{
  "annotation_id": "cacb7e82-2a14-4367-ad51-db588e5a09f2",
  "date_created": "2026-03-02T18:01:56.192000Z",
  "date_modified": "2026-03-02T18:01:56.192000Z",
  "file_hash": "328a9cebb1c6565a506d8986606c7f4488cec61588b0cb9035915b5ee16b0430",
  "private": false,
  "record": {
    "abstract": "We prove the unconditional security of the Bennett 1992 protocol, by using a\nreduction to an entanglement distillation protocol initiated by a local\nfiltering process. The bit errors and the phase errors are correlated after the\nfiltering, and we can bound the amount of phase errors from the observed bit\nerrors by an estimation method involving nonorthogonal measurements. The angle\nbetween the two states shows a trade-off between accuracy of the estimation and\nrobustness to noises.",
    "arxiv_id": "quant-ph/0212162",
    "authors": [
      "Kiyoshi Tamaki",
      "Masato Koashi",
      "Nobuyuki Imoto"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.90.167904",
    "journal_ref": "Phys. Rev. Lett. 90, 167904 (2003)",
    "title": "Unconditionally Secure Key Distribution Based on Two Nonorthogonal   States",
    "url": "https://arxiv.org/abs/quant-ph/0212162"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4f1b2a51-df1e-49ad-8bd4-a3307a9166a2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}