{
  "annotation_id": "4e28ad49-6dfe-409d-a6e3-66f25ec7b687",
  "date_created": "2026-03-02T18:02:16.279000Z",
  "date_modified": "2026-03-02T18:02:16.279000Z",
  "file_hash": "2e54a111cce9022c70ded026f379bb63d29262031d6347a12f2fea46cf9ef12d",
  "private": false,
  "record": {
    "abstract": "We derive optimal schemes for preparation and estimation of relational\ndegrees of freedom between two quantum systems. We specifically analyze the\ncase of rotation parameters representing relative angles between elements of\nthe SU(2) symmetry group. Our estimation procedure does not assume prior\nknowledge of the absolute spatial orientation of the systems and as such does\nnot require information on the underlying classical reference frame in which\nthe states are prepared.",
    "arxiv_id": "quant-ph/0506223",
    "authors": [
      "Netanel H. Lindner",
      "Petra F. Scudo",
      "Dagmar Bruss"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Int. J. Quant. Info. 4, 131 (2006)",
    "title": "Quantum estimation of relative information",
    "url": "https://arxiv.org/abs/quant-ph/0506223"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ee55be9d-30c0-4b99-9f1d-b036a0d11e7e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}