{
  "annotation_id": "65fa2d99-bdcd-4f7f-8b26-f0ab166330f8",
  "date_created": "2026-03-02T18:02:20.212000Z",
  "date_modified": "2026-03-02T18:02:20.212000Z",
  "file_hash": "50d949503025ceefff0dd32324cf96082580ca3f1ffebec257128732b9783e50",
  "private": false,
  "record": {
    "abstract": "We demonstrate experimentally that it is possible to prepare and detect\nphoton pairs created by spontaneous parametric down-conversion which exhibit\nsimultaneous position-momentum and polarization correlations that are adequate\nto implement a four-dimensional key distribution protocol.",
    "arxiv_id": "quant-ph/0510087",
    "authors": [
      "M. P. Almeida",
      "S. P. Walborn",
      "P. H. Souto Ribeiro"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Four-dimensional Quantum Key Distribution using Position-Momentum and   Polarization Correlations",
    "url": "https://arxiv.org/abs/quant-ph/0510087"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "438d194d-e7a3-4f65-921c-c1f647766b1c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}