{
  "annotation_id": "6785852e-d9d1-4e9f-96a3-ce5e81aa6490",
  "date_created": "2026-03-02T18:02:23.781000Z",
  "date_modified": "2026-03-02T18:02:23.781000Z",
  "file_hash": "e65f33c68c112d44d58142a1abe80b4a551d7827eb4e5565f77e0a6cea823534",
  "private": false,
  "record": {
    "abstract": "A measurement process is constructed to project an arbitrary two-mode\n$N$-photon state to a maximally entangled $N$-photon state (the {\\it\nNOON}-state). The result of this projection measurement shows a typical\ninterference fringe with an $N$-photon de Broglie wavelength. For an\nexperimental demonstration, this measurement process is applied to a\nfour-photon superposition state from two perpendicularly oriented type-I\nparametric down-conversion processes. Generalization to arbitrary $N$-photon\nstates projection measurement can be easily made and may have wide applications\nin quantum information. As an example, we formulate it for precision phase\nmeasurement.",
    "arxiv_id": "quant-ph/0512212",
    "authors": [
      "F. W. Sun",
      "B. H. Liu",
      "Y. F. Huang",
      "Z. Y. Ou",
      "G. C. Guo"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.033812",
    "title": "Observation of Four-Photon de Broglie Wavelength by State Projection   Measurement",
    "url": "https://arxiv.org/abs/quant-ph/0512212"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9ee25dd6-fd94-4b18-b44e-0b997a5c3b4d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}