{
  "id": "1511.04858",
  "version": "v1",
  "published": "2015-11-16T08:13:00.000Z",
  "updated": "2015-11-16T08:13:00.000Z",
  "title": "Ground-state cooling of a mechanical oscillator by noise-interference in Andreev-reflections",
  "authors": [
    "Pascal Stadler",
    "Wolfgang Belzig",
    "Gianluca Rastelli"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We study the active ground-state cooling of mechanical oscillator linearly coupled to the charge of a quantum dot inserted between a normal metal and a superconducting contact. Such a system can be realized e.g. by a suspended carbon nanotube quantum dot with capacitive coupling to a gate. Applying a bias-voltage and focusing on the subgap transport regime, we analyze the inelastic Andreev reflections which drive the resonator to a nonequilibrium state. For small coupling, we obtain that the vibration-assisted reflections can occur through two distinct interference paths. The interference determines the ratio between the rates for absorption and emission processes of vibrational energy quanta. We show that ground-state cooling of the mechanical oscillator can be achieved in a wide parameter range and even for many oscillator's modes simultaneously.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-11-16T08:13:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mechanical oscillator",
      "ground-state cooling",
      "noise-interference",
      "suspended carbon nanotube quantum dot",
      "andreev-reflections"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015arXiv151104858S"
    }
  }
}