{
  "annotation_id": "130bece6-bd9a-44e9-81c7-4f1370fd2fa3",
  "date_created": "2026-03-02T18:02:27.297000Z",
  "date_modified": "2026-03-02T18:02:27.297000Z",
  "file_hash": "c809a5c11e2dfdb42dca996307a0aacf0b8ee15b1a37daba561b02d9a5b50587",
  "private": false,
  "record": {
    "abstract": "We analyze the problem of increasing the efficiency of single-photon sources\nor single-rail photonic qubits via linear optical processing and destructive\nconditional measurements. In contrast to previous work we allow for the use of\ncoherent states and do not limit to photon-counting measurements. We conjecture\nthat it is not possible to increase the efficiency, prove this conjecture for\nseveral important special cases, and provide extensive numerical results for\nthe general case.",
    "arxiv_id": "quant-ph/0605043",
    "authors": [
      "Dominic W. Berry",
      "A. I. Lvovsky",
      "Barry C. Sanders"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/JOSAB.24.000189",
    "journal_ref": "Journal of the Optical Society of America B 24, 189 (2007)",
    "title": "Efficiency limits for linear optical processing of single photons and   single-rail qubits",
    "url": "https://arxiv.org/abs/quant-ph/0605043"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b750fe92-96c9-4e53-b6ce-9d7cbf293eb0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}