{
  "annotation_id": "b37cc598-2608-4898-b1e4-60f5dd9e2069",
  "date_created": "2026-03-02T18:02:38.189000Z",
  "date_modified": "2026-03-02T18:02:38.189000Z",
  "file_hash": "5381231eb155b73edd7e5c95f60f3df62b4c475139458edaba439f23aa2235e0",
  "private": false,
  "record": {
    "abstract": "Variational perturbation expansions have recently been used to calculate\ndirectly the strong-coupling expansion coefficients of the anharmonic\noscillator. The convergence is exponentially fast with superimposed\noscillations, as recently observed empirically by the authors. In this note,\nthe observed behavior is explained and used to determine accurately the\nmagnitude and phase of the leading Bender-Wu singularity which is responsible\nfor the finite convergence radius in the complex coupling constant plane.",
    "arxiv_id": "quant-ph/9509005",
    "authors": [
      "H. Kleinert",
      "W. Janke"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/0375-9601(95)00521-4",
    "journal_ref": "Phys. Lett. A206 (1995) 283",
    "title": "Convergence behavior of variational perturbation expansion-- A method   for locating Bender-Wu singularities",
    "url": "https://arxiv.org/abs/quant-ph/9509005"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "68a17f86-4069-4f30-ae38-9f405957022e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}