{
  "annotation_id": "4f147810-205c-477c-bfc1-9202bc25a113",
  "date_created": "2026-03-02T18:02:06.455000Z",
  "date_modified": "2026-03-02T18:02:06.455000Z",
  "file_hash": "7583515c7648e60d359dbf1059b6c45449a6197013e326b90a41b45bbc06f884",
  "private": false,
  "record": {
    "abstract": "Two-photon absorption is theoretically analyzed within the semiclassical\nformalism of radiation-matter interaction. We consider an ensemble of\ninhomogeneously broadened three-level atoms subjected to the action of two\ncounterpropagating fields of the same frequency. By concentrating in the limit\nof large detuning in one-photon transitions, we solve perturbatively the Bloch\nequations in a non-usual way. In this way we derive an analytical expression\nfor the width of the two-photon resonance that makes evident sub-Doppler\ntwo--photon spectroscopy. We also derive an analytical expression for the Stark\nshift of the two-photon resonance.",
    "arxiv_id": "quant-ph/0402155",
    "authors": [
      "I. Perez-Arjona",
      "G. J. de Valcarcel",
      "Eugenio Roldan"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Revista Mexicana de Fisica 49 (2003) 91-100",
    "title": "Two-Photon Absorption",
    "url": "https://arxiv.org/abs/quant-ph/0402155"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2bb16d3c-551d-40ba-8993-e361316b3895",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}