{
  "annotation_id": "ba1c0bea-92b4-49b6-85bc-a4a7c549788d",
  "date_created": "2026-03-02T18:02:47.657000Z",
  "date_modified": "2026-03-02T18:02:47.657000Z",
  "file_hash": "ce06ec8519378b4e13c4fc7f2f07f0323d1353d68500546cc1bfc7a0649da65c",
  "private": false,
  "record": {
    "abstract": "Steep dispersion of opposite signs in driven degenerate two-level atomic\ntransitions have been predicted and observed on the D2 line of 87Rb in an\noptically thin vapor cell. The intensity dependence of the anomalous dispersion\nhas been studied. The maximum observed value of anomalous dispersion [dn/dnu ~=\n-6x10^{-11}Hz^{-1}] corresponds to anegative group velocity V_g ~= -c/23000.",
    "arxiv_id": "quant-ph/9906019",
    "authors": [
      "A. M. Akulshin S. Barreiro A. Lezama"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.83.4277",
    "journal_ref": "Phys.Rev.Lett.83:4277,1999",
    "title": "Steep anomalous dispersion in coherently prepared Rb vapor",
    "url": "https://arxiv.org/abs/quant-ph/9906019"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c187853b-05aa-4e82-9bc8-9ca20fce405e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}