{
  "annotation_id": "3daa568e-ed80-46fe-b24a-80c90a995e26",
  "date_created": "2026-03-02T18:02:13.572000Z",
  "date_modified": "2026-03-02T18:02:13.572000Z",
  "file_hash": "969d4bde0ccac26605bf25d7a02bb5d30bc527330c34f64d5eb905b3571c729a",
  "private": false,
  "record": {
    "abstract": "Each classical public-coin protocol for coin flipping is naturally associated\nwith a quantum protocol for weak coin flipping. The quantum protocol is\nobtained by replacing classical randomness with quantum entanglement and by\nadding a cheat detection test in the last round that verifies the integrity of\nthis entanglement. The set of such protocols defines a family which contains\nthe protocol with bias 0.192 previously found by the author, as well as\nprotocols with bias as low as 1/6 described herein. The family is analyzed by\nidentifying a set of optimal protocols for every number of messages. In the\nend, tight lower bounds for the bias are obtained which prove that 1/6 is\noptimal for all protocols within the family.",
    "arxiv_id": "quant-ph/0502068",
    "authors": [
      "Carlos Mochon"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.022341",
    "journal_ref": "Phys. Rev. A 72, 022341 (2005)",
    "title": "A large family of quantum weak coin-flipping protocols",
    "url": "https://arxiv.org/abs/quant-ph/0502068"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a57c5aaf-1dff-4a8a-baec-cbae5fcbded8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}