{
  "annotation_id": "55abe665-203b-4abd-9fb6-b5f98121a8ef",
  "date_created": "2026-03-02T18:00:39.824000Z",
  "date_modified": "2026-03-02T18:00:39.824000Z",
  "file_hash": "106a62bbbea03ac6c25018d2dd8968d300676f070a02d58a989dcdc418cc67f5",
  "private": false,
  "record": {
    "abstract": "We have studied the absorption of a weak probe beam through cold rubidium\natoms in a magneto-optic trap. The absorption spectrum shows two peaks with the\nsmaller peak having linewidth as small as 28% of the natural linewidth. The\nmodification happens because the laser beams used for trapping also drive the\natoms coherently between the ground and excited states. This creates\n``dressed\u0027\u0027 states whose energies are shifted depending on the strength of the\ndrive. Linewidth narrowing occurs due to quantum coherence between the dressed\nstates. The separation of the states increases with laser intensity and\ndetuning, as expected from this model.",
    "arxiv_id": "physics/0204021",
    "authors": [
      "Umakant D. Rapol",
      "Ajay Wasan",
      "Vasant Natarajan"
    ],
    "categories": [
      "physics.atom-ph",
      "physics.optics"
    ],
    "doi": "10.1209/epl/i2003-00244-6",
    "journal_ref": "Europhys. Lett., 61 (1), pp. 53--59 (2003)",
    "title": "Observation of sub-natural linewidths for cold atoms in a magneto-optic   trap",
    "url": "https://arxiv.org/abs/physics/0204021"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2bba1155-e595-4290-876a-fc473277ecdf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}