{
  "id": "0901.0158",
  "version": "v2",
  "published": "2009-01-01T02:58:24.000Z",
  "updated": "2009-06-23T02:26:20.000Z",
  "title": "Exact results for the criticality of quench dynamics in quantum Ising models",
  "authors": [
    "Ying Li",
    "M. X. Huo",
    "Z. Song"
  ],
  "comment": "5 pages, 3 figures",
  "journal": "Phys. Rev. B 80, 054404 (2009)",
  "doi": "10.1103/PhysRevB.80.054404",
  "categories": [
    "cond-mat.stat-mech",
    "quant-ph"
  ],
  "abstract": "Based on the obtained exact results we systematically study the quench dynamics of a one-dimensional spin-1/2 transverse field Ising model with zero- and finite-temperature initial states. We focus on the magnetization of the system after a sudden change of the external field and a coherent time-evolution process. With a zero-temperature initial state, the quench magnetic susceptibility as a function of the initial field strength exhibits strongly similar scaling behaviors to those of the static magnetic susceptibility, and the quench magnetic susceptibility as a function of the final field strength shows a discontinuity at the quantum critical point. This discontinuity remains robust and always occurs at the quantum critical point even for the case of finite-temperature initial systems, which indicates a great advantage of employing quench dynamics to study quantum phase transitions.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-06-23T02:26:20.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "64.70.Tg",
      "05.70.Jk",
      "75.10.Jm"
    ],
    "keywords": [
      "quench dynamics",
      "quantum ising models",
      "exact results",
      "quench magnetic susceptibility",
      "quantum critical point"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2009,
      "month": "Aug",
      "volume": 80,
      "number": 5,
      "pages": "054404"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvB..80e4404L"
    }
  }
}