{
  "annotation_id": "869ec51c-b96d-4fcc-b3e9-cc955df803b4",
  "date_created": "2026-03-02T18:01:56.612000Z",
  "date_modified": "2026-03-02T18:01:56.612000Z",
  "file_hash": "88cf653d91083f3cdcf591778316073f608b5bbbddd323889b142428cfd7b12c",
  "private": false,
  "record": {
    "abstract": "We study the problem of secret key distillation from bipartite states in the\nscenario where Alice and Bob can only perform measurements at the single-copy\nlevel and classically process the obtained outcomes. Even with these\nlimitations, secret bits can be asymptotically distilled by the honest parties\nfrom any two-qubit entangled state, under any individual attack. Our results\npoint out a complete equivalence between two-qubit entanglement and secure key\ndistribution: a key can be established through a one-qubit channel if and only\nif it allows to distribute entanglement. These results can be generalized to\nhigher dimension for all those states that are one-copy distillable.",
    "arxiv_id": "quant-ph/0303053",
    "authors": [
      "Antonio Acin",
      "Lluis Masanes",
      "Nicolas Gisin"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.91.167901",
    "journal_ref": "Phys. Rev. Lett. 91, 167901 (2003).",
    "title": "Equivalence between two-qubit entanglement and secure key distribution",
    "url": "https://arxiv.org/abs/quant-ph/0303053"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0ac8d9e5-f698-4521-9799-e9f146a6f555",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}