{
  "id": "cond-mat/0301255",
  "version": "v1",
  "published": "2003-01-15T05:52:14.000Z",
  "updated": "2003-01-15T05:52:14.000Z",
  "title": "Quantum Friction of Micromechanical Resonators at Low Temperatures",
  "authors": [
    "Kang-Hun Ahn",
    "Pritiraj Mohanty"
  ],
  "comment": "To apear in Phys. Rev. Lett",
  "doi": "10.1103/PhysRevLett.90.085504",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Dissipation of micro- and nano-scale mechanical structures is dominated by quantum-mechanical tunneling of two-level defects intrinsically present in the system. We find that at high frequencies--usually, for smaller, micron-scale structures--a novel mechanism of phonon pumping of two-level defects gives rise to weakly temperature-dependent internal friction, $Q^{-1}$, concomitant to the effects observed in recent experiments. Due to their size, comparable to or shorter than the emitted phonon wavelength, these structures suffer from superradiance-enhanced dissipation by the collective relaxation of a large number of two-level defects contained within the wavelength.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-01-15T05:52:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum friction",
      "low temperatures",
      "micromechanical resonators",
      "two-level defects",
      "micron-scale structures-a novel mechanism"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}