{
  "annotation_id": "71a94ecc-91da-4c41-9a22-455bfda453d1",
  "date_created": "2026-03-02T18:01:59.420000Z",
  "date_modified": "2026-03-02T18:01:59.420000Z",
  "file_hash": "c21a182735676cb5ec9e0e81a77a6833c26a7e157183cff374221575cd319b61",
  "private": false,
  "record": {
    "abstract": "The mutual dipole-dipole interaction of atoms in a trap can affect their\nfluorescence. Extremely large effects were reported for double jumps between\ndifferent intensity periods in experiments with two and three Ba^+ ions for\ndistances in the range of about ten wave lengths of the strong transition while\nno effects were observed for Hg^+ at 15 wave lengths. In this theoretical paper\nwe study this question for configurations with three and four levels which\nmodel those of Hg^+ and Ba^+, respectively. For two systems in the Hg^+\nconfiguration we find cooperative effects of up to 30% for distances around one\nor two wave lengths, about 5% around ten wave lengths, and, for larger\ndistances in agreement with experiments, practically none. This is similar for\ntwo V systems. However, for two four-level configurations, which model two Ba^+\nions, cooperative effects are practically absent, and this latter result is at\nodds with the experimental findings for Ba^+.",
    "arxiv_id": "quant-ph/0305125",
    "authors": [
      "Volker Hannstein",
      "Gerhard C. Hegerfeldt"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.043826",
    "journal_ref": "Phys. Rev. A 68, 043826 (2003)",
    "title": "Cooperative fluorescence effects for dipole-dipole interacting systems   with experimentally relevant level configurations",
    "url": "https://arxiv.org/abs/quant-ph/0305125"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b8314641-80dc-4d4c-9a0a-f13243cf1d4f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}