{
  "annotation_id": "4a986c19-216f-4d1f-9b4d-591cdaca17d5",
  "date_created": "2026-03-02T18:00:57.215000Z",
  "date_modified": "2026-03-02T18:00:57.215000Z",
  "file_hash": "2e472054a26bae1f92867f40ad1ee9fecd59960e06786fbebddf7ff130499b54",
  "private": false,
  "record": {
    "abstract": "We report an experimental demonstration of single-photon switching in\nlaser-cooled $^{87}$Rb atoms. A resonant probe pulse with an energy per unit\narea of one photon per $\\lambda^2/2\\pi$ propagates through the optically thick\natoms. Its energy transmittance is greater than 63% or loss is less than\n$e^{-1}$ due to the effect of electromagnetically induced transparency. In the\npresence of a switching pulse with an energy per unit area of 1.4 photons per\n$\\lambda^2/2\\pi$, the energy transmittance of the same probe pulse becomes less\nthan 37% or $e^{-1}$. This substantial reduction of the probe transmittance\ncaused by single switching photons has potential applications in\nsingle-photon-level nonlinear optics and the manipulation of quantum\ninformation.",
    "arxiv_id": "physics/0501155",
    "authors": [
      "Yong-Fan Chen",
      "Zen-Hsiang Tsai",
      "Yu-Chen Liu",
      "Ite A. Yu"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "title": "Observation of Single-Photon Switching",
    "url": "https://arxiv.org/abs/physics/0501155"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2353b047-b312-471f-9907-cf648dedd3cb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}