005)",
    "title": "Quantum nonlocality obtained from local states by entanglement   purification",
    "url": "https://arxiv.org/abs/quant-ph/0502026"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b216b000-18d3-48d7-8bb0-5c2f3d4b91fc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}