{
  "annotation_id": "2ed9656a-3342-43ec-8af3-391650868d52",
  "date_created": "2026-03-02T18:02:47.990000Z",
  "date_modified": "2026-03-02T18:02:47.990000Z",
  "file_hash": "008b57bbde9d64bd0a3c4ec79c32914c6a02f08f128bc5c9574de5de2afe0e0d",
  "private": false,
  "record": {
    "abstract": "We present a setup for quantum cryptography based on photon pairs in\nenergy-time Bell states and show its feasability in a laboratory experiment.\nOur scheme combines the advantages of using photon pairs instead of faint laser\npulses and the possibility to preserve energy-time entanglement over long\ndistances. Moreover, using 4-dimensional energy-time states, no fast random\nchange of bases is required in our setup : Nature itself decides whether to\nmeasure in the energy or in the time base.",
    "arxiv_id": "quant-ph/9911109",
    "authors": [
      "W. Tittel",
      "J. Brendel",
      "H. Zbinden",
      "N. Gisin"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.84.4737",
    "title": "Quantum Cryptography using entangled photons in energy-time Bell states",
    "url": "https://arxiv.org/abs/quant-ph/9911109"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0e8fd004-cca7-4136-9f8f-aad599a87999",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}