{
  "annotation_id": "2b0df64e-6b44-4e4d-a153-62635e6050a2",
  "date_created": "2026-03-02T18:01:46.091000Z",
  "date_modified": "2026-03-02T18:01:46.091000Z",
  "file_hash": "ef5c65ae7184c7309a40871710af1c9957b97d4cffa8461ae37b70f6344b1a8f",
  "private": false,
  "record": {
    "abstract": "Multi-photon states from parametric down-conversion can be entangled both in\npolarization and photon number. Maximal high-dimensional entanglement can be\nconcentrated from these states via photon counting. This makes them natural\ncandidates for quantum key distribution, where the presence of more than one\nphoton per detection interval has up to now been considered as undesirable. We\npropose a simple multi-photon protocol for the case of low losses and point out\nthe robustness of the entanglement under photon loss.",
    "arxiv_id": "quant-ph/0109132",
    "authors": [
      "Gabriel A. Durkin",
      "Christoph Simon",
      "Dik Bouwmeester"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.88.187902",
    "journal_ref": "Physical Review Letters, Vol 88, 187902 (17 April 2002)",
    "title": "Multi-Photon Entanglement Concentration and Quantum Cryptography",
    "url": "https://arxiv.org/abs/quant-ph/0109132"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3142d026-fd0e-4706-9e39-fbdb8e316bd5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}