{
  "annotation_id": "c57e643c-1499-4d47-9b89-494b753653d6",
  "date_created": "2026-03-02T18:00:57.275000Z",
  "date_modified": "2026-03-02T18:00:57.275000Z",
  "file_hash": "cc6d39997837edece91b73b8aeb62cdd9b3fc05086b07dd7f4bcfdbb6c4ca769",
  "private": false,
  "record": {
    "abstract": "Perturbative contributions to single-beam two-photon transition rates may be\ndivided into two types. The first, involving low-energy intermediate states,\nrequire a high-order perturbation treatment, or an exact diagonalization. The\nother, involving high energy intermediate states, only require a low-order\nperturbation treatment. We show how to partition the effective transition\noperator into two terms, corresponding to these two types, in such a way that a\nmany-body perturbation expansion may be generated that obeys the linked cluster\ntheorem and has a simple diagrammatic representation.",
    "arxiv_id": "physics/0505161",
    "authors": [
      "Chang-Kui Duan",
      "Gang Ruan",
      "Michael F. Reid"
    ],
    "categories": [
      "physics.chem-ph"
    ],
    "doi": "10.1063/1.1802791",
    "journal_ref": "THE JOURNAL OF CHEMICAL PHYSICS 121, 8183-6 (2004)",
    "title": "Calculation of single-beam two-photon absorption rate of lanthanides:   effective operator method and perturbative expansion",
    "url": "https://arxiv.org/abs/physics/0505161"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c1bff77e-1e6e-4da5-9449-7f6228ea85ec",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}