{
  "annotation_id": "6c651d94-2455-4db8-9724-3cee4b8a72fd",
  "date_created": "2026-03-02T18:01:21.557000Z",
  "date_modified": "2026-03-02T18:01:21.557000Z",
  "file_hash": "a781ad4db91ec3332dc96a54fd3c930d35061ad421bd2674714f03daae9ab7e2",
  "private": false,
  "record": {
    "abstract": "Eigenphase shifts and eigentime delays near a resonance for a system of one\ndiscrete state and two continua are shown to be functionals of the Beutler-\nFano formulas using appropriate dimensionless energy units and line profile\nindices. Parameters responsible for the avoided crossing of eigenphase shifts\nand eigentime delays are identified. Similarly, parameters responsible for the\neigentime delays due to a frame change are identified. With the help of new\nparameters, an analogy with the spin model is pursued for the S matrix and time\ndelay matrix. The time delay matrix is shown to comprise three terms, one due\nto resonance, one due to a avoided crossing interaction, and one due to a frame\nchange. It is found that the squared sum of time delays due to the avoided\ncrossing interaction and frame change is unity.",
    "arxiv_id": "physics/9811026",
    "authors": [
      "Chun-Woo Lee"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.58.4581",
    "journal_ref": "Phys. Rev. A 58, 4581 (1998)",
    "title": "Identification of the Beutler-Fano formula in eigenphase shifts and   eigentime delays near a resonance",
    "url": "https://arxiv.org/abs/physics/9811026"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3fef7630-4eb7-4df3-b0d7-078c4d21afa4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}