{
  "annotation_id": "7c19c96c-7220-4380-8fd2-a6b4151f0fbf",
  "date_created": "2026-03-02T18:02:37.231000Z",
  "date_modified": "2026-03-02T18:02:37.231000Z",
  "file_hash": "574cc7425a0b14fe8658d63fbaca97eef6873e1d0449c329e41c2beb1f6a3b08",
  "private": false,
  "record": {
    "abstract": "Many manifestly non-Hermitian Hamiltonians (typically, PT-symmetric complex\nanharmonic oscillators) possess a strictly real, \"physical\" bound-state\nspectrum. This means that they are (quasi-)Hermitian with respect to a suitable\nnon-standard metric. The domain D of the existence of this metric is studied\nhere for a nontrivial though still non-numerical four-parametric \"benchmark\"\nmatrix model.",
    "arxiv_id": "quant-ph/0703168",
    "authors": [
      "Miloslav Znojil"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/j.physleta.2007.03.010",
    "journal_ref": "Physics Letters A 367 (2007) 300-306",
    "title": "Determination of the domain of the admissible matrix elements in the   four-dimensional PT-symmetric anharmonic model",
    "url": "https://arxiv.org/abs/quant-ph/0703168"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e7a60a0c-51fb-4916-bd7b-45f603a4e2cf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}