{
  "id": "1212.5864",
  "version": "v2",
  "published": "2012-12-24T04:52:36.000Z",
  "updated": "2013-01-02T02:00:57.000Z",
  "title": "Vacuum Rabi oscillation induced by virtual photons in the ultrastrong coupling regime",
  "authors": [
    "C. K. Law"
  ],
  "comment": "4 pages, 3 figures",
  "doi": "10.1103/PhysRevA.87.045804",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We present an interaction scheme that exhibits a dynamical consequence of virtual photons carried by a vacuum-field dressed two-level atom in the ultrastrong coupling regime. We show that, with the aid of an external driving field, virtual photons provide a transition matrix element that enables the atom to evolve coherently and reversibly to an auxiliary level accompanied by the emission of a real photon. The process corresponds to a type of vacuum Rabi oscillation, and we show that the effective vacuum Rabi frequency is proportional to the amplitude of a single virtual photon in the ground state. Therefore the interaction scheme could serve as a probe of ground state structures in the ultrastrong coupling regime.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-01-02T02:00:57.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "42.50.Pq",
      "42.50.Ct",
      "42.50.Lc"
    ],
    "keywords": [
      "ultrastrong coupling regime",
      "vacuum rabi oscillation",
      "interaction scheme",
      "single virtual photon",
      "effective vacuum rabi frequency"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2013,
      "month": "Apr",
      "volume": 87,
      "number": 4,
      "pages": "045804"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvA..87d5804L"
    }
  }
}