{
  "id": "1803.07479",
  "version": "v1",
  "published": "2018-03-20T15:16:15.000Z",
  "updated": "2018-03-20T15:16:15.000Z",
  "title": "Hydrodynamical phase transition for domain-wall melting in the XY chain",
  "authors": [
    "Viktor Eisler",
    "Florian Maislinger"
  ],
  "comment": "8 pages, 4 figures",
  "categories": [
    "cond-mat.stat-mech",
    "quant-ph"
  ],
  "abstract": "We study the melting of a domain wall, prepared as a certain low-energy excitation above the ferromagnetic ground state of the XY chain. In a well defined parameter regime the time-evolved magnetization profile develops sharp kink-like structures in the bulk, showing features of a phase transition in the hydrodynamic scaling limit. The transition is of purely dynamical nature and can be attributed to the appearance of a negative effective mass term in the dispersion. The signatures are also clearly visible in the entanglement profile measured along the front region, which can be obtained by covariance-matrix methods despite the state being non-Gaussian.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-03-20T15:16:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hydrodynamical phase transition",
      "xy chain",
      "domain-wall melting",
      "covariance-matrix methods despite",
      "ferromagnetic ground state"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}