{
  "annotation_id": "dcd20e81-3ba3-4301-ada1-37f0d986d153",
  "date_created": "2026-03-02T18:02:34.309000Z",
  "date_modified": "2026-03-02T18:02:34.309000Z",
  "file_hash": "659b82cd14380fdda6e55434b433704d8a211538c098822b55b9239d0753e551",
  "private": false,
  "record": {
    "abstract": "A simple and efficient quantum non-demolition measurement (QND) scheme is\nproposed in which the arrival of a signal photon is detected without affecting\nthe qubit state. The proposed QND scheme functions even if the ancillary photon\nis replaced with weak light composed of vacuum and one-photon states. Although\nthe detection scheme is designed for entanglement sharing applications, it is\nalso suitable for general purification of a single photon state.",
    "arxiv_id": "quant-ph/0702138",
    "authors": [
      "Kunihiro Kojima",
      "Akihisa Tomita"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Phys. Rev. A 75, 032320 (2007)",
    "title": "Quantum non-demolition measurement of photon-arrival using an   atom-cavity system",
    "url": "https://arxiv.org/abs/quant-ph/0702138"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "68db12f2-c31f-4176-9af3-554f00f8eb58",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}