{
  "id": "quant-ph/0108082",
  "version": "v1",
  "published": "2001-08-17T13:38:31.000Z",
  "updated": "2001-08-17T13:38:31.000Z",
  "title": "Measuring irreversible dynamics of a quantum harmonic oscillator",
  "authors": [
    "Giovanna Morigi",
    "Enrique Solano",
    "Berthold-Georg Englert",
    "Herbert Walther"
  ],
  "comment": "4 pages, 2 figures; submitted to Physical Review A as a Rapid Communication",
  "journal": "Physical Review A, vol. 65, 2002, art. no. 040102(R) (4 pages)",
  "doi": "10.1103/PhysRevA.65.040102",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We show that the unitary evolution of a harmonic oscillator coupled to a two-level system can be undone by a suitable manipulation of the two-level system -- more specifically: by a quasi-instantaneous phase change. This enables us to isolate the dissipative evolution to which the oscillator may be exposed in addition. With this method we study the decoherence of a photon mode in cavity QED, and that of the quantized harmonic motion of trapped ions. We comment on the relation to spin echoes and multi-path interferometry.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-08-17T13:38:31.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum harmonic oscillator",
      "measuring irreversible dynamics",
      "two-level system",
      "quasi-instantaneous phase change",
      "unitary evolution"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}