{
  "annotation_id": "7aced5a4-d950-4719-a059-c2e1423b9927",
  "date_created": "2026-03-02T18:02:44.484000Z",
  "date_modified": "2026-03-02T18:02:44.484000Z",
  "file_hash": "3d7a27cf104c39f21cbe8133e62695bfa5d78c79f69b29302cfaf9e1585d9851",
  "private": false,
  "record": {
    "abstract": "Avoided level crossings are associated with exceptional points which are the\nsingularities of the spectrum and eigenfunctions, when they are considered as\nfunctions of a coupling parameter. It is shown that the wave function of {\\it\none} state changes sign but not the other, if the exceptional point is\nencircled in the complex plane. An experimental setup is suggested where this\npeculiar phase change could be observed.",
    "arxiv_id": "quant-ph/9901023",
    "authors": [
      "W. D. Heiss"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1007/s100530050339",
    "title": "Phases of Wave Functions and Level Repulsion",
    "url": "https://arxiv.org/abs/quant-ph/9901023"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "93f90ed0-2182-4202-94db-bc9ac37cd3fa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}