{
  "annotation_id": "85f30d40-b5ea-4ff9-adc8-c47f7e27ad26",
  "date_created": "2026-03-02T18:02:06.394000Z",
  "date_modified": "2026-03-02T18:02:06.394000Z",
  "file_hash": "65adbbbf013a65f3f1662e3b1df55c43845aec76d524d5c367bbb3c8a67b1d7c",
  "private": false,
  "record": {
    "abstract": "Off-diagonal geometric phases have been developed in order to provide\ninformation of the geometry of paths that connect noninterfering quantal\nstates. We propose a kinematic approach to off-diagonal geometric phases for\npure and mixed states. We further extend the mixed state concept proposed in\n[Phys. Rev. Lett. {\\bf 90}, 050403 (2003)] to degenerate density operators. The\nfirst and second order off-diagonal geometric phases are analyzed for unitarily\nevolving pairs of pseudopure states.",
    "arxiv_id": "quant-ph/0405048",
    "authors": [
      "D. M. Tong",
      "Erik Sj\u00f6qvist",
      "Stefan Filipp",
      "L. C. Kwek",
      "C. H. Oh"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.71.032106",
    "journal_ref": "Phys. Rev. A 71, 032106 (2005)",
    "title": "Kinematic approach to off-diagonal geometric phases of nondegenerate and   degenerate mixed states",
    "url": "https://arxiv.org/abs/quant-ph/0405048"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8495f12d-c4cc-45f0-9e28-9334e1389ea9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}