{
  "annotation_id": "09939eab-00ce-4a73-8f49-afef996c0812",
  "date_created": "2026-03-02T18:01:46.180000Z",
  "date_modified": "2026-03-02T18:01:46.180000Z",
  "file_hash": "94f2d21be3debd7a38a189113ced971a33141b4a74fb25114af08da8ca052b70",
  "private": false,
  "record": {
    "abstract": "We evaluate perturbatively the density matrix in the low-temperature limit\nand thus the ground-state wave function of the anharmonic oscillator up to\nsecond order in the coupling constant. We then employ Kleinert\u0027s variational\nperturbation theory to determine the ground-state wave function for all\ncoupling strengths.",
    "arxiv_id": "quant-ph/0105095",
    "authors": [
      "Axel Pelster",
      "Florian Weissbach"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1142/9789812811240_0028",
    "title": "Variational Perturbation Theory for the Ground-State Wave Function",
    "url": "https://arxiv.org/abs/quant-ph/0105095"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "01e41d4d-be77-498e-b47a-117dc16819d2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}