{
  "annotation_id": "e2a651ef-2472-43cd-a970-d2f5111116d2",
  "date_created": "2026-03-02T18:02:48.520000Z",
  "date_modified": "2026-03-02T18:02:48.520000Z",
  "file_hash": "e01cfe92d2b999ee91cde59a5d31546a19259e1e5e75322dbfcf6dc4941b8960",
  "private": false,
  "record": {
    "abstract": "Spectroscopic features revealing the coherent interaction of a degenerate\ntwo-level atomic system with two optical fields are examined. A model for the\nnumerical calculation of the response of a degenerate two-level system to the\naction of an arbitrarily intense resonant pump field and a weak probe in the\npresence of a magnetic field is presented. The model is valid for arbitrary\nvalues of the total angular momentum of the lower and upper levels and for any\nchoice of the polarizations of the optical waves. Closed and open degenerate\ntwo-level systems are considered. Predictions for probe absorption and\ndispersion, field generation by four-wave-mixing, population modulation and\nZeeman optical pumping are derived. On all these observables, sub-natural-width\ncoherence resonances are predicted and their spectroscopic features are\ndiscussed. Experimental spectra for probe absorption and excited state\npopulation modulation in the D2 line of Rb vapor are presented in good\nagreement with the calculations",
    "arxiv_id": "quant-ph/9907002",
    "authors": [
      "A. Lezama S. Barreiro A. Lipsich A. M. Akulshin"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Coherent two-field spectroscopy of degenerate two-level systems",
    "url": "https://arxiv.org/abs/quant-ph/9907002"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e9460cff-c0e0-43db-a603-ae388950d05b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}