{
  "annotation_id": "b8f2c703-b66e-49c1-920b-522eca5166e3",
  "date_created": "2026-03-02T18:02:23.822000Z",
  "date_modified": "2026-03-02T18:02:23.822000Z",
  "file_hash": "dc3b71f85cde952428d802e0b46672ad2af5719274a74838fb6ee92f24ed15af",
  "private": false,
  "record": {
    "abstract": "We propose a Ramsey interferometry experiment using an entangled state of N\natoms to reach the Heisenberg limit for the estimation of an atomic phase shift\nif the atom number parity is perfectly determined. In a more realistic\nsituation, due to statistical fluctuations of the atom source and the finite\ndetection efficiency, the parity is unknown. We then achieve about half the\nHeisenberg limit. The scheme involves an ensemble of circular Rydberg atoms\nwhich dispersively interact successively with two initially empty microwave\ncavities. The scheme does not require very high-Q cavities. An experimental\nrealization with about ten entangled Rydberg atoms is achievable with state of\nart apparatuses.",
    "arxiv_id": "quant-ph/0602006",
    "authors": [
      "David Vitali",
      "Stefan Kuhr",
      "Michel Brune",
      "Jean-Michel Raimond"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1080/09500340600741124",
    "journal_ref": "Journal of Modern Optics 54, 1551 (2007)",
    "title": "A cavity-QED scheme for Heisenberg-limited interferometry",
    "url": "https://arxiv.org/abs/quant-ph/0602006"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d3434047-4b73-4dd9-9061-74d1c84cb563",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}