{
  "annotation_id": "4f9f339f-5e06-4c49-bf7e-48ed9a4d40f3",
  "date_created": "2026-03-02T18:01:59.605000Z",
  "date_modified": "2026-03-02T18:01:59.605000Z",
  "file_hash": "48b2d52fecf9e4abbf0569152776f5ab7b8eb51421bf93e9d17b240457b152bb",
  "private": false,
  "record": {
    "abstract": "One-photon and two-photon wavepackets of entangled two-photon states in\nspontaneous parametric down-conversion (SPDC) fields are calculated and\nmeasured experimentally. For type-II SPDC, measured one-photon and two-photon\nwavepackets agree well with theory. For type-I SPDC, the measured one-photon\nwavepacket agree with the theory. However, the two-photon wavepacket is much\nbigger than the expected value and the visibility of interference is low. We\nidentify the sources of this discrepancy as the spatial filtering of the\ntwo-photon bandwidth and non-pair detection events caused by the detector\napertures and the tuning curve characteristics of the type-I SPDC.",
    "arxiv_id": "quant-ph/0304181",
    "authors": [
      "Yoon-ho Kim"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/JOSAB.20.001959",
    "journal_ref": "J. Opt. Soc. Am. B vo. 20, p. 1959 (2003).",
    "title": "Measurement of one-photon and two-photon wavepackets in spontaneous   parametric down-conversion",
    "url": "https://arxiv.org/abs/quant-ph/0304181"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0d33617a-645c-414e-8dd5-b048aca93040",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}