{
  "annotation_id": "0a04a4e1-f49d-4def-a0ff-d442a8bf4dfa",
  "date_created": "2026-03-02T18:02:06.215000Z",
  "date_modified": "2026-03-02T18:02:06.215000Z",
  "file_hash": "9635db462d61629f46c1465b3989bb5ab1af15706074eb41cf3030c1f08aef58",
  "private": false,
  "record": {
    "abstract": "We have measured antinormally ordered Hanbury-Brown--Twiss correlations for\ncoherent states of electromagnetic field by using stimulated parametric\ndown-conversion process. Photons were detected by stimulated emission, rather\nthan by absorption, so that the detection responded not only to actual photons\nbut also to zero-point fluctuations via spontaneous emission. The observed\ncorrelations were distinct from normally ordered ones as they showed excess\npositive correlations, i.e., photon bunching effects, which arose from the\nthermal nature of zero-point fluctuations.",
    "arxiv_id": "quant-ph/0402042",
    "authors": [
      "Koji Usami",
      "Yoshihiro Nambu",
      "Bao-Sen Shi",
      "Akihisa Tomita",
      "Kazuo Nakamura"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.92.113601",
    "journal_ref": "Phys. Rev. Lett. 92, 113601 (2004)",
    "title": "Observation of Antinormally Ordered Hanbury-Brown--Twiss Correlations",
    "url": "https://arxiv.org/abs/quant-ph/0402042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b5802617-0bf4-4f19-876e-d91eab791f65",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}