{
  "annotation_id": "2de1f876-ddeb-4473-aa6c-42c6450fe464",
  "date_created": "2026-03-02T18:00:53.784000Z",
  "date_modified": "2026-03-02T18:00:53.784000Z",
  "file_hash": "7d38c0ca9781d6bf3a2a1db711039e04902bbd688cd694f7f5907fdda523b2e1",
  "private": false,
  "record": {
    "abstract": "By varying the density of an ultracold $^{88}$Sr sample from $10^9$ cm$^{-3}$\nto $\u003e 10^{12}$ cm$^{-3}$, we make the first definitive measurement of the\ndensity-related frequency shift and linewidth broadening of the $^1S_0$ -\n$^3P_1$ optical clock transition in an alkaline earth system. In addition, we\nreport the most accurate measurement to date of the $^{88}$Sr $^1S_0 - ^3P_1$\noptical clock transition frequency. Including a detailed analysis of systematic\nerrors, the frequency is ($434 829 121 312 334 \\pm 20_{stat} \\pm 33_{sys}$) Hz.",
    "arxiv_id": "physics/0410110",
    "authors": [
      "Tetsuya Ido",
      "Thomas H. Loftus",
      "Martin M. Boyd",
      "Andrew D. Ludlow",
      "Kevin W. Holman",
      "Jun Ye"
    ],
    "categories": [
      "physics.atom-ph",
      "physics.optics"
    ],
    "doi": "10.1103/PhysRevLett.94.153001",
    "journal_ref": "Phys. Rev. Lett. 94, 153001 (2005)",
    "title": "Precision spectroscopy and density-dependent frequency shifts in   ultracold Sr",
    "url": "https://arxiv.org/abs/physics/0410110"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2de02db7-0e76-4ee4-9a28-5b1b89807171",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}