{
  "annotation_id": "7d2ce2df-2f6c-463e-8853-7b6a357eecc5",
  "date_created": "2026-03-02T18:01:59.680000Z",
  "date_modified": "2026-03-02T18:01:59.680000Z",
  "file_hash": "a2712a5f971ba4107c256ea159d5854b2a8adf8286375cbe4892419048218026",
  "private": false,
  "record": {
    "abstract": "Properties of entangled photon pairs generated in spontaneous parametric\ndown-conversion are investigated in interference experiments. Strong energy\ncorrelations are demonstrated in a direct way. If a signal photon is detected\nbehind a narrow spectral filter, then interference appears in the Mach-Zehnder\ninterferometer placed in the route of the idler photon, even if the path\ndifference in the interferometer exceeds the coherence length of the light.\nNarrow time correlations of the detection instants are demonstrated for the\nsame photon-pair source using the Hong-Ou-Mandel interferometer. Both these two\neffects may be exhibited only by an entangled state.",
    "arxiv_id": "quant-ph/0306020",
    "authors": [
      "Jan Soubusta",
      "Jan Perina Jr",
      "Martin Hendrych",
      "Ondrej Haderka",
      "Pavel Trojek",
      "Miloslav Dusek"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/j.physleta.2003.10.042",
    "title": "Experimental verification of energy correlations in entangled photon   pairs",
    "url": "https://arxiv.org/abs/quant-ph/0306020"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c0daa103-5112-47bd-afb8-a53d9ecaebf3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}