{
  "annotation_id": "f5ee8a5c-64f4-4479-8816-9fee729ef466",
  "date_created": "2026-03-02T18:02:44.914000Z",
  "date_modified": "2026-03-02T18:02:44.914000Z",
  "file_hash": "6584328c41288af981a7dfe442c4d36a467c7265df61f84c37c9bde9d488e4d3",
  "private": false,
  "record": {
    "abstract": "We consider how the conventional spectroscopic and interferometric schemes\ncan be rearranged to serve for reconstructing quantum states of physical\nsystems possessing SU(2) symmetry. The discussed systems include a collection\nof two-level atoms, a two-mode quantized radiation field with a fixed total\nnumber of photons, and a single laser-cooled ion in a two-dimensional harmonic\ntrap with a fixed total number of vibrational quanta. In the proposed\nrearrangement, the standard spectroscopic and interferometric experiments are\ninverted. Usually one measures an unknown frequency or phase shift using a\nsystem prepared in a known quantum state. Our aim is just the inverse one,\ni.e., to use a well-calibrated apparatus with known transformation parameters\nto measure unknown quantum states.",
    "arxiv_id": "quant-ph/9904054",
    "authors": [
      "C. Brif",
      "A. Mann"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1464-4266/2/3/305",
    "journal_ref": "J.Opt.B Quant.Semiclass.Opt. 2 (2000) 245-251",
    "title": "Inverted spectroscopy and interferometry for quantum-state   reconstruction of systems with SU(2) symmetry",
    "url": "https://arxiv.org/abs/quant-ph/9904054"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8fd6ac47-2123-497d-8dbd-1ed382e49c26",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}