{
  "annotation_id": "f87de407-cd23-4f68-8687-f96cf6279655",
  "date_created": "2026-03-02T18:02:05.743000Z",
  "date_modified": "2026-03-02T18:02:05.743000Z",
  "file_hash": "32abdc39e122c462ceb836663ba18719ed13527a91e47b9fb80eb4e95592920c",
  "private": false,
  "record": {
    "abstract": "Single photons are generated from an ensemble of cold Cs atoms via the\nprotocol of Duan et al. [Nature \\textbf{414}, 413 (2001)]. Conditioned upon an\ninitial detection from field 1 at 852 nm, a photon in field 2 at 894 nm is\nproduced in a controlled fashion from excitation stored within the atomic\nensemble. The single-quantum character of the field 2 is demonstrated by the\nviolation of a Cauchy-Schwarz inequality, namely $w(1_{2},1_{2}|1_{1})=0.24\\pm\n0.05\\ngeq 1$, where $w(1_{2},1_{2}|1_{1})$ describes detection of two events\n$(1_{2},1_{2})$ conditioned upon an initial detection $1_{1}$, with $w\\to 0$\nfor single photons.",
    "arxiv_id": "quant-ph/0401147",
    "authors": [
      "C. W. Chou",
      "S. V. Polyakov",
      "A. Kuzmich",
      "H. J. Kimble"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.92.213601",
    "title": "Single-Photon Generation from Stored Excitation in an Atomic Ensemble",
    "url": "https://arxiv.org/abs/quant-ph/0401147"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "bc97da02-e097-48f9-ba5c-6431367c6bf5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}