{
  "annotation_id": "b961ba93-84cf-4d71-bb44-2910c44964ad",
  "date_created": "2026-03-02T18:01:45.893000Z",
  "date_modified": "2026-03-02T18:01:45.893000Z",
  "file_hash": "ee974a1e81d7efbcb0bf14abfcdf180a3fa11daad9e76d386d767afeb23124b1",
  "private": false,
  "record": {
    "abstract": "We show that the unitary evolution of a harmonic oscillator coupled to a\ntwo-level system can be undone by a suitable manipulation of the two-level\nsystem -- more specifically: by a quasi-instantaneous phase change. This\nenables us to isolate the dissipative evolution to which the oscillator may be\nexposed in addition. With this method we study the decoherence of a photon mode\nin cavity QED, and that of the quantized harmonic motion of trapped ions. We\ncomment on the relation to spin echoes and multi-path interferometry.",
    "arxiv_id": "quant-ph/0108082",
    "authors": [
      "Giovanna Morigi",
      "Enrique Solano",
      "Berthold-Georg Englert",
      "Herbert Walther"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.65.040102",
    "journal_ref": "Physical Review A, vol. 65, 2002, art. no. 040102(R) (4 pages)",
    "title": "Measuring irreversible dynamics of a quantum harmonic oscillator",
    "url": "https://arxiv.org/abs/quant-ph/0108082"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ca0a839f-a83c-4f65-a8f8-5e150648dd3d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}