{
  "annotation_id": "feb6ff33-0d02-4e64-9721-1632b65b6e6a",
  "date_created": "2026-03-02T18:01:45.855000Z",
  "date_modified": "2026-03-02T18:01:45.855000Z",
  "file_hash": "d7a976899f9f2eb7213f62a84324e9ae297e1520971e433f1f25c66afec386e8",
  "private": false,
  "record": {
    "abstract": "We show how the application of a coupling field connecting the two lower\nmetastable states of a lambda-system can produce a variety of new results on\nthe propagation of a weak electromagnetic pulse. In principle the light\npropagation can be changed from subluminal to superluminal. The negative group\nindex results from the regions of anomalous dispersion and gain in\nsusceptibility.",
    "arxiv_id": "quant-ph/0106107",
    "authors": [
      "G. S. Agarwal",
      "Tarak Nath Dey",
      "Sunish Menon"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.64.053809",
    "journal_ref": "Phys. Rev. A, 64, 053809 (2001)",
    "title": "A Knob for Changing Light Propagation from Subluminal to Superluminal",
    "url": "https://arxiv.org/abs/quant-ph/0106107"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a7939925-4754-4372-9353-cb5e6636e8dd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}