{
  "annotation_id": "ba7bf9f1-8867-4639-bcfa-8054c0d3b9ab",
  "date_created": "2026-03-02T18:02:03.351000Z",
  "date_modified": "2026-03-02T18:02:03.351000Z",
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  "record": {
    "abstract": "We show that the density matrix of a spin-l system can be described entirely\nin terms of the measurement statistics of projective spin measurements along a\nminimum of 4l+1 different spin directions. It is thus possible to represent the\ncomplete quantum statistics of any N-level system within the spherically\nsymmetric three dimensional space defined by the spin vector. An explicit\nmethod for reconstructing the density matrix of a spin-1 system from the\nmeasurement statistics of five non-orthogonal spin directions is presented and\nthe generalization to spin-l systems is discussed.",
    "arxiv_id": "quant-ph/0310003",
    "authors": [
      "Holger F. Hofmann",
      "Shigeki Takeuchi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.042108",
    "journal_ref": "Phys. Rev. A 69, 042108 (2004)",
    "title": "Quantum-state tomography for spin-l systems",
    "url": "https://arxiv.org/abs/quant-ph/0310003"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5bff65a8-67f2-4eb1-8246-e126e491c595",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}