{
  "id": "1312.6938",
  "version": "v1",
  "published": "2013-12-25T07:35:02.000Z",
  "updated": "2013-12-25T07:35:02.000Z",
  "title": "Superradiance transition in a system with a single qubit and a single oscillator",
  "authors": [
    "S. Ashhab"
  ],
  "comment": "7 pages (two-column), 7 figures",
  "journal": "Phys. Rev. A 87, 013826 (2013)",
  "doi": "10.1103/PhysRevA.87.013826",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We consider the phase-transition-like behaviour in the Rabi model containing a single two-level system, or qubit, and a single harmonic oscillator. The system experiences a sudden transition from an uncorrelated state to an increasingly correlated one as the qubit-oscillator coupling strength is varied and increased past a critical point. This singular behaviour occurs in the limit where the oscillator's frequency is much lower than the qubit's frequency; away from this limit one obtains a finite-width transition region. By analyzing the energy-level structure, the value of the oscillator field and its squeezing and the qubit-oscillator correlation, we gain insight into the nature of the transition and the associated critical behaviour.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-12-25T07:35:02.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "42.50.Nn",
      "64.70.Tg",
      "42.50.Pq"
    ],
    "keywords": [
      "single qubit",
      "single oscillator",
      "superradiance transition",
      "single harmonic oscillator",
      "finite-width transition region"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2013,
      "month": "Jan",
      "volume": 87,
      "number": 1,
      "pages": "013826"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvA..87a3826A"
    }
  }
}