{
  "annotation_id": "f93b925d-b8d6-4311-8542-ada40d097e12",
  "date_created": "2026-03-02T18:02:03.427000Z",
  "date_modified": "2026-03-02T18:02:03.427000Z",
  "file_hash": "cbc47e9f81569a35c53c297feea7d0be34b39b24b8a13284acdf2939f25a1dd4",
  "private": false,
  "record": {
    "abstract": "Measuring the polarisation of a single photon typically results in its\ndestruction. We propose, demonstrate, and completely characterise a\n\\emph{quantum non-demolition} (QND) scheme for realising such a measurement\nnon-destructively. This scheme uses only linear optics and photo-detection of\nancillary modes to induce a strong non-linearity at the single photon level,\nnon-deterministically. We vary this QND measurement continuously into the weak\nregime, and use it to perform a non-destructive test of complementarity in\nquantum mechanics. Our scheme realises the most advanced general measurement of\na qubit: it is non-destructive, can be made in any basis, and with arbitrary\nstrength.",
    "arxiv_id": "quant-ph/0312048",
    "authors": [
      "G. J. Pryde",
      "J. L. O\u0027Brien",
      "A. G. White",
      "S. D. Bartlett",
      "T. C. Ralph"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.92.190402",
    "journal_ref": "Phys.Rev.Lett.92:190402,2004",
    "title": "Measuring a photonic qubit without destroying it",
    "url": "https://arxiv.org/abs/quant-ph/0312048"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9b429a8f-7a55-4646-9026-f92d9a1d373b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}