{
  "annotation_id": "701c940a-8b7e-489f-a783-81d8b307d514",
  "date_created": "2026-03-02T18:02:48.410000Z",
  "date_modified": "2026-03-02T18:02:48.410000Z",
  "file_hash": "3f6d813643baa027b01e3f59060dc69739d4a115e90880bdf844344919083eb3",
  "private": false,
  "record": {
    "abstract": "We suggest a method to prepare any chosen superposition a0 |0\u003e + a1 |1\u003e of\nthe vacuum and one-photon states. The method is based on a conditional\ndouble-interferometer fed by an one-photon state and a coherent state. The\nscheme involves only linear optical elements and avalanche photodetectors, and\ntherefore it should be realizable with current technology. A realistic\ndescription of the triggering photodetectors is employed, i.e. we assume that\nthey can only check, with a certain efficiency, whether or not any photon is\npresent. We discuss two working regimes, and show that output states with\nfidelity arbitrarily close to unit may be obtained, with non vanishing\nconditional probability, also for low quantum efficiency at the photodetectors.",
    "arxiv_id": "quant-ph/9909075",
    "authors": [
      "Matteo G A Paris"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.62.033813",
    "journal_ref": "Phys. Rev. A. vol 62, 033813 (2000)",
    "title": "Optical qubit by conditional interferometry",
    "url": "https://arxiv.org/abs/quant-ph/9909075"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fcf26e00-2dfa-4c8c-8c30-8b917e9e8421",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}