{
  "annotation_id": "4dd1c2c0-db3c-4888-963b-2e3ea78fbcb1",
  "date_created": "2026-03-02T18:01:52.160000Z",
  "date_modified": "2026-03-02T18:01:52.160000Z",
  "file_hash": "11209bbcddb726f49bd514a01eda1477049d41d8384db2a5cc766416ef8c2f64",
  "private": false,
  "record": {
    "abstract": "We extend the off-diagonal geometric phase [Phys. Rev. Lett. {\\bf 85}, 3067\n(2000)] to mixed quantal states. The nodal structure of this phase in the qubit\n(two-level) case is compared with that of the diagonal mixed state geometric\nphase [Phys. Rev. Lett. {\\bf 85}, 2845 (2000)]. Extension to higher dimensional\nHilbert spaces is delineated. A physical scenario for the off-diagonal mixed\nstate geometric phase in polarization-entangled two-photon interferometry is\nproposed.",
    "arxiv_id": "quant-ph/0209087",
    "authors": [
      "Stefan Filipp",
      "Erik Sj\u00f6qvist"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.90.050403",
    "journal_ref": "Phys. Rev. Lett. 90, 050403 (2003)",
    "title": "Off-diagonal geometric phase for mixed states",
    "url": "https://arxiv.org/abs/quant-ph/0209087"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0ea4c87a-62d4-4c7c-87ed-8935b855d2d2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}