{
  "annotation_id": "a165605f-780f-4b88-b726-621d86b79fcb",
  "date_created": "2026-03-02T18:02:03.595000Z",
  "date_modified": "2026-03-02T18:02:03.595000Z",
  "file_hash": "3c684c478763a941e84f4ab9187715de05ef6333a84474060dd9e01bbf41cae8",
  "private": false,
  "record": {
    "abstract": "We describe an experiment in which a physical qubit represented by the\npolarization state of a single-photon was probabilistically encoded in the\nlogical state of two photons. The experiment relied on linear optics,\npost-selection, and three-photon interference effects produced by a parametric\ndown-conversion photon pair and a weak coherent state. An interesting\nconsequence of the encoding operation was the ability to observe entangled\nthree-photon Greenberger-Horne-Zeilinger states.",
    "arxiv_id": "quant-ph/0312097",
    "authors": [
      "T. B. Pittman",
      "B. C Jacobs",
      "J. D. Franson"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.042306",
    "journal_ref": "Phys. Rev. A 69, 042306 (2004)",
    "title": "Probabilistic Quantum Encoder for Single-Photon Qubits",
    "url": "https://arxiv.org/abs/quant-ph/0312097"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ddcc2677-674f-4af4-9169-07b7a0f7ba65",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}