{
  "annotation_id": "6b61eaef-4fb5-4c35-8fa3-32966d4be3d4",
  "date_created": "2026-03-02T18:02:20.597000Z",
  "date_modified": "2026-03-02T18:02:20.597000Z",
  "file_hash": "f476880bcd29e71c5dbf7054ff99763c235e53214c4a06cf4808e8de187575f4",
  "private": false,
  "record": {
    "abstract": "We propose and demonstrate a quantum key distribution scheme in higher-order\n$d$-dimensional alphabets using spatial degrees of freedom of photons. Our\nimplementation allows for the transmission of 4.56 bits per sifted photon,\nwhile providing improved security: an intercept-resend attack on all photons\nwould induce an error rate of 0.47. Using our system, it should be possible to\nsend more than a byte of information per sifted photon.",
    "arxiv_id": "quant-ph/0510088",
    "authors": [
      "S. P. Walborn",
      "D. S. Lemelle",
      "M. P. Almeida",
      "P. H. Souto Ribeiro"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.96.090501",
    "journal_ref": "Physical Review Letters, 96, 090501 (2006)",
    "title": "Quantum key distribution with higher-order alphabets using   spatially-encoded qudits",
    "url": "https://arxiv.org/abs/quant-ph/0510088"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1051f52c-68d2-4844-ad5f-6c05b473551d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}