{
  "annotation_id": "085cbe2c-9075-4ef5-8810-af8637c58481",
  "date_created": "2026-03-02T18:02:27.045000Z",
  "date_modified": "2026-03-02T18:02:27.045000Z",
  "file_hash": "f4cde7bdcb3ca1cc12c3163583c2806b5ff3a605f493a3bc497791f26d29891e",
  "private": false,
  "record": {
    "abstract": "We study two quantum versions of the Eddington clock-synchronization protocol\nin the presence of decoherence. The first protocol uses maximally entangled\nstates to achieve the Heisenberg limit for clock synchronization. The second\nprotocol achieves the limit without using entanglement. We show the equivalence\nof the two protocols under any single-qubit decoherence model that does not\nitself provide synchronization information.",
    "arxiv_id": "quant-ph/0605013",
    "authors": [
      "Sergio Boixo",
      "Carlton M. Caves",
      "Animesh Datta",
      "Anil Shaji"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1134/S1054660X06110065",
    "journal_ref": "Laser Physics, 16, 1525 (2006). Special Issue on Quantum\n  Information and Quantum Computation.",
    "title": "On Decoherence in Quantum Clock Synchronization",
    "url": "https://arxiv.org/abs/quant-ph/0605013"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1748c88e-72cd-47a8-b243-d5f27c8c763f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}