{
  "annotation_id": "d316520e-da82-4711-8a49-b00fa3b44622",
  "date_created": "2026-03-02T18:02:09.997000Z",
  "date_modified": "2026-03-02T18:02:09.997000Z",
  "file_hash": "27c724ffd0c9a725ed2bd99d550d2c8ad6d08e614c0e94bb3c0420e922f7c9d1",
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  "record": {
    "abstract": "A bipartite multiphoton entangled state is created through stimulated\nparametric down-conversion of strong laser pulses in a nonlinear crystal. It is\nshown how detectors that do not resolve photon number can be used to analyze\nsuch multiphoton states. Entanglement of up to 12 photons is detected using\nboth the positivity of the partially transposed density matrix and a newly\nderived criteria. Furthermore, evidence is provided for entanglement of up to\n100 photons. The multi-particle quantum state is such that even in the case of\nan overall photon collection and detection efficiency as low as a few percent,\nentanglement remains and can be detected.",
    "arxiv_id": "quant-ph/0408030",
    "authors": [
      "H. S. Eisenberg",
      "G. Khoury",
      "G. A. Durkin",
      "C. Simon",
      "D. Bouwmeester"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.93.193901",
    "journal_ref": "Phys. Rev. Lett., Vol 93, 193901 (4 November 2004)",
    "title": "Quantum entanglement of a large number of photons",
    "url": "https://arxiv.org/abs/quant-ph/0408030"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "eefb87b4-f840-4985-a7e3-c00d89c1c7dd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}