{
  "annotation_id": "a1bd2041-2f4f-42e6-88ed-9253a176c691",
  "date_created": "2026-03-02T18:01:42.459000Z",
  "date_modified": "2026-03-02T18:01:42.459000Z",
  "file_hash": "694194fad5c58ceecbe1ccba509af68469dc68972e97fcc042c922e0b2c1510a",
  "private": false,
  "record": {
    "abstract": "A wide variety of positioning and ranging procedures are based on repeatedly\nsending electromagnetic pulses through space and measuring their time of\narrival. This paper shows that quantum entanglement and squeezing can be\nemployed to overcome the classical power/bandwidth limits on these procedures,\nenhancing their accuracy. Frequency entangled pulses could be used to construct\nquantum positioning systems (QPS), to perform clock synchronization, or to do\nranging (quantum radar): all of these techniques exhibit a similar enhancement\ncompared with analogous protocols that use classical light. Quantum\nentanglement and squeezing have been exploited in the context of\ninterferometry, frequency measurements, lithography, and algorithms. Here, the\nproblem of positioning a party (say Alice) with respect to a fixed array of\nreference points will be analyzed.",
    "arxiv_id": "quant-ph/0103006",
    "authors": [
      "V. Giovannetti",
      "S. Lloyd",
      "L. Maccone"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1038/35086525",
    "journal_ref": "Nature 412, 417 (2001)",
    "title": "Quantum enhanced positioning and clock synchronization",
    "url": "https://arxiv.org/abs/quant-ph/0103006"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7f2480d4-bfb6-4fe1-8dc4-994093ea5884",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}