{
  "id": "0707.0601",
  "version": "v2",
  "published": "2007-07-04T12:57:24.000Z",
  "updated": "2008-04-09T19:21:51.000Z",
  "title": "Diffusion in an Expanding Plasma using AdS/CFT",
  "authors": [
    "Keun-Young Kim",
    "Sang-Jin Sin",
    "Ismail Zahed"
  ],
  "comment": "19 pages, 2 figures, minor corrections, version to appear in JHEP",
  "journal": "JHEP0804:047,2008",
  "doi": "10.1088/1126-6708/2008/04/047",
  "categories": [
    "hep-th",
    "hep-ph"
  ],
  "abstract": "We consider the diffusion of a non-relativistic heavy quark of fixed mass M, in a one-dimensionally expanding and strongly coupled plasma using the AdS/CFT duality. The Green's function constructed around a static string embedded in a background with a moving horizon, is identified with the noise correlation function in a Langevin approach. The (electric) noise decorrelation is of order 1/T(\\tau) while the velocity de-correlation is of order MD(\\tau)/T(\\tau). For MD>1, the diffusion regime is segregated and the energy loss is Langevin-like. The time dependent diffusion constant D(\\tau) asymptotes its adiabatic limit 2/\\pi\\sqrt{\\lambda} T(\\tau) when \\tau/\\tau_0=(1/3\\eta_0\\tau_0)^3 where \\eta_0 is the drag coefficient at the initial proper time \\tau_0.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-04-09T19:21:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "expanding plasma",
      "time dependent diffusion constant",
      "initial proper time",
      "noise correlation function",
      "non-relativistic heavy quark"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "IOP",
      "journal": "Journal of High Energy Physics",
      "year": 2008,
      "month": "Apr",
      "volume": 2008,
      "number": 4,
      "pages": "047"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008JHEP...04..047K",
      "inspire": 755011
    }
  }
}