{
  "annotation_id": "cbf6bbf1-a6a3-4b5f-b6f4-87962c550139",
  "date_created": "2026-03-02T18:02:30.921000Z",
  "date_modified": "2026-03-02T18:02:30.921000Z",
  "file_hash": "191d6372b26996bc2b97f2a36da85ef4618ee3af04b411b3c330fc99795c349f",
  "private": false,
  "record": {
    "abstract": "We propose quantum cryptographic protocols to secretly communicate a\nreference frame- unspeakable information in the sense it cannot be encoded into\na string of bits. Two distant parties can secretly align their Cartesian axes\nby exchanging N spin 1/2 particles, achieving the optimal accuracy 1/N. A\npossible eavesdropper cannot gain any information without being detected.",
    "arxiv_id": "quant-ph/0608042",
    "authors": [
      "Giulio Chiribella",
      "Lorenzo Maccone",
      "Paolo Perinotti"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.98.120501",
    "journal_ref": "Phys. Phys, Rev. Lett. 98, 120501 (2007)",
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "Secret quantum communication of a reference frame",
    "url": "https://arxiv.org/abs/quant-ph/0608042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b87ef6ea-75c0-4bdb-9db1-b8bf8f22d416",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}