{
  "annotation_id": "f2ad606f-1ee4-4fd8-ba28-f48734b8419f",
  "date_created": "2026-03-02T18:02:09.612000Z",
  "date_modified": "2026-03-02T18:02:09.612000Z",
  "file_hash": "412911fb089d68f73cdf91bbfb914e01d91ef1f22ee9fbf3ded94a37963d23bd",
  "private": false,
  "record": {
    "abstract": "Using a 1GW-1ps pump laser pulse in high gain parametric down-conversion\nallows us to detect sub-shot-noise spatial quantum correlation with up to one\nhundred photoelectrons per mode, by means of a high efficiency CCD. The\nstatistics is performed in single-shot over independent spatial replica of the\nsystem. The paper highlights the evidence of quantum correlation between\nsymmetrical signal and idler spatial areas in the far field, in the high gain\nregime. In accordance with the predictions of numerical calculations the\nobserved transition from the quantum to the classical regime is interpreted as\na consequence of the narrowing of the down-converted beams in the very high\ngain regime.",
    "arxiv_id": "quant-ph/0407211",
    "authors": [
      "O. Jedrkiewicz",
      "Y. -K. Jiang",
      "E. Brambilla",
      "A. Gatti",
      "M. Bache",
      "L. A. Lugiato",
      "P. di Trapani"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.93.243601",
    "title": "Detection of sub-shot-noise spatial correlation in high-gain parametric   down-conversion",
    "url": "https://arxiv.org/abs/quant-ph/0407211"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b2ed3d99-2fa6-48ce-aff1-ddc5d1c8879b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}