{
  "annotation_id": "0b20fb97-b75f-4f61-81e0-278a2a3063a5",
  "date_created": "2026-03-02T18:00:28.975000Z",
  "date_modified": "2026-03-02T18:00:28.975000Z",
  "file_hash": "9141bc4e7458e9f8d724b6cb1f776ef340835d3b1a624a7ef52ba280d3968d74",
  "private": false,
  "record": {
    "abstract": "We report a precise search for correlation effects in linear chains of 2 and\n3 trapped Ca+ ions. Unexplained correlations in photon emission times within a\nlinear chain of trapped ions have been reported, which, if genuine, cast doubt\non the potential of an ion trap to realize quantum information processing. We\nobserve quantum jumps from the metastable 3d 2D_{5/2} level for several hours,\nsearching for correlations between the decay times of the different ions. We\nfind no evidence for correlations: the number of quantum jumps with separations\nof less than 10 ms is consistent with statistics to within errors of 0.05%; the\nlifetime of the metastable level derived from the data is consistent with that\nderived from independent single-ion data at the level of the experimental\nerrors 1%; and no rank correlations between the decay times were found with\nsensitivity to rank correlation coefficients at the level of |R| = 0.024.",
    "arxiv_id": "physics/0003085",
    "authors": [
      "C. J. S. Donald",
      "D. M. Lucas",
      "P. A. Barton",
      "M. J. McDonnell",
      "J. P. Stacey",
      "D. A. Stevens",
      "D. N. Stacey",
      "A. M. Steane"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1209/epl/i2000-00506-9",
    "journal_ref": "Europhys. Lett., 51(4), pp. 388-394 (2000).",
    "title": "Search for correlation effects in linear chains of trapped ions",
    "url": "https://arxiv.org/abs/physics/0003085"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "cefc2527-e781-41c0-bf9e-ef5798c3decc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}