{
  "annotation_id": "36a2edde-19b5-4313-87f9-6965c564aada",
  "date_created": "2026-03-02T18:01:52.977000Z",
  "date_modified": "2026-03-02T18:01:52.977000Z",
  "file_hash": "9bb081b7fba75058f9ad16e7d437035f005afa7e9b94a8f7afb5d79ae274d2a7",
  "private": false,
  "record": {
    "abstract": "Most methods for experimentally reconstructing the quantum state of light\ninvolve determining a quasiprobability distribution such as the Wigner\nfunction. In this paper we present a scheme for measuring individual density\nmatrix elements in the photon number state representation. Remarkably, the\nscheme is simple, involving two beam splitters and a reference field in a\ncoherent state.",
    "arxiv_id": "quant-ph/0209132",
    "authors": [
      "K. L. Pregnell",
      "D. T. Pegg"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.66.013810",
    "journal_ref": "Phys. Rev. A 66, 013810 (2002)",
    "title": "Measuring the elements of the optical density matrix",
    "url": "https://arxiv.org/abs/quant-ph/0209132"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2187d0d0-b96e-4722-8904-9ac473bd4ae0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}