{
  "annotation_id": "99697612-1e62-4e7c-b118-f4055b9e7683",
  "date_created": "2026-03-02T18:02:20.777000Z",
  "date_modified": "2026-03-02T18:02:20.777000Z",
  "file_hash": "a0042c22267de622e95380c2a7bff9a1a9ff20f5e39369e278f23a9bc187244e",
  "private": false,
  "record": {
    "abstract": "The expression for the density operator of the damped harmonic oscillator is\nderived from the master equation in the framework of the Lindblad theory for\nopen quantum systems. Then the von Neumann entropy and effective temperature of\nthe system are obtained. The entropy for a state characterized by a Wigner\ndistribution function which is Gaussian in form is found to depend only on the\nvariance of the distribution function.",
    "arxiv_id": "quant-ph/0508141",
    "authors": [
      "A. Isar"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Helv. Phys. Acta 68 (1995) 225-234",
    "title": "Density operator and entropy of the damped quantum harmonic oscillator",
    "url": "https://arxiv.org/abs/quant-ph/0508141"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b3d8088b-67bd-4a0e-8a36-11436126a1d3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}