{
  "id": "0806.3796",
  "version": "v1",
  "published": "2008-06-24T01:17:01.000Z",
  "updated": "2008-06-24T01:17:01.000Z",
  "title": "Zero Sound from Holography",
  "authors": [
    "A. Karch",
    "D. T. Son",
    "A. O. Starinets"
  ],
  "comment": "10 pages",
  "journal": "Phys.Rev.Lett. 102 (2009) 051602",
  "doi": "10.1103/PhysRevLett.102.051602",
  "categories": [
    "hep-th",
    "cond-mat.other"
  ],
  "abstract": "Quantum liquids are characterized by the distinctive properties such as the low temperature behavior of heat capacity and the spectrum of low-energy quasiparticle excitations. In particular, at low temperature, Fermi liquids exhibit the zero sound, predicted by L. D. Landau in 1957 and subsequently observed in liquid He-3. In this paper, we ask a question whether such a characteristic behavior is present in theories with holographically dual description. We consider a class of gauge theories with fundamental matter fields whose holographic dual in the appropriate limit is given in terms of the Dirac-Born-Infeld action in AdS_{p+1} space. An example of such a system is the N=4 SU(N_c) supersymmetric Yang-Mills theory with N_f massless N=2 hypermultiplets at strong coupling, finite baryon number density, and low temperature. We find that these systems exhibit a zero sound mode despite having a non-Fermi liquid type behavior of the specific heat. These properties suggest that holography identifies a new type of quantum liquids.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-06-24T01:17:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11.25.Tq",
      "61.20.Gy",
      "11.10.Wx",
      "67.10.-j"
    ],
    "keywords": [
      "holography",
      "quantum liquids",
      "non-fermi liquid type behavior",
      "zero sound mode despite",
      "finite baryon number density"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 788976,
      "adsabs": "2008arXiv0806.3796K"
    }
  }
}