{
  "annotation_id": "09b27832-dc89-4d71-9148-26fcf4c35661",
  "date_created": "2026-03-02T18:01:42.184000Z",
  "date_modified": "2026-03-02T18:01:42.184000Z",
  "file_hash": "f852a70e0883ad29790902268a101fa6f714d052a038b4bba69c4d9b9067e7cb",
  "private": false,
  "record": {
    "abstract": "Recent work has raised the possibility that quantum information theory\ntechniques can be used to synchronize atomic clocks nonlocally. One of the\nproposed algorithms for quantum clock synchronization (QCS) requires\ndistribution of entangled pure singlets to the synchronizing parties. Such\nremote entanglement distribution normally creates a relative phase error in the\ndistributed singlet state which then needs to be purified asynchronously. We\npresent a fully relativistic analysis of the QCS protocol which shows that\nasynchronous entanglement purification is not possible, and, therefore, that\nthe proposed QCS scheme remains incomplete. We discuss possible directions of\nresearch in quantum information theory which may lead to a complete, working\nQCS protocol.",
    "arxiv_id": "quant-ph/0010097",
    "authors": [
      "Ulvi Yurtsever",
      "Jonathan P. Dowling"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.65.052317",
    "title": "A Lorentz-invariant look at quantum clock synchronization protocols   based on distributed entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0010097"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "938c5767-9d9d-436f-9768-40d2a011622f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}