{
  "annotation_id": "61c19a1e-5974-42b3-82b5-4e17bba401f4",
  "date_created": "2026-03-02T18:01:38.978000Z",
  "date_modified": "2026-03-02T18:01:38.978000Z",
  "file_hash": "ec91159bca838cbb4691c31534f61924728c32b1eb1e1c53b53e42c551bf501c",
  "private": false,
  "record": {
    "abstract": "We report an experimental quantum key distribution that utilizes balanced\nhomodyne detection, instead of photon counting, to detect weak pulses of\ncoherent light. Although our scheme inherently has a finite error rate, it\nallows high-efficiency detection and quantum state measurement of the\ntransmitted light using only conventional devices at room temperature. When the\naverage photon number was 0.1, an error rate of 0.08 and \"effective\" quantum\nefficiency of 0.76 were obtained.",
    "arxiv_id": "quant-ph/0008037",
    "authors": [
      "T. Hirano",
      "T. Konishi",
      "R. Namiki"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.042331",
    "journal_ref": "Phys. Rev. A 68, 042331 (2003)",
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "Quantum cryptography using balanced homodyne detection",
    "url": "https://arxiv.org/abs/quant-ph/0008037"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4a247914-9c07-4636-afe5-2032c15f32ce",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}