{
  "annotation_id": "f66fb139-871f-47f2-89bd-6ab4a21cbced",
  "date_created": "2026-03-02T18:02:31.107000Z",
  "date_modified": "2026-03-02T18:02:31.107000Z",
  "file_hash": "a000817898b3925fb9c4596edd7af63e427e1b845960e57a57ab74eef863fe67",
  "private": false,
  "record": {
    "abstract": "We provide a general formalism to characterize the cryptographic properties\nof quantum channels in the realistic scenario where the two honest parties\nemploy prepare and measure protocols and the known two-way communication\nreconciliation techniques. We obtain a necessary and sufficient condition to\ndistill a secret key using this type of schemes for Pauli qubit channels and\ngeneralized Pauli channels in higher dimension. Our results can be applied to\nstandard protocols such as BB84 or six-state, giving a critical error rate of\n20% and 27.6%, respectively. We explore several possibilities to enlarge these\nbounds, without any improvement. These results suggest that there may exist\nweakly entangling channels useless for key distribution using prepare and\nmeasure schemes.",
    "arxiv_id": "quant-ph/0610048",
    "authors": [
      "Joonwoo Bae",
      "Antonio Acin"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.012334",
    "journal_ref": "Phys. Rev. A 75, 012334 (2007)",
    "title": "Key distillation from quantum channels using two-way communication   protocols",
    "url": "https://arxiv.org/abs/quant-ph/0610048"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fef94423-21e0-4f42-81ff-6533255078c1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}