{
  "annotation_id": "a1f0ef70-fdad-41b7-b113-159b81f4d823",
  "date_created": "2026-03-02T18:00:49.663000Z",
  "date_modified": "2026-03-02T18:00:49.663000Z",
  "file_hash": "373b3c548c9108deededd432d1e4964b2a206b27466f11d734143978dc06770c",
  "private": false,
  "record": {
    "abstract": "We report on the observation of ultralong range interactions in a gas of cold\nRubidium Rydberg atoms. The van-der-Waals interaction between a pair of Rydberg\natoms separated as far as 100,000 Bohr radii features two important effects:\nSpectral broadening of the resonance lines and suppression of excitation with\nincreasing density. The density dependence of these effects is investigated in\ndetail for the S- and P- Rydberg states with main quantum numbers n ~ 60 and n\n~ 80 excited by narrow-band continuous-wave laser light. The density-dependent\nsuppression of excitation can be interpreted as the onset of an\ninteraction-induced local blockade.",
    "arxiv_id": "physics/0404075",
    "authors": [
      "Kilian Singer",
      "Markus Reetz-Lamour",
      "Thomas Amthor",
      "Luis Gustavo Marcassa",
      "Matthias Weidem\u00fcller"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.93.163001",
    "title": "Suppression of Excitation and Spectral Broadening Induced by   Interactions in a Cold Gas of Rydberg Atoms",
    "url": "https://arxiv.org/abs/physics/0404075"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "132ce497-902a-4ee8-9e77-2b556ba8077f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}