{
  "id": "cond-mat/0404012",
  "version": "v2",
  "published": "2004-04-01T08:54:54.000Z",
  "updated": "2004-10-26T02:05:39.000Z",
  "title": "Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover",
  "authors": [
    "Hui Hu",
    "A. Minguzzi",
    "Xia-Ji Liu",
    "M. P. Tosi"
  ],
  "comment": "4 pages and 4 figures; proof version with more extensive discussions on the comparison between theoretical results and experimental findings; to appear in Phys. Rev. Lett. (Nov. 2004)",
  "journal": "Phys. Rev. Lett. 93, 190403 (2004).",
  "doi": "10.1103/PhysRevLett.93.190403",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "We evaluate the frequencies of collective modes and the anisotropic expansion rate of a harmonically trapped Fermi superfluid at varying coupling strengths across a Feshbach resonance driving a BCS-BEC crossover. The equations of motion for the superfluid are obtained from a microscopic mean-field expression for the compressibility and are solved within a scaling ansatz. Our results confirm non-monotonic behavior in the crossover region and are in quantitative agreement with current measurements of the transverse breathing mode by Kinast {\\it et al.} [Phys. Rev. Lett. {\\bf 92}, 150402 (2004)] and of the axial breathing mode by Bartenstein {\\it et al.} [Phys. Rev. Lett. {\\bf 92}, 203201 (2004)].",
  "revisions": [
    {
      "version": "v2",
      "updated": "2004-10-26T02:05:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "bcs-bec crossover",
      "collective modes",
      "fermi gas",
      "ballistic expansion",
      "results confirm non-monotonic behavior"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}