{
  "annotation_id": "4b2f074e-eece-4794-aa7b-eead5a823de0",
  "date_created": "2026-03-02T18:01:44.793000Z",
  "date_modified": "2026-03-02T18:01:44.793000Z",
  "file_hash": "5642a8df4664ff77b91476fb3be66515b1eb52be3e320a3560b517c5af150fc6",
  "private": false,
  "record": {
    "abstract": "We present a simple method to deal with caustics in the semiclassical\napproximation to the thermal density matrix of a particle moving on the line.\nFor simplicity, only its diagonal elements are considered. The only ingredient\nwe require is the knowledge of the extrema of the Euclidean action. The\nprocedure makes use of complex trajectories, and is applied to the quartic\ndouble-well potential.",
    "arxiv_id": "quant-ph/0105076",
    "authors": [
      "C. A. A. de Carvalho",
      "R. M. Cavalcanti",
      "E. S. Fraga",
      "S. E. Joras"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.stat-mech",
      "hep-ph",
      "hep-th"
    ],
    "doi": "10.1103/PhysRevE.65.056112",
    "journal_ref": "Phys.Rev. E65 (2002) 056112",
    "title": "Improved semiclassical density matrix: taming caustics",
    "url": "https://arxiv.org/abs/quant-ph/0105076"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2dae853f-966d-4281-a2e2-163c8d4ca3df",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}