{
  "annotation_id": "126b13ad-9cbe-4eb5-a0ec-5d3033dc952d",
  "date_created": "2026-03-02T18:02:44.975000Z",
  "date_modified": "2026-03-02T18:02:44.975000Z",
  "file_hash": "369c8f8a223257863b3dc457ada9e28cc1cac93cc789b750204319be0603ce82",
  "private": false,
  "record": {
    "abstract": "We develop convergent variational perturbation theory for quantum statistical\ndensity matrices. The theory is applicable to polynomial as well as\nnonpolynomial interactions. Illustrating the power of the theory, we calculate\nthe temperature-dependent density of a particle in a double-well and of the\nelectron in a hydrogen atom.",
    "arxiv_id": "quant-ph/9812063",
    "authors": [
      "M. Bachmann",
      "H. Kleinert",
      "A. Pelster"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.60.3429",
    "title": "Variational Perturbation Theory for Density Matrices",
    "url": "https://arxiv.org/abs/quant-ph/9812063"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "dde1cdd0-1261-4f9f-a928-8fdb0173b640",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}