{
  "annotation_id": "737f39b7-10e0-4cc3-b835-159d0e915199",
  "date_created": "2026-03-02T18:00:15.559000Z",
  "date_modified": "2026-03-02T18:00:15.559000Z",
  "file_hash": "a9df73135025b7f745699a5543ebe5241fbbeefcfd87d4c3cc7dff00be1b50ce",
  "private": false,
  "record": {
    "abstract": "It is argued that, if a regular Hamiltonian is perturbed by a term that\nproduces chaos, the onset of chaos is shifted towards larger values of the\nperturbation parameter if the unperturbed spectrum is degenerate and the\nlifting of the degeneracy is of second order in this parameter. The argument is\nbased on the behaviour of the exceptional points of the full problem.",
    "arxiv_id": "nucl-th/9507018",
    "authors": [
      "W. Dieter Heiss",
      "Stefanel Radu"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevE.52.4762",
    "title": "Quantum Chaos, Degeneracies and Exceptional Points",
    "url": "https://arxiv.org/abs/nucl-th/9507018"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a37a3547-4570-4a0f-9c82-6977ebf5915a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}